Chapter 4 - PLC Communications:Ch 4_DL06
Contents
1. 6 pin RU12 Phone Port 1 Pin Descriptions 6 pin RJ12 Phone Port 2 Pin Descriptions Type Jack Power connection GND Type Jack Power connection GND Power connection Power connection 4 Receive data RS 232 Receive data RS 232 Transmit data RS 232 Transmit data RS 232 J No connection ea Request to send Power connection GND Power connection GND NOTE Both Com ports can provide 5 VDC however the 5 VDC power can be used only for the C more Micro Graphic panel AutomationDirect does not guarantee that the CLICK PLC will work correctly when any other device uses 5 VDC from these Com ports Please also remember these Com ports can provide enough power only for one C more Micro Graphic panel If you are going to connect a C more Micro Graphic panel to each Com port 2 panels in total you must obtain power from a separate 5 VDC power source for the second C more Micro Graphic panel Wiring Strategy The following pages cover five case scenarios for connecting com ports 1 or 2 to e Case 1 Connect Com Port 1 or 2 to a PC e Case 2 Connect Com Port 1 or 2 to another CLICK PLC e Case 3 Connect Com Port 2 to a C more or C more Micro Graphic panel e Case 4 Connect Com Port 2 to an RS 232 port on another device e Case 5 Connect Com Port 3 to an RS 422 or RS485 port on another device s 1 l 2 CLICK PLC Hardware User Manual 5th Editi2. 2 WM a0 k am oo A Bm ef tso a imal online Select the Function Navigation cc ee a ee tab then double click Com Port 3 Setup Prora Function PLO Sh CPU Configuration BB System Configuration AY Com Portl Setup 2P Gom Port Setup EP Gom Port3 Setup ak Scan Time a a Ae a Find the Basic Configuration section in the dialog box and set up the parameters to match the device connected to Port 3 Com Port Setup Details Port atts Protocol ASCII Basic Configuration 7 Wiring Details Select ASCII Node Address 1 247 l Port3 RS 485 Non isolation Set up the parameters to match the device connected t fi to Port 3 Soe Communication Data bit a Baud Rate bps 138400 tu Odd 3 pin Removable Terminal Parity Black Advanced Configuration Click the Help button for Com Port Setup ret ES Details online help IMPORTANT The communication port settings are saved in the project file The project must be transferred to the CLICK PLC in order for any port setting changes to take effect CLICK PLC Hardware User Manual 5th Edition CO USER M l H 2 5 Chapter 4 PLC Communications P 1 Modbus Slave Server Programming Ladder Program To use a CLICK PLC as a Modbus slave server you don t need any special ladder program Set up the communication port properly and you just need an
3. DV 1000CBL serial cable Port 1 or 2 V1 l L l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications Case 4 Connect Com Port 1 or 2 to an RS 232 port on another device You need to cross the RTD and TXD signal lines and connect OV on both com ports CLICK Com Port 1 or 2 RS 232 Port on Another Device OV RXD i 4 You can make your own cable However we offer two products that make your wiring much easier 1 ZIPLink feed through module and cable ZL RTB RJ12 RUN RUN ERR sTOP RTI ZL RJ12 CBL 2 eve CLICK Koyo pwr RUN RUN ERR W STOP PORTI ZL RJ12 CBL 2P CLICK PLC Hardware User Manual 5th Edition CO USER M 7 l 5 Chapter 4 PLC Communications Case 5 Connect Com Port 1 or 2 to an RS 422 or RS485 port on another device s You need a RS 232 to RS 422 485 converter in this case We recommend our FA ISOCON as the converter _ C0 00DD1 D Cable included with FA ISOCON Connect to RS 422 RS 485 ports on other devices The recommended cables to connect the FA ISOCON to other devices e Belden 8103 for the RS 422 e Belden 9842 for 2 wire RS 485 e Belden 9843 for 4 wire RS 485 H l 6 CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications W 2 Com Port 1 Ethernet Wiring Com Port 1 Ehternet supports 10 100 Base T Ethernet with an RJ 45 syle connector
