P-Linc User Manual Rev3
Contents
1. qiHs LLLP s mu 8 L 9 S v IND LEGEND 9 1 234 lt CJ fd Gd INSTALLED 4 NOT INSTALLI 2c Cc c ZO 220 Q CA gt O O5 O C26 C25 lt lt gt O Q O O O O lt T OAGY C28 27 28 6 6 6 6 4 6 4 6 0 6 4 6 45 6 4 6 0 0 0 45 45 1 5 OMOV d sMARTEYE CORPORATION 2637 BOND STREET ROCHESTER HILLS MICHIGAN 48309 PHONE 248 853 4495 FAX 248 853 85392. DRAWN BY JMA TITLE CHECKED BY SMARTEYE P LINC KLC 9 15 94 CIRCUIT BOARD LAYOUT 1 OF 1 DRAWING NO 5 2004 01 200 H NSMARTEYENPRODUCTSNSP2004 1_P LINCN200 1 0 DWG PLOTTED 04 02 03 AT 10 24 FROM SMARIEYE P LINC AUXILIARY PORT H SMARTEYE PRODUCTS SP2004 1_P LINC 311 1 0 DWG PLOTTED 04 02 03 AT 10 25 P LINC AUXILIARY PO USER DISPLAY TERMINAL CABLE DETAIL 1 DETAIL 1 MALE 9 5 425 D CONNECTOR BELDEN 8723 REC 5V GND XMT NC SHIELD 3 A RED z BLACK 2 GREEN WHITE SHIELD TRANSMIT SIGNAL GROUND RECEIVE NC EARTH GROUND TO USER DISPLAY TERMINAL DESCRIPTION DATE APPR BY INITIAL RELEASE 9 30 94 MDB x NC AP NOTE LEGEND MALE 9 PIN D CONNECTOR NO CONNECTION AUXILARY PORT P LINC MAXIMUM LENGTH OF RS 423 IS 400 AT 9600 BAUD gt sMARTEYE CORPORATION 2637 BOND STREET ROCHESTER HILLS MICHIGAN 48309 PHONE 248 853 4495 FAX 248 853 8539 DRAWN BY RSA TITLE CHECKED BY KLC SMARTEYE P LINC ENGINEER KLC AUXILIARY COMMUNICATION PORT DATE 9 15 94 CABLE DETAIL SHEET 1 OF SCALE 04 1 DRAWING NO SIZE SP2004 01 311 D DESCRIPTION DATE APPR BY
3. 8 10 1 READER NUMBER DESCRIPTION Ro es esae 8 nennen enden E O AEE E E sense seen 8 12 0 PARALLEL COMMUNICATION PROTOCOLL 8 12 1 TRANSACTION STEPS SS SZ S L ER u SD cone ath ss ee SER i ie eee 8 12 2 DBSIGN CONSIDBRATIONS un un eti u S u m Sisaq 9 13 0 SPEED OF RESPONSE 10 14 0 AUXILIARY PORT OPERATION O vo ct soe nee Qala er vou Forni 10 14 1 PARALLEL PORT MONITOR MODE SW2 5 ON enne nennen 10 14 2 CONTROL PORT RECEIVE MONITOR SW2 6 ON n u eene ener enne nennen rennen inneren 11 14 3 CONTROL PORT TRANSMIT MONITOR S W2 7 12 15 0 ERROR MESSAGES m 13 16 0 APPENDIX DRAWINGS ans A 1 Filename P Linc User Manual R4 doc SMARTEYE n Control wp SMARTEYE P Linc User Manual Page 1 1 0 Introduction The Smarteye P Linc connects up to 8 Smarteye Electronic Assemblies SEA 8s and or Twins on a serial RS485 multidrop communication line Smarteye reader data is receiv
4. 2 8 0 VOCE EBORE CR 2 DATA BITS 5 ni EE PR ulus a mun tn ad 3 8 2 READER BITS RDRO RDRS 3 8 3 READY BITS RDY 0 luu eei een ae ever ted RD ase 3 8 4 PARITY 2222 CGCR tm 3 8 5 LABBE ERROR BIT LI E teens te 3 8 6 DATA ACKNOWLEDGE 4 9 0 P LING CPU CIRCUIT CARD esee sores inve 4 9 1 CONFIGURATION LEGEND n emen ener ns sien sess 4 9 2 P LINC SOFTWARE CONFIGURATION PARAMETERS 5 2 0020024 00 00030103050 08 5 9 3 MEMORY CONFIGURATION JB2 eeccecssccesecesseeceseceesceceseeeeneecaeeeeneecaeeseaeecaeeseaeecuceseaeecaeeseaeeceaeeseaeeceaeeseneecsas 6 9 4 CONTROL AND AUXILIARY SERIAL PORTS TERMINATION SW1 AND JB1 6 9 4 1 CONTROL PORT MULTIDROP LINE TERMINATION NOTES SW1 7 9 4 2 SHIELD TERMINATIONS AND AUXILIARY PORT SIMPLE TERMINATION 7 10 0 SEA 8 AND TWIN ADDRESSING
5. Parallel Output Representation 0 binary 1 BCD Send Errors to PLC 0 disabled 1 enabled Not used Parallel Port Monitor 0 disabled 1 enabled Control Port Rec Monitor 0 disabled 1 enabled Control Port Xmt Monitor 0 disabled 1 enabled Parallel Output Test 0 disabled 1 enabled Aux serial port config BL 9 5 Y Ek L I L SW2 1 SW2 2 SW2 5 2 7 SW2 8 Note SW2 1 and SW2 2 are read once at power up The data bits DO D15 and the reader bits RDRO RDRS can be configured as binary or BCD with this switch The switch diagram above is set for binary outputs In binary mode the label number range is 1 65535 and the reader number range is 0 63 In BCD mode the label number range is 1 9999 and the reader number range is 0 39 Errors from an SEA reader or P Linc generated errors are sent to the programmable controller via the parallel port if this switch is on When an error occurs the L E bit will be 0 and the data bits form the error number If this switch is off then no errors are sent to the programmable controller The L E bit will be 1 except at power up The switch diagram above is set to enable errors The auxiliary serial port 9 pin D connector can be used to monitor the control port or the parallel port If SW2 5 is enabled then the data which is sent out the parallel port is displayed on a user s terminal in real time
