e4c-uda manual
LINK 1 ENTER SITE >>> Download PDF
LINK 2 ENTER SITE >>> Download PDF
File Name:e4c-uda manual.pdf
Size: 4682 KB
Type: PDF, ePub, eBook
Category: Book
Uploaded: 28 May 2019, 18:45 PM
Rating: 4.6/5 from 682 votes.
Status: AVAILABLE
Last checked: 2 Minutes ago!
In order to read or download e4c-uda manual ebook, you need to create a FREE account.
eBook includes PDF, ePub and Kindle version
✔ Register a free 1 month Trial Account.
✔ Download as many books as you like (Personal use)
✔ Cancel the membership at any time if not satisfied.
✔ Join Over 80000 Happy Readers
e4c-uda manualBe sure to read Safety precautions on page 3. Ordering Information Sensor Sensor Heads (Refer to Dimensions on page 4.) Shape Model Straight Side view Straight Side view Power supply Output specifications Amplifiers (Refer to Dimensions on page 4.) Shape Accessories (Order Separately) Mounting Bracket A Mounting Bracket is not provided with the Amplifier Unit. Order a Mounting Bracket separately if required. Appearance An End Plate is not provided with the Amplifier Unit. Order an End Plate separately if required. Appearance Model PFP-M WARNING This product is not designed or rated for ensuring safety of persons either directly or indirectly. Do not use it for such purposes.Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates. Ord er a Mounting Bracket separatel y if required. Order an End Plate separately if required. Shape Model Measuremen t rang e Model M18 Straight 60 to 275 mm E4C-DS30 Side view E4C-DS30L Straight 85 to 735 mm E4C-DS80 Side view E4C-DS80L Straight 110 to 910 mm E4C-DS100 Shape Power supply Output specificatio ns Model DC NPN output E4C-UDA11 E4C-UDA11AN PNP output E4C-UDA41 E4C-UDA41AN Appearance Model Quantity E39-L143 1 Appearance Model Quantity PFP-M 1 Be sure to read Safety prec autions on page 4. Current consumpti on 80 mA max. Control ou tput NPN open collector (26.4 VDC max.), Load current: 50 mA max., Residual voltage: 1 V max.http://agentcctv.com/userfiles/craftsman-door-opener-manual-1-2-hp.xml
- Tags:
- e4c-uda manual, e4c-uda manual.
This product is no t designed or rated for ensuring safety of persons eith er directly or indirectly. Do not use it for such p urposes. Use only an E4C Sensor Head. To adjust the displayed distanc e, use the scaling function. Mutual Interference When installing two or mo re Sensor Heads side by side, ensure that the minimum distances given in th e following table are maintained. The degree of effect depends on t he equipment and surrounding conditions. Check the degree of effect after you install the Sensor Heads in your operating envir onment. Warranlres. Surrabrlily of Use. Programmable Products. Performanoe Dara. Change rn Sgeci?carions. Errors and Omissrons.Terms and Conditions AgreementPlea se read and und ers ta nd this ca t alog be fore pur chas ing the pro duc ts. Plea se consul t you r OMR ON rep re sen tat iv e if y ou have an y q ues tion s o r co mme nt s. W a r r a n t i e s. (a) Exclu sive W arr anty. Omron ’ s excl usi ve warr anty is that the Prod uc ts wi ll be free from defec ts in mater ials and wor kman ship for a peri od of twel ve mon ths from the dat e of sa le by Omron (o r suc h oth er pe riod expr ess ed in wr itin g by Omron ). Om ron dis cla ims all oth er w arranti es, exp res s o r i mpli ed. (b) Limi t atio ns. OMR ON MAKES NO WA RRAN TY OR REPR ESEN T A TION, EXPR ESS OR IMPLIE D, ABOUT NON -IN FRIN GEMEN T, MERCH ANT ABILI TY OR FI TNES S FOR A P ARTI CU LAR PURPO SE O F THE P ROD UCTS.http://cieesc.com/userfiles/craftsman-door-opener-installation-manual.xmlOmr on’ s so le oblig atio n hereu nder shall be, at Omr on’ s ele ction, to (i ) r epl ace ( in the fo rm ori gin ally ship ped wi th Buy er resp ons ible for lab or cha rge s for remo va l o r rep lac emen t thereo f) the non-c ompl yin g Produc t, (ii) rep air the non- comp lyi ng Produ ct, or (iii) rep ay or cred it Buye r an amount equ al to the purch ase pric e of the non-co mply ing Pr odu ct; p rov ided that in n o event sh all Omron be respon si ble for wa rran ty, rep ai r, i ndem nity o r any o the r claims o r e xpe nse s regard ing the Produ ct s unles s Omron ’ s anal ysi s confi rms that th e Produc ts wer e p rop erly ha ndl ed, store d, insta lle d a nd mai nt ain ed and n ot subje ct to cont amin ati on, abuse, misu se or inappr opr iate mod ifi cati on. Retu rn of a ny P rodu ct s by Buy er m ust be a ppro ved in writ ing by Omron be fore shi pmen t. Omro n Co mp anie s sh all not be liab le for the suit ab ili ty or unsui ta bil ity or the resu lt s from the use of Prod uct s in combi nati on with any electr ical or ele ctro ni c comp one nt s, c ircu