4. Each register is reset to zero automatically when the com port receives a message from the Modbus master Then its value increments by 1 per second until the com port receives another message from the Modbus master If one of these registers has 60 as its value it means the com port has not received any message from the Modbus master for 60 seconds You can use this info to shut down the outputs on the slave CLICK PLC Here is an example program _Forti_Mo_co Reset the outputs Y001 to YOO6 mim_ Time m E041 m gg E Yo01 Erone RST END This contact is on when com port 1 has not received any message from the Modbus master for 60 seconds H2 6 CLICK PLC Hardware User Manual 5th Edition CO USER M Chapter 4 PLC Communications eee ee Modbus Addressing Each of the memory addresses in the CLICK X1 DS1 etc has a unique Modbus address This means the network master in the Modbus network can access any memory address in the slave CLICK PLC The best way to check which Modbus address is assigned to a particular CLICK memory address is to use the CLICK programming software Click the Program tab located in the Navigation window and double click Address Picker as shown below After the Address Picker window opens check the option Display MODBUS Address on the right bottom f CLICK Programming Software NewProjec i Fie Edit View setup Program Instruction ies an am FH ee a Ba i Nav
5. Port 1 Pin Descriptions Transmit Data Transmit Data Receive data Not connected Not connected Receive Data No connection No connection 8 pin RJ45 Phone Type Jack CO N OT B G PO You can use both straight and cross over cables with Com Port 1 Wiring Strategy e Case 1 Connect Com Port 1 to a device that supports Modbus TCP protocol directly such as a PC e Case 2 Connect Com Port 1 to other devices that support the Modbus TCP protocol via a switch or hub Case 1 Connect Com Port 1 to a device that supports the Modbus TCP protocol directly such as a PC In this illustration an Ethernet PLC unit is connected directly to a PC CLICK PLC Hardware User Manual 5th Edition CO USER M H l 7 Chapter 4 PLC Communications Case 2 Connect Com Port 1 to other devices that support the Modbus TCP protocol via a switch or hub i CLICK 3 CO 11ARE D My Koyo ron RUN e g ran stor Pom Wh a a a aN g s J NOTE Com Port 1 can communicate with any number of servers slaves using the Receive and or Send instructions However Com Port 1 can communicate with up to 4 servers at tthe same time If the ladder program has sent a message to 4 different servers and tries to send a message to another server the CLICK PLC unit disconnects the first se
6. PLC CHAPTER COMMUNICATIONS In This Chapter MOU CO oe oso ace tenet rates seareese eee E E E E E E 4 2 PLC Communication Ports Specifications cceeceescceeceeeseceesceeees 4 3 LED Satus Gl CAL ONS eener nn E NEE EE EE E 4 5 3 Steps to Using the CLICK PLC Communications 4 7 Typical Communications Applications essesseessessesssessesseessessesssess 4 8 W 1 Com Port 1 amp 2 RS 232 Wiring sessessesssssessessessessessessssses 4 12 WZ Com Pon o WINO seere NEEE EE 4 17 We Con POr 3 WINING cists te cece the coset ce secon reoicen entepetacntenesebenseeanen 4 20 C 1 Com Port 1 RS 232 Setup eseseesessessessessessessessessessessessesss 4 21 C 2 Com Port 1 Ethernet STUD vascnincecboscaroscnessensetncnscdvanatioweascnmiens 4 22 C 3 Com Port 2 Setup Modbus RTU essesseessesssessesssrssessesssesses 4 23 C 4 Com Port 2 Setup ASCII acess eecceres cemnzoneseepenerdeeatcceuseeneapeaed 4 24 C 5 Com Port 3 Setup Modbus RLU se cacee steerer cece onece enact ecste caten 4 25 C 6 Com Port 3 Setup ASCII Programming cscceeeeeeeeees 4 26 P 1 Modbus Slave Server PrograMmming csssscsssscssseeeseoes 4 27 P 2 Modbus Master Programming Modbus RTVU cceeceeee 4 30 P 3 Modbus Client Modbus TCP Programming scceeeee 4 32 P 4 ASCII Receive PrograMmMingG ccssceecceeectsceseetscesecesceeeees 4 36 P 5 ASCII Send Programmi