6. Control Port Shield to Chassis Ground Z av 2252222 Auxiliary Port Shield Terminal to Chassis Ground gt Auxiliary Port Receiver Simple Termination SW1 1 Places a 220 ohm resistor across the input of the control port RS485 receiver for simple termination SW1 2 Ties the non inverting REC terminal of the control port RS485 receiver to 5 volts through a 470 ohm resistor for passive biasing Filename P Linc User Manual R4 doc K sMARTEYE p Control SMARTEYE P Linc User Manual Page 7 SW1 3 Ties the inverting REC terminal of the control port RS485 receiver to ground through a 470 ohm resistor for passive biasing SWI 4 Places a 220 ohm resistor across the output of the control port RS485 driver for simple termination 1 1 Connects the control port shield terminal to chassis ground at the P Linc JB1 2 Connects the auxiliary port shield pin to chassis ground at the P Linc 1 3 Places 470 ohm resistor across the receiver of the auxiliary port for simple termination 9 4 1 Control Port Multidrop Line Termination Notes SW1 A maximum of 8 SEA units Twins and or SEA 8s may be connected to the P Linc s RS485 multidrop line control port In this multidrop configuration the transmitters of all SEA units are connected in parallel to the P Linc s receiver Similarly the SEA units receivers are connected in parallel to the P Linc s transmitter The following restrictions must be observed i
7. 4 gt SMARTEYE in Control SMARTEYE P Linc User Manual Page 10 13 0 Speed of Response The time delay from the completion of the label read process the last bit of the label passes the Smarteye Reader to the receipt of the reader number and label number in PLC memory is defined as speed of response SOR The SOR can be as little as 40 mS but is directly dependent on the PLC scan time The P Linc will not send new data out the parallel port until the PLC matches the RDY bits from the previous message The SOR is also affected to a lesser extent by the number of reads which occur within a very short time window Smarteye in house testing concluded that the SOR for 64 simultaneous reads with a 10 mS PLC scan time was 2 5 seconds 14 0 Auxiliary Port Operation The auxiliary serial port is designed to aid the user during startup or troubleshooting Messages are transmitted with the following communication parameters 9600 baud one start bit eight data bits no parity and one stop bit Any messages received by the auxiliary port are ignored The three modes of this serial port are described below Only one mode can be selected via SW2 5 or SW2 6 or SW2 7 at a time 14 1 Parallel Port Monitor Mode SW2 5 on Parallel port data is sent from the Auxiliary port in real time when this mode is enabled Non idle input messages from the control port are also sent This allows the user to verify that the P Linc is properly transmitting the
8. User Manual VERSION L1 5 Revision 4 de SMAR CORPORATION www smarteyecorporation com related documents SMARTEYE Electronics Assembly User Manual SMARTEYE Twin User Manual The material in this manual is for informational purposes and is subject to change without notice SMARTEYE Corporation assumes no responsibility for any errors which may appear in this manual SMARTEYE Corporation SMARTEYE is a registered trademark of SMARTEYE Corporation Printed in U S A SMARTEYE contact information SMARTEYE Corporation 2637 Bond Street Rochester Hills MI 48309 Phone 248 853 4495 Fax 248 853 8539 www smarteyecorporation com Email support smarteyecorporation com SMARTEYE P Linc User Manual Page i Table of Contents EO INTRODUCTION HQ 1 2 0 DESCRIPTION ssssascsssesscvanessscccsessaseanbesacessessacdeunstacvessusbsoncessesedsedostacesdasvoveosssessbs een 1 3 0 P LINC INSTALLA TION esee ee eee ve wa Wii Pe eee veh Verr uvae ve abacus 1 4 0 AC POWER WIRING RE 1 DO POWERSUBPIY Z L uu Q Ska 2 6 0 CONTROL SERIAL PORT RS485 WIRING 2 7 0 AUXILIARY SERIAL PORT RS423 WIRING