it s, syst em as sem blie s or any othe r ma teri als or su bst an ces or en viro nme nt s. Any ad vice, rec omme nda tion s or i nfo rmat ion gi ven or ally or in w rit ing, a re not to be constru ed as an ame ndme nt or ad di tion to the ab ove war ran ty. L i m i t a t i o n o n L i a b i l i t y; E t c.S u i t a b i l i t y o f U s e. Omr on Co mp ani es sh all not be re spon sibl e fo r con for mity w it h any st anda rd s, co des o r re gul atio ns w hich app ly to the com bina tio n of the Produ ct i n the Buye r ’ s appli cati on or use of the Produ ct. A t Buye r ’s reques t, Omron will provid e appl icab le thi rd pa rty certi fica tio n docu ment s iden tify in g ratin gs and limit at ion s of use whi ch appl y to the Pro duc t.https://www.becompta.be/emploi/bose-vcs-10-center-speaker-manual-3 Thi s info rmat ion by itse lf is not su f fic ien t fo r a co mple te determ ina tio n o f th e suita bil ity of the P rodu ct in co mbin ati on w ith th e e nd p rod uct, ma chi ne, sys tem, or other appl ic atio n or use. Buye r shall be solely resp ons ible for dete rmi nin g appropr iat ene ss of the pa rti cula r Produc t wit h r espe ct to B uy er’s a ppl icat ion, p rod uct or s ys tem. Buy er sha ll ta ke a ppl ica tio n re spo nsib ili ty in all cas es. NEV ER USE THE PRODUC T FOR AN APPLI CA TION INVOL VING SERI OUS RISK TO LIFE OR PROPER TY OR IN LARG E QUAN TITI ES WI THO UT ENSU RIN G THA T THE SYST EM AS A WHOLE HAS BE EN DES IGN ED T O AD DRES S THE RISK S, AND THA T THE O MRON PRO DUC T(S) IS PR OPER L Y RA TED AND IN ST AL LED FOR THE IN TEN DED USE WI THIN TH E OVE RALL EQU IPME NT O R SY STE M. P r o g r a m m a b l e P r o d u c t s. Omr on Comp ani es shall not be respons ibl e for the user’s prog ram ming of a progr amma ble Prod uct, or any conseq uence the reo f. P e r f o r m a n c e D a t a. Dat a prese nte d in Om ron Comp any w ebsi tes, catal ogs a nd other ma teri als i s provide d as a guide for th e user in de ter min ing sui ta bil ity and does no t con sti tute a w arra nty. It m ay repr ese nt t he r esu lt o f Omr on’ s test con dit ions, an d th e us er m ust cor rela te it to act ual appl ic ati on r equ irem ent s. Actua l p erf orma nce is sub je ct t o t he Om ro n’ s W arr anty an d L imi ta tio ns o f L iabi lit y. C h a n g e i n S p e c i f i c a t i o n s. Pro duc t speci fica tio ns and acce ssor ies may be chang ed at any time based on improve men ts and othe r reaso ns. It is our pra cti ce to ch ange par t numb ers when pu bli shed rati ngs or feat ures are cha nge d, or when si gni fica nt con str uct ion chang es ar e made. Howeve r, some spec ifi cat ion s of the Produc t may be changed wit hou t any noti ce.http://kansascreative.com/images/canon-powershot-g10-owners-manual.pdf When in doubt, spec ial pa rt number s may b e assig ned to fix o r esta bli sh key spec ifi cat ion s for your a ppli ca tion. Please consu lt with your Omron ’ s repre sen ta tive at any ti me t o c onfi rm ac tual spe ci fica tio ns o f p urc has ed Prod uct. E r r o r s a n d O m i s s i o n s. I n f o rma tio n p rese nte d by Om ron Co mpa nie s ha s b een che cke d a nd i s be lie ved to be acc urat e; how ever, no r espo nsi bil ity is a s s umed fo r c leri cal, typog rap hic al o r p roo frea ding er ror s o r o mis sion s. 2015. 1 0 In the int e rest of pr oduct impr ovem e nt, specif i catio ns a r e subj ect to change wi t hout noti ce. Graphic Operation Controller (GOC) has been designed, developed and manufactured by Mitsubishi Electric India and is aimed to meet the optimal automation needs of the Indian and overseas market. Available in Analog Output type with cable and connector options The units can control and monitor various devices connected via communication ports. 16 input and 16 output contact points are provided. Logic programming memory supports up to 8,000 steps with built-in 16 MB screen editor memory. Data logger function allows data storing and backup from control devices. Users can also monitor multiple addresses and channels simultaneously. Extensive image library is provided along with support for various fonts, printer, and bar code readers. It may cause some imported product be delay in delivery. Your feedback is essential for our continuous improvement Privacy Policy Your feedback is essential for our continuous improvement. If you have any question about our product and service please use the inquiry form. Customer Privacy Policy We will reply to your inquiries on the next business day. (except Sundays and public holidays). We will reply to your inquiries on the next business day. (except Sundays and public holidays). You can call us or send enquiry, we