7. ims The Comm Port is not receiving data Port 1 2 amp 3 LED Status Indicators Standard and Analog PLCs PORT1 TX RX The Comm Port is sending data The Comm Port is not sending data Tx2 RO z PoRT2 M RS PORT3 FZ TX3 RX3 O L DirectLogic Devices That Do Not Work With CLICK PLCs The CLICK PLC does not support K sequence protocol so the following DirectLogic devices do not work with the CLICK PLC The Comm Port is receiving data 0j The Comm Port is not receiving data D4 HPP 1 CLICK PLC Hardware User Manual 5th Edition CO USER M a 5 Chapter 4 PLC Communications LED Status Indicators continued Port 1 amp 2 LED Status Indicators RL RUN Ethernet Basic PLCs Connected to the network eerie g ae PISNE LNK ACT i i pe i C0 10ARE D CLICK b ETHER 0J Disconnected from the network NET 100MBIT PORT2 i TxX2 Communicating at 100Mbps no Communicating at 10Mbps or RS 232 disconnected from the network The Comm Port is sending data The Comm Port is not sending data The Comm Port is receiving data 0 The Comm Port is not receiving data Port 1 2 amp 3 LED Status Indicators Connected to the network Gee Blink Ethernet Standard PLCs 0j Disconnected from the network H ERR STOP PORT1
8. PLC O Com Port 2 Setup f CPU Configuration Hoa I l GB System Configuration AF Gom Portl Setup 2Y Gom Port Setup 7 P Com Port3 Setup ak Scan Time eee See am a o am The Com Port Setup Details dialog box will come into view as shown below Com Port Setup Details Port M Protocol asci vi Basic Configuration wiring Details Select ASCII jod ddress 1 247 Set up the a Port2 R5 232 Non isolation paramers to match a 6 pin Female modular the device connected party Odd R12 phone jack to Port 2 Stop Bit 1 Communication Data bit a Advanced Configuration Make any adjustments here Click the Help button to eliminate com for Com Port Setup errors RTS OFF Delay 0 S000ms o Details online help RTS ON Delay 0 S000ms s Find the Basic Configuration section in the dialog box and set up the parameters to match the device connected to Port 2 The dialog box also has a section named Advanced Configuration You may need to make adjustments to these parameters to overcome communication errors which may occur IMPORTANT The communication port settings are saved in the project file The project must be transferred to the CLICK PLC in order for any port setting changes to take effect CLICK PLC Hardware User Manual 5th Edition CO USER M f H 2 3 Chapter 4 PLC Communications C 5 C 5 Com
9. 1 System Control Relays Address Nickname Description S C90 Port_1_Ready_Flag ON when Port 1 is ready 091 _Port_1_Error_Flag ON when Port 1 has a communication error C92 _Port_1_Clients_Limit ON when Port 1 is communicationg with 3 clients C93 _Port_1_IP Resolved ON when Port 1 obtains an IP address C94 Port_1_Link_Flag ON when Port 1 is connected to an Ethernet netwrok C95 _Port_1_100MBIT_Flag ON when Port 1 is communicationg at 100Mbps CLICK PLC Hardware User Manual 5th Edition CO USER M f H 3 3 Chapter 4 PLC Communications E Example Program The ladder program to use these Receive and Send instructions are easy You just need one NO Normally Open contact instruction to check if the com port is ready to receive or send data _FPot_1_Ready_Flag E scs40 _ When Com Port 1 is ready the Receive instruction is executed This also applies to the Send instruction Interlocking These instructions keep receiving or sending data when the enable input is on If you want to use more than one Receive and or Send instruction you need to be sure only one of the instructions is enabled at any point during the operation The technique to execute more than one Receive and or Send instruction in order is called Interlocking Here is an example of interlocking When this sample program is executed the Receive and Send instructions are executed alternatively