9. Non idle messages received by the control port are also displayed If SW2 6 is enabled then the serial data which is received by the control port is displayed in real time If SW2 7 is enabled then the serial data which is transmitted by the control port is displayed in real time Only one monitor can be enabled at a time See section 14 0 for details on Auxiliary serial port operation This switch is used for troubleshooting the parallel port All 26 parallel output bits are turned on if this switch is on The outputs will remain on until the switch is turned off and a new label or error message Is sent out the parallel port M Filename P Linc User Manual R4 doc SMARTEYE n Control 4 wp SMARTEYE P Linc User Manual Page 6 9 3 Memory Configuration JB2 The memory configuration is set at the factory and should not be altered it is shown here for reference only JB2 32K EPROM 8K or 16K EPROM 32K EPROM gt SK EPROM 9 4 Control and Auxiliary Serial Ports Termination SW1 and JB1 SWI and are provided to allow proper termination of the serial communication lines Normally the switches and jumpers are configured as shown below A description of each switch and jumper follows the diagrams SWI Receiver simple termination Control passive bias port _ Rec passeive bias Termination Xmt simple termination
10. This message is not transmitted on the parallel outputs but is shown on the auxiliary port for the user s information E52 is transmitted on the parallel port 53 Parity error in character of SEA unit message received 54 Checksum error in SEA unit message received 55 SEA unit message received without lt cr gt terminator 56 Unrecognizable received message Filename P Linc User Manual R4 doc ur SMARTEYE Control SMARTEYE P Linc User Manual Page 1 16 0 Appendix A Drawings Circuit Card Layout SP2004 01 200 Auxiliary Communication Port Cable Detail SP2004 01 311 Field Wiring Details SP2004 01 411 Control Port RS 485 Wiring SP2004 01 412 Installation Details SP2004 01 420 Filename P Linc User Manual R4 doc ur SMARTEYE Control DESCRIPTION DATE INITIAL RELEASE 10 3 94 SMARTEYE CORPORATION P LINC CPU SP2012 01 deo SPA S S GS GG no Ni 20 0 Qe IWIMAS X c UJ oO cy ou N GS QS GS GG r oO SWITCH SETTING LEGEND ON 1 m OFF 0
11. INITIAL RELEASE 10 3 94 MDB SMARTEYE RATION P sql E RPS N a LD 5 a m T AUXILIARY 7 GND CX rS 00 CN TE SUC OU ELA XS gt wQ 2 00900 t GGG YO e e e e e e e e e e e 2 u J PARITY J LABEL OR ERROR SERIAL RS 485 SERIAL RS 423 DATA BITS BINARY READER BITS MULTIDROP OUTPUT OR BCD BINARY OR BCD LINE TO TO USER DISPLAY SEA 8 AND OR TERMINAL TWINS 8 UNITS MAX oo uL READY BIT READY BIT AC INPUT 120 VAC 60 HZ POWER SUPPLY ALLOWS 4 SMARTEYE 220 VAC INPUT CORPORATION 2637 BOND STREET ROCHESTER HILLS MICHIGAN 48309 PHONE 248 853 4495 FAX 248 853 8539 24VDC wur TO DC OF OUTPUT MODULE TO COMMON OF PLC INPUT MODULE ACKNOWLEDGE BITS INPUTS FROM PLC OUTPUT MODUL 24VDC TRUE
12. P Linc circuit card provides 3 plug in screw terminals for the parallel port connections The parallel port outputs must connect to a 24VDC input module and the two inputs must connect to a 24VDC output module Discrete 18 gauge wire such as Belden 8501 or equivalent is recommended for these connections Parallel wiring details can be found on drawing SP2004 01 411 in Appendix E Filename P Linc User Manual R4 doc gt SMARTEYE in Control SMARTEYE P Linc User Manual Page 3 Notes 1 Data presented by a P Linc on its parallel output lines is binary 1 each output represents a bit in a binary field off 0 on 1 2 The least significant bit of the data field is D0 and the most significant is D15 The least significant bit of the reader field is and the most significant is 5 3 Connecting all P Linc parallel outputs to an input module may not necessary Example binary mode with 10 bit labels D0 D9 must be wired D10 D15 will always be 0 and wiring is therefore optional 4 The P Linc is configured for true high operation 1 a binary 1 24VDC and a binary 0 GND 8 1 Data Bits D0 D15 The data bits DO D15 define the value of the label or error number This field may be binary or BCD dependent on the position of SW2 1 8 2 Reader Bits RDR0 RDR5 The reader bits RDR0 RDR5 define the value of the reader number This field may be