would give you the prices, packing,deliverty and more detailed information on the E4C-UDA We cooperate with DHL,TNT,FEDEX,UPS,EMS,etc.They guarantee to meet your needs in terms of time and money,even if you need your OMRON E4C-UDASensors tomorrow morning (aka overnight or next day air) on your desk, 2, 3 days or more.Note to international customers, YES, we ship worldwide. Order an End Plate separately if required. Current consumption 80 mA max. Control output NPN open collector (26.4 VDC max.), Load current: 50 mA max., Residual voltage: 1 V max. External disturbances, however, sometimes cause minute outputs. These sensors enable reliable detection of a wide variety of applications that are difficult to detect using conventional photoelectrics, proximity and vision sensors. The Omron range of ultrasonic sensors are ideal for a number of situations, whether it is detection film, bottles and containers or compact sizes for applications where spacing is a concern or even to ultrasonic sensors that are user friendly and easy to program and use. Motion Solutions is also a leading distributor of world-class automation and motion-control products. Read more. Enables reliable detection that are difficult to detect Compact with a Broad Selection of Side-view Heads A wide range of Side-view Models are available in an M18 metal body - the smallest in its class. This is the first multi-detection sensor that handles all types of sensing object. The Head conforms to IP65, which means it can be used in environments exposed to dust and moisture (Sensor Head only). Free-cut Cable The cable between the Sensor Head and amplifier uses clamp connectors that conform to OMRON original E- con specifications, which makes it easy to cut and adjust the cable length. Cable can be cut anywhere in a 2-m range Short body Side view Long range 3 Amplifiers Amplifier Variations Range Discrimination with Two Threshold Values Twin Output Model Analog Output for More Applications Analog Output Model of a great variety of workpieces optically. Distance Y (mm) Detection Range Features Good Directivity A great improvement has been made to directivity, which is traditionally a weak point of ultrasonic sensors. The influence of peripheral objects that cause detection errors has been reduced. Note: The ultrasonic waves shown are an illustration only. 4 Slim Amplifier with Useful Functions Multi-function Slim Amplifier A two-output or one-output (analog output) amplifier can be selected to suit the application. Scaling Function The zero reset function means that the standard sensor distance display can be easily changed to a workpiece height display. This can be used for a variety of applications, such as position control and multi-level discrimination and detection. Even without a workpiece, the threshold values can be set directly using distance Measured value (mm) Measured value (mm) High Low High Stability Not Influenced by Color or Material Metal, glass, rubber - a wide variety of materials that were difficult to measure without contact can now be measured. Another feature of the E4C-UDA Series is the small error margin in the measurement values. Analog output (V) Linearity (E4C-DS) SUS Glass Rubber White paper Display distance (mm) (Typical example) 5 Easy-to-read Digital Distance Display Distance Display (mm) Simple Settings Using Key Operations Main Display (Red Display) Shows volume of light received and function details Sub-Display (Green Display) Shows threshold values and function settings. Operation Keys Used to make function settings. Far distance ON Operation indicator (channel 1) Lit orange. Output ON Not lit. Output OFF Operation indicator (channel 2) Lit orange. Set the threshold value at a distance 10 in front of the sensing range width in reference to the distance without a workpiece. Example: The threshold is set 25 mm in front of the sensing range for the E4C-DS30 (sensing range: 50 to 300 mm). 3. Display switch 4. MODE key setting 5. Bank selection 0 to 3 Current distance and threshold value Distance between the nearest workpiece on the Near side and the farthest workpiece on the Far side Current distance and distance at peak Current distance and channel No. Teaching with and without a workpiece Automatic-teaching Position teaching Execute a zero reset Position teaching Display Operation Setup 6. Bank registration 0 to 3 7. Display orientation Normal display SET RUN Switch to the SET mode. Threshold value 10. Output method setting Output on each channel This is output only when there is a workpiece between the two threshold value distances. 