10. 100 3 Receive Data Protocol Modbus TCP 4 Not connected oo F Not connected 6 Receive Data 7 Not connected 8 Not connected Com Port 2 Specifications Default Port 2 mae Use Serial Saat 6 pin RJ12 Phone Port 2 Pin Descriptions Physical 6 pin RJ12 RS 232 Type Jack oe ener ee Communication speed baud 2400 4800 9600 19200 38400 57600 115200 J Receive data RS 232 Parity odd even none Transmit data RS 232 Station Address 1 to 247 Request to send ASG 8 bits Modbus RTU or 7 8 Power connection GND Protocol Modbus RTU master slave or ASCII in out Com Port 3 Specifications Default a Port 3 me Use Serial Communication Port 3 Pin Descriptions Physical 3 pin RS 485 3 Pin Signal A RS 485 Communication speed baud 2400 4800 Terminal Block mi Signal B RS 485 9600 19200 38400 57600 115200 Logic Ground 0 V Data length 8 bits Modbus RTU or 7 8 bits ASCII 8 bits top bit 1 2 Protocol Modbus RTU Modbus master slave or ASCII in out RTU H L CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications LED Status Indicators LED Status Indicators There are LED status indicators located to the left of each communication port to indicate port activity or communications Port 1 amp 2 LED Basic PLC Status Indicators The Comm Port is sending data ims The Comm Port is not sending data The Comm Port is receiving data
11. C100 is turned ON immediately when the CLICK PLC starts _Port_1_Ready_Flag executing the Receive instruction E Ssc90 Executed when E C100 C100 is OFF SET _Port_1_Ready_Flag B sc90 Executed when C100 is ON C100 RST END C100 is turned OFF immediately S when the CLICK PLC starts executing the Send instruction H 3 L CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications P 4 P 4 ASCII Receive Programming Instruction The Receive instruction allows the CLICK PLC to read ASCII message from an external device To use this instruction double click Receive in the Instruction List window as shown below Double click Receive in the Instruction List to use it in the ladder program Bx Instruction List A pe ee woe as Inetruction Contact Contact NO Contact HC Edge Contact Receive Send Select the Com Port that you are going to use and confirm the Protocol is ASCII Select the Com Port to use Com Port Port2 iw Protocol needs to ey eee be ASCII fo Data Setup n If the Protocol is not ASCH click the Com Port Setup button to open the Com Port Setup Details window and change the Protocol to ASCII If the Protocol selection is grayed out as shown below it means the Com Port is used by another Receive and or Send instruction in the ladder program You cannot change the Protocol setup until y
12. Disable DSi4 rw i rr 400014 03 06 16 No Disable XD ipsis rw linr 400015 03 06 16 No bist Check the option yp 1D516 Rw Ll ir 400016 03 06 16 No Disati en f0517 0s Rw 400017 03 06 16 Mo vist Display Modbus D518 rw E ir 400018 03 06 16 Mo fisat Address D519 rw iT 400019 03 06 16 No Disa J ps20 Rw Oir 400020 03 06 16 No Disable 4 4 27 Chapter 4 PLC Communications Exception Response Exception Code When the slave CLICK PLC receives a request from the Modbus master that it cannot respond to the slave CLICK PLC sends an exception response to the Modbus master The CLICK PLC supports the following Exception Responses Exception Response Exception Code Name Details of Exception Response Illegal Function ae PLC does not support the function code received from the MODBUS Illegal Data Address The MODBUS master tried to access to an invalid address The data length is zero or exceeds the maximum size Illegal Data Value The data for Write Single Coil is not FFOOh ON or 0000h OFF The PLC mode change request from the MODBUS master is not valid Password is locked When the PLC mode switch is in STOP position the MODBUS master Slave Device Failure requested to switch to RUN mode When the PLC mode switch is in RUN position the MODBUS master requested to switch to the Firmware Update mode H2 8 CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Co