13. gt 2 gt R020 R040 R044 1 NOTES CONTROL PORT TWIN Fd Lore 1 THE LAST TWIN OR SEA 8 ON THE MULTIDROP 5 485 5 485 5 485 LINE MUST HAVE SIMPLE LINE TERMINATION CABLE DETAIL 2 CABLE DETAIL 2 CABLE DETAIL 2 2 MAXIMUM LENGTH OF RS 485 IS 4000 5 IN THE MULTIDROP CONFIGURATION EACH TWIN OR SEA 8 MUST HAVE A UNIQUE STARTING ADDRESS 4 VALID ADDRESSES ARE 00 10 20 30 40 50 60 70 OCTAL 5 SEE THE TWIN OR SEA 8 USER MANUALS FOR ADDRESSING DETAILS DETAIL 1 DETAIL 2 5 485 5 485 BELDEN 9750 BELDEN 9750 XMT LAC sr an 2 lt SMARTEYE FROM une GREC PREVIOUS TO NEXT CORPORATION SMARTEYE SMARTEYE SMARTEYE 2637 BOND STREET ROCHESTER HILLS MICHIGAN 48309 SEA 8 OR OC REC SEA 8 OR SEA 8 OR PHONE 248 853 4495 FAX 248 853 8539 TWIN ACK3 TWIN TWIN L DRAWN BY RSA TITLE NC En CHECKED BY SMARTEYE P LINC X GND ex ENGINEER KLC RAINS 3 DATE 9 15 9
14. messages it is receiving The messages are displayed in a man readable format reader is displayed in octal format and label error number is displayed in decimal format as shown below 98 15 39 441 lt 02 gt L00504 02557 98 15 39 530 lt 02 gt L00504 98 15 40 291 lt 41 gt 10 T02S5Zcf 98 15 40 350 lt 41 gt E10 The parallel output message format is hh mm ss sso lt id gt Lnnnnn Label Message hh mm ss sso lt id gt Enn Error Message The serial input message format is hh mm ss ssi lt id gt Lnnnnn TnnSnZzz Label Message hh mm ss ssi lt id gt Enn TnnSnZzz Error Message Where _ _ _ _ __ _ _ Filename P Linc User Manual R4 doc SMARTEYE in Control SMARTEYE P Linc User Manual Page 11 hh mm ss ss timestamp hours minutes seconds since P Linc power up i input message from serial line output message from parallel lines lt id gt reader ID number octal Lnnnnn Label field decimal Enn Error field decimal Tnn time field age of message Sn sequence number 0 to 9 Zzz checksum For a complete explanation of the time sequence and checksum fields refer to the Smarteye Electronic Assembly or Smarteye Twin User s Manual 14 2 Control Port Receive Monitor SW2 6 on Data which is being received from Twins or SEA 8s is sent from the Auxiliary port in real time when this mode is enabled Much of thi
15. 0 1 0 DWG PLOTTED 04 02 03 10 27
16. 4 CONTROL PORT RS 485 WIRING amp X CHASSIS GROUND lt lt SHEET 1 OF 1 mE SCALE NTS DRAWING NO SZ B SP2004 01 412 H NSMARTEYENPRODUCTSNSP2004 1 P LINCV412 1 0 DWG PLOTTED 04 02 03 AT 10 26 DESCRIPTION DATE APPR BY INITIAL RELEASE 10 3 94 MDB 90 22 5 59 4 PLACES SMARTEYE CORPORATION PS ING 250VAC 1 a T SHID 3 REC 24VDC 2 AUXILIARY 7 GND JE N QUT o 9999 oly 0000 gt VOW OW ONNO OVO OO VO 11 88 301 63 3 00 76 20 12 50 317 50 I 3 43 87 12 Ya d SMARTEYE CORPORATION 2637 BOND STREET ROCHESTER HILLS MICHIGAN 48309 PHONE 248 853 4495 FAX 248 853 8539 DRAWN BY RSA TITLE CHECKED BY SMARTEYE P LINC ENGINEER KLC DATE 9 15 94 INSTALLATION DETAILS SHEET 1 OF 1 SCALE NTS DRAWING NO SIZE D 5 2004 01 420 H NSMARTEYENPRODUCTSNSP2004 1_P LINCN42
17. AC power and ground particularly the National Electrical Code published by the National Fire Protection Association of Boston Massachusetts 5 0 Power Supply A single 24 VDC power supply is included in the Smarteye P Linc chassis This supply provides power for the CPU circuit card The power supply has a screw for adjusting its output voltage Using a voltmeter the output voltage may be adjusted to approximately 24 VDC The power supply includes automatic current limiting circuitry with automatic recovery which limits short circuit output current to a safe value This provides protection against damage due to accidental shorting An AC line filter is incorporated into the power supply to reduce noise from line to line and line to ground 6 0 Control Serial Port RS485 Wiring The serial communication line between the P Linc and SEA 8 s and or Twins is a multidrop network which conforms electrically to RS485 The recommended cable is Belden 9730 or equivalent Total cable length from the P Linc to the last Twin or SEA 8 on the multidrop line cannot exceed 4000 feet The proper connections are shown on drawing SP2004 01 412 in Appendix A 7 0 Auxiliary Serial Port RS423 Wiring The auxiliary port connections require a 9 pin male D type connector Belden 8723 or equivalent 2 shielded pairs 22 gauge is recommended for the RS423 connection Detailed wiring drawing SP2004 01 311 can be found in Appendix A 8 0 Parallel Wiring The