2BIT output SET RUN Switch to the RUN mode. No workpiece Measurement range 10 For the Analog Output Model 10. Output method setting Range of two preset points is output as 1 to 5 V. Near-distance side rated distance to background setting range is output as 1 to 5 V. Range of two points preset by direct entry is output as 1 to 5 V. 6 Variety of Applications Detection of Transparent Trays Inspection of Solvent Tank Levels Detection of Sheet Sag Detection of Tires Control of Rubber Sheet Tension Detection of Position of Remaining Glass Substrates in Cassettes Note: The E4C-UDA Series cannot be used in some circumstances, depending on the conditions. 7 Ordering Information Sensors Sensor Heads Shape Model Measurement range Model Straight E4C-DS30 50 to 300 mm Side view E4C-DS30L M18 Straight 70 to 800 mm Side view L Straight 90 to 0 mm E4C-DS Note: Refer to the definition of resolution in the Ratings and Specifications tables for information on conditions required to achieve this resolution. External disturbances, however, sometimes cause minute outputs. Please read the Instruction Sheet carefully for information that the user must understand and accept before purchase, including information on warranty, limitations of liability, and precautions. Note: Do not use this document to operate the Unit.A complete lineup designed to offer you with User-friendly Sensing by means electrostatic capacity and is not influenced by the color of the pipe or liquid. Available in 8 to mm dia.Ordering Information. The contact surface with the Photoelectric Sensor with Built-in Amplifier. Compact Sensor Offers Long Sensing Distance and Superior Noise-Immunity Advanced line of miniature Asian style of photoelectric sensors. 40-300 mm background suppression Advanced fiber optic amplifiers for high speed and low contrast applications With the addition of M,.-dia. size, unshielded, pre-wired connector model, and connector model, a total of 0 model Application. Continuous Impact Test. Brush Test Safety Relay Unit Reduces wires and saves space Main features. Description Compact size and high performance for the most challenging detection applications Short Barrel Inductive Prox E2E3-WIREDC. Short Barrel 3-Wire Prox Sensors Meet IP67 Approved by the following standards CHARACTERISTICS The LM10 makes laser sensors super easy to use. New circuitry lowers costs Dimensioned drawing Electrical specifications Operating voltage U B Power consumption P 0 Interface Conforms to VDE0 Resolution of up to 1,024 (10-bit). IP65 oil-proof protection. Strong shaft. Radial: 120 The SSR can now detect heater burnout and SSR short-circuit failure. Heater Burnout Detection SSR Short-circuit Greater resistance to inverter Signal voltage 15. 30 V DC Signal duration. 1 s Input 2. Signal voltage. 1 s Analog output. Models with No Zero Cross for a Wide Range of Applications. RoHS compliant. Models also available Slim Plug-In Safety Relay. Slim Safety Relay for Machine Control. H Slim body only 13 x 24 x 50 mm Ordering Information. Sensors Also, in addition Photoelectric reflex switch W50: iniature photoelectric switch series with completely integrated electronics Through-beam Digital Pressure Sensor. Ordering Information. Sensors (Refer to Dimensions on page 7. Light Curtain Sensors. Type. Radial Cross Ray Method. Detecting width. Light axis interval It is connected to the EIB via the bus connecting terminal supplied. Gateway For Connecting EnDat Encoders to PROFIBUS-DP Achieve Total Cost Reduction through High-density Mounting and Reduced Wiring. Terminal Arrangement All-in-one package for open channel flow measurement. Product specific application. Relay monitored parameters 250 V DC 5 A DC Application: Product Features: Easier connection to OMRON PLCs and Temperature Controllers, To use this website, you must agree to our Privacy Policy, including cookie policy. Discover everything Scribd has to offer, including books and audiobooks from major publishers. Start Free Trial Cancel anytime.Browse Books Site Directory Site Language: English Change Language English Change Language. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Please see our Privacy Policy for more information. Update your browser for more security, comfort and the best experience for this site. Try Findchips PRO. Shape: M18. Model: Straight. Measurement range: 60 to 275 mm. Compact, Cylindrical Reflective. Ultrasonic Sensor with Easy Setting. Stable operation for a variety of objects regardless of color, transparency, or material (metallic or non-metallic). Compact M18-sized cylindrical Head. Product lineup includes Side-view Heads. Check the sensing object distance and sensing position, (i.e., threshold) on the digital display. Amplifiers include models with analog outputs. Sensing distance: 40 m. Output configu ration: PNP. Long-distance Photoelectric Sensor. Long sensing distance that is approximately 8, times that of our conventional model (for the, Through-beam and Diffuse-reflective models) E4C-DS30. (Through-beam: 40 m, Retro-reflective: 7 m, and, Diffuse-reflective: 2 E4C-DS30 5 m.). Improved visibility: A red LED that makes the spot visible. Large indicators that can be seen even from a, distance. Improved operability. (Enlarged sensitivity adjuster and operation selector) Freely selectable power supply input (24 to 240 VDC, 24 to 240 VAC). (Additional types added to the DC type lineup E4C-DS30. ) Models with infrared LEDs are also available. Appearance: M5. Sensing distance: 3 mm. Connecting method: M8 Pre-wired Connector Models (0.3 m). Cable specifications: PVC (oil-resistant). Model: NPN output. Ultra small size, but surprisingly easy installation. With the addition of M4, 5 E4C-DS30. 4-dia., 6.5-dia. size, unshielded, pre-wired connector model, and connector model, a total of, 108 model variations are available. High-speed response frequency stably detects moving, objects: 5 kHz max. Four indicator lamps for easier indicator positioning. Special mounting brackets reduce time and efforts for, installation. Protective Stainless-steel Spiral Tube against wire, breakage is available (M4, M5 only). Models also available with standard cables that are 5 m long, or with robot (bending-resistant) cables. Field of view: Wide View (Short-distance). This Vision Sensor provides all of the best-selling, features found in high-end models withoutt the, need as in vision system for a separate controller E4C-DS30. This new Smart Camera was designed to attract, potential customers to try the FQ2 Series. A wide range of sensors including diffuse-reflective, through-beam, retro-reflective and distance-settable sensors, as well as sensors with either built-in or separate amplifiers are available.With separate-amplifier Sensors, the light from the Amplifier is transmitted through a fiber to enable detection in narrow places and other locations with limited access. Exceptionally easy operation and stabilizing technology reduce maintenance cost. Thinnest in the industry. Available in one or two outputs. Allows precise settings through adjustment of threshold values. Large, Easy-to-Read Displays that are clear even from a distance. Seven convenient display formats. Stable long-term performance achieved with OMRON's Auto Power Control (APC) function. Position control, height distinction, and other applications with analog output. Slimmest in the industry -- 5 mm per channel. Flexible control with mobile console. Non-contact operation simplifies mounting and maintenance. Fiber flexibility prevents breaking. Convenient design accommodates two wrench sizes. Allows quick tightening. Immediately determine operation and amount of light with a simple, bright display. General-purpose capabilities to simply handle a broad range of applications. Wire saving connectors. Mutual interference prevention functions. Easy and reliable digital sensors with the same detection performance as previous models. APC to ensure LED light level remains stable forever. Wire saving connector. Mobile console. Three clear display mode. Range of innovative display modes. Eliminate all wirings while using digital amplifier.Many types of Photo Microsensors are available including Slot-type Sensors (through-beam) for non-modulated or modulated light, Reflective Sensors, and Sensors with separate emitters and receivers.A new concept in image processing that considers machine cycle time. Suitable for all types of processing and packaging applications. Total image processing system, from camera with integrated light source to image-processing unit. Automatically calculates glue width and detects angled gaps even complex curved path. Application software package to do complicated tasks at an ease. Memory card to expand image memory and scenes. Suitable for all types of processing and packaging applications. And ever greater evolution for the Smart Sensors. A body size on the same level as a photoelectric sensor contributes to on-site space conservation and solves installation space problems. ZX Series multi-point measurement and calculation functions further expand the application coverage. Develop applications with sub-micron sensing technology. Smart, stylish, more efficient maintenance and wide selection of sensor heads. This is the smart answer to high-precision measuring applications that were difficult with non-contact types. Total image processing system, from camera with integrated light source to image-processing unit. Low repeatability