13. Port 3 Setup Modbus RTU Before you set up the communication ports you must connect the PC with the CLICK programming software to the CLICK PLC Port 1 using a D2 DSCBL or EA MG PGM CBL programming cable Refer to Chapter 1 Getting Started for step by step instructions for this connection Once the PC and programming software are online with the CLICK PLC click the Function tab located in the Navigation window and double click Com Port 3 Setup as shown below i CLICK Programming Software NewProject5 ckp M Cy Fie Edit View Setup Program Instruction PLC Monitor jO do X me OO Rm e tat m m one Bo Naia J S a Cd Progen Function PLO a 7 CPU Configuration Ha l i System Configuration Select the Function tab then double click Com Port 3 Setup ly Gam Portl Setup a 27 Com Port2 Setup a EF Com Port Setup ak Scan Time a le en yia The Com Port Setup Details dialog box will come into view as shown below Com Port Setup Details Protocol Modbus Basic Configuration Wiring Details Select Modbus Node Address 1 247 1 Set up the parameters to match Baud Rate bps 38400 other devices in the Parity odd 3 pin Removable Terminal i Block same network Stop Bit 1 Port3 RS 485 Non isolation Advanced Configuration Time out Setting 500 ms Make any z Character Time out 2 1000ms 2 adjustments
14. here RTS ON Delay 0 5000ms 8 Click the Help button to eliminate com z errors RTS OFF Delay 0 S000ms e Response Delay Time 0 SO00ms 0 for Com Port Setup Details online help Find the Basic Configuration section in the dialog box and set up the parameters to match other devices in the same network The dialog box also has a section named Advanced Configuration You may need to make adjustments to these parameters to overcome communication errors which may occur IMPORTANT The communication port settings are saved in the project file The project must be transferred to the CLICK PLC in order for any port setting changes to take effect H2 L l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications C 6 C 6 Com Port 3 Setup ASCII Before you set up the communication ports you must connect the PC with the CLICK programming software to the CLICK PLC Port 1 using a D2 DSCBL or EA MG PGM CBL programming cable Refer to Chapter 1 Getting Started for step by step instructions for this connection Once the PC and programming software are online with the CLICK PLC click the Function tab located in the Navigation window and double click Com Port 3 Setup as shown below The Com Port Setup Details dialog box will come into view as shown below CLICK Programming Software NewProject5 ckp M Ci Fie Edit View Setup Program Instruction PLC Monitor
15. the Help button for Com Port Setup Details online help RTS ON Delay 0 5000ms 3 Od 49 eier lt Response Delay Time 0 SO00ms 0 Find the Basic Configuration section in the dialog box and set up the parameters to match other devices in the same network The dialog box also has a section named Advanced Configuration You may need to make adjustments to these parameters to overcome communication errors which may occur IMPORTANT The communication port settings are saved in the project file The project must be transferred to the CLICK PLC in order for any port setting changes to take effect u_22 CLICK PLC Hardware User Manual 5th Edition CO USER M Chapter 4 PLC Communications C 4 C 4 Com Port 2 Setup ASCII Before you set up the communication ports you must connect the PC with the CLICK programming software to the CLICK PLC Port 1 using a D2 DSCBL or EA MG PGM CBL programming cable Refer to Chapter 1 Getting Started for step by step instructions for this connection Once the PC and programming software are online with the CLICK PLC click the Function tab located in the Navigation window and double click Com Port 2 Setup as shown below CLICK Programming Software NewProject5 ckp M i Fie Edit View Setup Program Instruction PLC Monitor oga saha an ve a PA e a E Navigation an m Onire Select the Function j a a ae tab then double click TFroerat Function