18. HIGH OUTPUTS TO PLC INPUT MODULE 24 VDC TRUE HIGH DRAWN BY RSA TITLE CHECKED BY SMARTEYE P LINC ENGINEER KLC DATE 9 15 94 FIELD WIRING DETAILS SHEET 1 OF 1 SCALE NTS DRAWING NO SIZE D PREWIRED FROM FACTORY 5 2004 01 411 H SMARTEYE PRODUCTS SP2004 1_P LINC 411 1 0 DWG PLOTTED 04 02 03 AT 10 26 DESCRIPTION DATE APPR BY CONFIGURATION 1 CONFIGURATION 2 INITIAL RELEASE 10 5 94 MDB RS 485 POINT TO POINT RS 485 POINT TO POINT SMARTEYE SEA 8 TWIN CABLE DETAIL 1 RS 485 CABLE DETAIL 1 LEGEND PLUG IN SCREW TERMINATION CONFIGURATION Z3 INDICATES SIMPLE LINE RS 485 MULTIDROP TERMINATION INSTALLED SMARTEYE SEA 8 SMARTEYE SEA 8 NO CONNECTION SERIAL DATA LINE TWIN TWIN STARTING ADDRESS OF 220 R027 TWIN OR SEA 8 Os R025 son CONTROL PORT P LINC u e SA 040 49 gt R023 R022 ieessesiessses Esssss K YY RS 485 amp J22 R021 ae CABLE DETAIL 1
19. al Page 4 8 6 Data Acknowledge ACK The two data acknowledge bits are the only parallel inputs received by the P Linc A control device must set the data acknowledge bits to the same value as the two data ready bits signaling recognition of the most recent transition of data ready See section 12 0 Parallel Communication Protocol 9 0 P Line CPU Circuit Card The Smarteye P Linc CPU circuit card includes the following features 26 bit parallel output port 24VDC true high 2 bit parallel input port 24VDC true high Interface to a serial RS485 multidrop network line control port Interface to a serial RS423 monitor line auxiliary port LED s for serial XMT and REC control port and for the parallel port ACK and RD Y Switches to set software operating parameters and control port termination Jumper blocks to modify shield terminations and memory size The diagrams on the following pages describe the function of the various Jumper blocks and switches Prior to shipment the switches and jumpers are factory configured as shown in Appendix A drawing SP2004 01 200 9 1 Configuration Legend switch closed 1 switch open 0 77 jumper block installed jumper block not installed Filename P Linc User Manual R4 doc SMARTEYE in Control SMARTEYE P Linc User Manual Page 5 9 2 P Linc Software Configuration Parameters SW2 SW2 140
20. binary or BCD dependent on the position of SW2 1 8 3 Ready Bits RDY0 RDY1 A change of state in the two ready bits signals the control device that the P Linc has new data on its output lines If the ready bits are 01 or 10 then the control device should receive the new data and perform appropriate control action If the ready bits are 00 or 11 then the control device should ignore the data take no control action A full description of this protocol appears in section 12 0 Parallel Communication Protocol 8 4 Parity Bit PARITY The parity bit enables the control device to determine the validity of data received from the P Linc Thus if an input output point should fail on either the control device or the P Linc or if a connection between the two should be lost then the control device can detect the fault and issue an alarm and or stop the controlled operation until repairs are made The value of the parity bit is always set so that an odd sum results when the number of bits turned on in the data field 00 015 the reader field RDRO RDR5 and the Label Error bit L E are added with the parity bit itself 8 5 Label Error Bit L E The label or error L E bit defines the data bits DO D15 as an error number or a label number If this bit is a 1 the data is a label number If the bit is a 0 the data is an error number Filename P Linc User Manual R4 doc gt SMARTEYE In Control SMARTEYE P Linc User Manu