creates the need for a sensor for constant in-line monitoring to properly capture static electricity. Environment-resistant, heat-resistant, chemical-resistant and water-resistant models are available. Linear Encoders are also available to measure linear movement. Differential Pressure Flow Sensors are also available. Both analog bar and digital pressure values are displayed. Easy operation by the automatic teaching function. Bears CE markings. The industry's smallest pressure sensor, compact, lightweight-ideal for robot arms. Easy-to-see red LED indicator. Linear current output models available. Withstands a pressure of 490 kPa and highly reliable. Enables reliable detection of a great variety of workpieces that are difficult to detect optically. Compact, vertical design with built-in amp allows easy mounting on compact conveyor lines. Data Loggers accept multi inputs in voltage, temperature, humidity, pulse and also logic format, which makes them practical in various fields. Simultaneous sampling on all channels, with super-wide voltage input range. Secure isolated multi-input and advanced PC connectivity. Simultaneous measurement of temperature, humidity, voltage and other factors can be performed. Isolated multi-function inputs. Ionizers and Air Cleaning Systems help you to measure static electricity, ionize static charge, continuously monitor dust particles and protect production area from dust particles in factory processing and test environment. Easy installation. Clearly visualize differential pressure shifts at all times. The ZN-PD-S provides continuous high-precision monitoring at low setup cost. Localized Continuous Clean-Monitoring Systems provide many ways to improve quality and enable perfect reporting of production process monitoring. From pin-point to wide-area ionization, the optimal ionization for the application is now possible. Ionizes areas wider than the Ionizer itself. Steady ionizing performance, even over long distances. The newly developed airflow control system (AFCS) structure provides a uniform airflow. Long-term ionization performance with clean and easy maintenance. Low repeatability creates the need for a sensor for constant in-line monitoring to properly capture static electricity. Eliminates the manpower, time, and costs of light source replacement. A newly developed lock structure that maintains compatibility with conventional, screw-type M12 connectors. Compact FA connectors satisfy IP67 requirements and ensure a 94V-0 fire retardant rating. Conventional M8 screw-mounting models are available along with S8 snap-in models that connect and disconnect with one touch. Greatly reduce wiring in combination with the Smartclick XS5. Trucks were considered utility vehicles and had to be serviceable with accessible components. Electronics did not end ease of troubleshooting. The code you pulled from the '94 is actually very helpful. OBD (onboard diagnostics) can be quite useful, though certainly not always able to pinpoint a problem or offer a solution. When the heater core of a 2012-up Jeep JK Wrangler takes a dealership professional 8 hours to replace, at the expense of tearing half the under dash apart, I have trouble calling this traditional Jeep utility model a readily serviceable vehicle. Visualizing my head downward under the dash with feet over the seat tops while servicing the heater does not appeal to me.Lately, in overdrive it will not shift from second gear, and on the occasion it does, it sometimes revs as if the truck is in neutral. What could be causing this. The check engine light is on as well. Auto Zone and others will often read a code for free on OBD. Or you can purchase a simple and inexpensive code reader (only) that does not do diagnostics. What we need is a code, I'll help troubleshoot from there. This is the kind of trouble we're seeking, something that might connect the Engine Check (actually powertrain, including the transmission) to your symptom. It would be advantageous to find a simpler problem than something deeper within the transmission. From what info I've gathered a 12 is idle control fault, 13 is dc motor did not move, but 27 seems to be a ghost. This is a crucial signal in the PCS, and you're getting a clear message of a fault. Before racing to replace the VSS, look for wiring and connector troubles, the easier remedies. If the VSS unit tests defective, I would replace it, regardless of whether there are additional troubles with the transmission. Also check the shift linkage and the shift module at the transmission for clear engagement in each shifter position. Chock the wheels, set the parking brake, and do not run the engine during this check.