16. 6 ckp Main Gy File Edit View Setup Program jainai logm laa x amj me eiria a A x Progra Function PLO f A j E BE CPU Configuration __ Selecct the Function tab tit System Configuration then double click Com L LF Com Port Setup Prort 1 Setup 29 Com Port Setup 2 i F Com Port3 Setup 9 Scan Time ks E The Com Port Setup Details dialog box will come into view as shown below Com Port Setup Details Port Porti v Protocol Modbus Network Address Configuration Wiring Details Obtain Address From DHCP Use the following IP Address Port1 Ethernet Non isolation i oY T Setup the parameters to match your application 8 pin female modular RJ45 07 78 E TN Oe De Boe SB Configuration as Cent Master 1 Timeout 0 30000ms 1000 ms Retries 0 10 2 8 Click the Help Server Inactivity Tmeout 0 3600sec 60 sec hote button for online Configuraion as Server Slave THa part aeria ata Com Port Setup TCP Port Number 0 65535 502 Details help Maximum Concurrent Sessions Client Inactivity Timeout 0 3600sec NOTE The communication port settings are saved in the project file The project must be transferred to the CLICK PLC in order for any port setting changes to take effect CLICK PLC Hardware User Manual 5th Edition C0 USER M l H 2 l Chapter 4 PLC Communications C3 C 3
17. C 1 Com Port 1 RS 232 Setup Com Port 1 has a fixed setup as shown below This com port works as a Modbus RTU slave only If you want to connect an external device to this com port please make sure the external device can be a Modbus RTU master and that the com port setup matches the following setup Com Port Setup Details Port Sida a Basic Configuration Node Address 1 247 Baud Rate aps Parity Protocol Modbus Wiring Details L Portl BS 232 Non isolation Se 400 6 pin Female modular Sate RI12 phone jack Stop Bit 1 Communication Daka bith amp advanced Configuration Time out Setting Character Time out 7 1000rms BTS ON Delay 0 S000ms1 RTS OFF Delay 0 S000ms Response Delay Time 0 SO00m s H2 0 i CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications C 2 C 2 Com Port 1 Ethernet Setup Wiring Strategy Before you set up this communication port you must connect a PC loaded with CLICK programming software to the CLICK PLC Port 1 using an Ethernet cable or to the CLICK PLC Port 2 using a D2 DSCBL or EA MG PGM CBL programming cable Refer to Chapter 1 Getting Started for step by step instructions on this connection Once the PC and programming software are online with the CLICK PLC select the Function tab located in the Navigation window and double click Com Port 1 Setup as shown below 4 Gi cuc Programming Software NewProject
18. Com Port 2 Setup Modbus RTU Before you set up the communication ports you must connect the PC with the CLICK programming software to the CLICK PLC Port 1 using a D2 DSCBL or EA MG PGM CBL programming cable Refer to Chapter 1 Getting Started for step by step instructions for this connection Once the PC and programming software are online with the CLICK PLC click the Function tab located in the Navigation window and double click Com Port 2 Setup as shown below i CLICK Programming Software NewProject5 ckp M i Fie Edit View Setup Program Instruction PLC Monitor oo tala Oo xam vea pme a a ma nine m nwn a l Select the Function tab then double click Com Progra Function PLO Port 2 Setup 3 38 CPU Configuration BB System Configuration F Com Portl Setup ay Gam Port2 Setup 27 Gam Port3 Setup ak Scan Time ee Com Port Setup Details Port GETS Protocol Modbus Basic Configuration Wiring Details Select Modbus Node Address 1 247 1 Set up the Se aaeas Port2 R5 232 Non isolation parameters to match wots ie al lt 6 pin Femal dular other devices in the Parity Oda eaea same network Stop Bit 1 v Advanced Configuration M kean Time out Setting 500 ms y Character Time out 2 1000ms z adjustments here to eliminate Com n errors RTS OFF Delay 0 S000ms 0 Click