21. e Twin and or Smarteye Electronic Assembly User s Manual for details on the serial communication protocol BZak BZck 0BZdc 8BZdk A typical message format is lt id gt BZzz Where lt id gt reader ID number binary A ack the previous device transmission B box poll Zzz checksum For a complete explanation of the commands checksum fields etc refer to the Smarteye Electronic Assembly or Smarteye Twin User s Manual E Filename P Linc User Manual R4 doc wp SMARTEYE n Control SMARTEYE P Linc User Manual Page 13 15 0 Error Messages The error messages defined below are generated by the P Linc Check the SEA 8 and or Twin user manuals for a description of errors which they generate All error codes regardless of their source will appear on the parallel output port as they occur if SW2 2 is on The errors E52 E56 are set with a reader address of 0 since the reader number is either too big or the received serial message has a data error Error Code Description 50 BCD label number is too big to send to the PLC This error occurs when the P Linc is in BCD mode and a serial label message is received which is greater than 9999 52 BCD reader number is too big to send to the PLC This error occurs when the P Linc is in BCD mode and a serial message is received with a reader number greater than 39 Note In Parallel Port Monitor Mode this message will be preceded by an output message of the correct reader number
22. e shielding Mounting dimensions for the P Linc can be found on drawing SP2004 01 420 in Appendix A of this document 4 0 AC Power Wiring The Smarteye P Linc requires 0 4 amps at 120VAC 48VA The input voltage may vary from 85 132VAC An optional power supply allows input voltages of 105 265VAC Frequency range is 50 60Hz in all cases The P Linc has three terminals for AC power connections located on the exterior bottom right of the chassis These terminals provide connections for L1 N and ground A glass type 1 AMP fuse is used to protect the hot side of the line A two pole power switch opens both sides of the AC line circuit in the OFF position E Filename P Linc User Manual R4 doc 4 gt SMARTEYE in Control SMARTEYE P Linc User Manual Page 2 The Smarteye P Linc has been designed to be as immune to AC power line fluctuations as is practical However like most electronic equipment it can be susceptible to brownouts and severe voltage spikes The P Linc should be powered with an AC line which is fed from the secondary of a transformer whose primary is electrically as close to the main power source of the facility as possible The AC line can supply other similar electronic equipment such as programmable controllers but should not power any heavy industrial equipment that causes excessive line fluctuations such as motors motor starters welders etc All applicable codes and ordinances should be observed for wiring
23. ed on the serial communication line and converted to parallel digital 24VDC outputs The digital outputs of the P Linc are directly wired to digital input modules of a PLC Two bits of the output data the data ready bits signal the preparation of new data on the output lines A control device recognizes new data receives it and then provides two output bits which match the data ready bits These outputs are received by the P Linc on its two 24VDC input lines and interpreted as data acknowledge bits The P Linc parallel port has 28 bits 26 outputs and 2 inputs The 26 outputs consist of 16 data bits 6 reader bits 2 data ready bits a parity bit and a label or error bit The two input bits are used for data acknowledge The 16 data bits and 6 reader bits can be configured as either binary or BCD 2 0 P Linc Description The Smarteye P Linc contains P Linc CPU circuit card power supply on off switch fuse mounting base and interconnecting cables The unit is completely assembled and ready for use 3 0 P Linc Installation The Smarteye P Linc is designed to function in the environment found in most industrial facilities The P Linc will operate properly in the same environment as a programmable controller It is rated for operation at temperatures from 0 to 50 C Electromagnetic interference on signal lines will not be a problem if the recommended cables are used for equipment interconnections The recommended cables will provide adequat
24. ig for addresses 50 70 octal 10 1 Reader Number Description The starting address and SEA unit type SEA 8 or Twin determine the range of reader numbers for an SEA 8 or Twin An SEA 8 with a starting address of 60 will have reader numbers 60 67 A Twin with a starting address of 10 will have reader numbers 10 and 11 Reader numbers 12 thru 17 are not available A Twin occupies the space for 8 reader numbers but only uses the first two 11 0 Power Up When power is applied an LED on the power supply will illuminate The P Linc reads its setup switches and initializes its internal data The control port transmit LED will begin to flash and the receive LED will flash if the control port is wired properly to one or more SEA units One of the parallel port RDY bit LEDs will illuminate when valid data is on the parallel port 12 0 Parallel Communication Protocol The communication protocol between a P Linc and a control device e g programmable controller is relatively simple Nevertheless it is important that a logic designer for the control device be thoroughly familiar with the protocol 12 1 Transaction Steps All data messages originate at an SEA unit A set of messages in both directions is required for an SEA unit to deliver the data to the P Linc and receive assurance of its delivery The complete set of messages between an SEA Unit and the P Linc as well as the P Linc and the PLC is a data message transaction The key steps
25. n this multidrop configuration 1 eliminate the possibility of two SEA units attempting to transmit at the same time the P Linc repeatedly polls SEA units for data messages The communication mode of the SEA units must be poll mode and each unit must have a unique address The transmitter of each SEA unit must tri state when it is not transmitting 3 The parallel combination of impedances of the SEA units receivers must be high enough so that the line is not overloaded Because the SEA units transmitters are tri stated there are times when all the transmitters are in a high impedance state i e the state of the line is determined by conditions at the P Linc s receiver To insure that the state of the line is predictable in this circumstance the P Linc s receiver should include a passive biasing network A passive biasing network consists of three resistances one between 5VDC and the non inverting input one across the inputs and the third connected from the inverting input to DC ground This passive bias network is accomplished by turning on SWI 1 SWI 2 and SW1 3 see diagram above The P Linc s transmitter does not tri state therefore a passive bias network on the SEA units is not necessary Simple receiver termination of the last SEA unit on the multidrop line is recommended to reduce ringing and overshoot Note Since all multidropped SEA units receivers are in parallel only one receiver may be terminated with a simple termi
26. nation resistor Otherwise the line load will exceed tolerance levels 9 4 2 Shield Terminations and Auxiliary Port Simple Termination JB1 The jumper JB1 1 is provided to allow drain wire termination of the control port The control port serial communication cable s drain wire is typically connected to chassis ground at the P Linc because the P Linc side normally has a better ground Never connect a drain wire at both ends of a communication line The jumper JB1 2 is provided to allow drain wire termination of the auxiliary port 3 Filename P Linc User Manual R4 doc wp SMARTEYE n Control SMARTEYE P Linc User Manual Page 8 The jumper JB1 3 is provided to allow simple termination of the auxiliary port s receiver This jumper should be installed if the auxiliary port communication line is greater than 50 feet 10 0 SEA 8 and Twin Addressing The Smarteye P Linc connects up to 8 SEA 8s and or Twins on a single multidrop line The P Linc is able to distinguish one SEA 8 or Twin from another by its starting address Valid starting addresses for SEA 8s and or Twins are 00 10 20 30 40 50 60 and 70 octal The P Linc will ignore any other starting addresses SEA 8 and Twin addressing details can be found in their respective user manuals If the P Linc is configured for BCD mode the valid starting addresses are limited to 00 10 20 30 and 40 octal The P Linc will generate an error E52 reader number too b
27. of a data message transaction include the following 1 The P Linc selects the next SEA unit to poll from its on line list and sends a box poll command to that SEA unit 2 The SEA unit responds with a data message Filename P Linc User Manual R4 doc sMARTEYE in Control SMARTEYE P Linc User Manual Page 9 3 The P Linc sends a brief message back to the SEA unit acknowledging receipt of the data message 4 P Linc extracts data from the serial data message and establishes it on the parallel port 5 Once the data has settled on the data lines the P Linc will establish a new state for the data ready bits and write this new state to RDYO and RDY1 of the parallel output lines 6 Meanwhile the PLC which has been monitoring the data ready outputs of the P Linc recognizes the change in the data ready bits If the data ready bits are 01 or 10 then the PLC receives the remainder of the data from the parallel outputs and takes appropriate action Whatever the new pattern of data ready bits the control device sets data acknowledge bits to match 7 When the P Linc receives ACKO and ACK1 equal to RDYO and RDYI then the transaction is complete 12 2 Design Considerations A P Linc regardless of the speed of its output buffers cannot guarantee that all new output data will transition at the same instant In other words there is a short transient interval during which output data settles A PLC samples data pre
28. s data will be on line idle messages in response to the P Linc s box poll An example of this mode s output is shown below Check the Smarteye Twin and or Smarteye Electronic Assembly User s Manual for details on the serial communication protocol lt 10 gt Zfi lt 20 gt Zea lt 30 gt Zei 98 15 39 44 lt 02 gt 1 00504 02557 lt 20 gt Zea lt 30 gt Zei 98 15 40 29 lt 41 gt 10 T02S5Zcf Typical message formats are lt id gt Zzz On line ide Message hh mm ss ss lt id gt Lnnnnn TnnSnZzz Label Message hh mmiss ss lt id gt Enn TnnSnZzz Error Message Where lt id gt reader ID number octal a Filename P Linc User Manual R4 doc gt SMARTEYE In Control SMARTEYE P Linc User Manual Page 12 Zzz checksum hh mm ss ss timestamp hours minutes seconds since P Linc power up Note Timestamps appear only on non idle messages Lnnnnn Label field decimal Enn Error field decimal Tnn time field age of message Sn sequence number 0 to 9 Zzz checksum For a complete explanation of the time sequence and checksum fields refer to the Smarteye Electronic Assembly or Smarteye Twin User s Manual 14 3 Control Port Transmit Monitor SW2 7 on Data which is being transmitted from the P Linc is sent from the Auxiliary port in real time when this mode Is enabled Much of this data will be boxpoll messages from the P Linc An example of this mode s output is shown below Check the Smartey
29. sented by a P Linc at scattered instances in time including an instant during which the output lines of a P Linc are settling The steps of a data message transaction are designed to prevent a control device from receiving data that is sampled during a settling period In order to prevent this the transaction steps allow output data to settle before the data ready bits change Thus a control device should only receive data when it recognizes a change in the data ready bits There are four possible patterns of the two data ready bits 00 01 10 and 11 Only 01 and 10 are associated with usable data Thus a control device should receive data only when the data ready bits change and have a value of 01 or 10 This prevents a receipt of data during a settling period of the data ready bits when 00 and 11 are possible values There is only one instance in which data ready is deliberately set non transient to a value other than 01 or 10 At powerup when there is no data yet established for the parallel port the initial value of data ready is 00 The associated parallel data may be ignored by the control device as with any other instance of 00 for data ready A control device should reflect all values of data ready in its data acknowledge outputs even values of 00 and 11 A P Linc will not begin a new data message transaction until data ready of the previous transaction is matched by data acknowledge Filename P Linc User Manual R4 doc
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