19. End instruction in the ladder program to put the PLC in Run mode a However you can add any additional ladder program to let the slave CLICK PLC control something by itself For instance you may want to shut down the outputs on the slave server CLICK PLC should it lose communication with the Modbus master client Note The Modbus master can communicate with the Modbus slave CLICK PLC without any ladder program However output points on the Modbus slave CLICK PLC cannot be turned on if the PLC is not in the Run mode Because of this we recommend having at least one End instruction and to put the PLC in Run mode Lost Communication Situation You may want to detect if there is something happening at the Modbus master side that stops communication with the Modbus slaves Or the communication cable might have been disconnected In this situation you may want the Modbus slaves to take an action For instance you may want to shut down the outputs on the slave CLICK PLC when the communication with the Modbus master is lost We offer an easy method to accomplish this The CLICK keeps counting how long it has been since each com port received a message from the Modbus master and enters the time duration in the following system data registers System Data Registers System Data Register Nickname Range SD41 _Porti_No_Comm_Time 0 32767 sec SD51 _Port2_No_Comm_Time 0 32767 sec SD61 _Port3_No_Comm_Time 0 32767 sec
20. LNK ACT _ Se Communicating at 100Mbps FIER t marerena C d Communicating at 10Mbps or TURAL Il CL gt disconnected from the network PORT2 1x2 Rx2 RS 232 mm The Comm Port is sending data The Comm Port is not sending data SONS SOAGNEROAR SU RERE The Comm Port is receiving data The Comm Port is not receiving data 7 6 CLICK PLC Hardware User Manual 5th Edition CO USER M Chapter 4 PLC Communications 3 Steps to Using the CLICK PLC Communications We offer an easy 3 step method for using the communication features of the CLICK PLC Com Port Setup Pages Programming Pages Use the table below to locate information on communications for your particular application As you can see in the table each step has subcategories For each step find the subcategory description that best describes your application Use the subcategory references W x C x and P x to find more information on these topics in this chapter See the example below The following pages show the devices that you may connect to the CLICK PLC Com ports 4 CLICK PLC Communications Subcategory Reference W 1 Com port 1 amp 2 RS 232 W 2 Com port 1 Ethernet W 3 Com port 3 RS 485 Com port 1 RS 232 setup Com port 1 Ethernet setup Step 2 Com port 2 setup Modbus RTU Com Port Setup Com port 2 setup ASCII Com port 3 setup Modbus RTU Com port 3 setup ASCII Modbus Sla
21. Use Serial Communication Physical 3 pin RS 485 3 Pin Communication speed baud 1200 2400 Terminal Block 4800 9600 19200 38400 57600 115200 Port 3 Parity odd even none Station Address 1 to 247 Data length 8 bits Modbus RTU or 7 8 bits ASCII LG Stop bit 1 2 Protocol Modbus RTU Modbus master slave or ASCII in out RTU Receive data RS 232 Transmit data RS 232 No connection Power connection GND Port 2 Pin Descriptions Power connection GND Power connection Receive data RS 232 Transmit data RS 232 Request to send Power connection GND Port 3 Pin Descriptions Signal A RS 485 Signal B RS 485 Logic Ground 0 V CLICK PLC Hardware User Manual 5th Edition CO USER M 7 a 3 Chapter 4 PLC Communications PLC Communication Ports Specifications continued Ethernet Basic PLC Ethernet Standard PLC Com Port 1 Com Port 1 Com Port 2 4 Com Port 2 Com Port 3 Com Port 1 Specifications Port 1 Use Programming and Ethernet Communication 8 ae ne r Transmit Data Physical 8 pin RJ45 Ethernet 22 2 Transmit Data Communication Speed Mbps 10
22. ations SS S Reader System Data Register SD50 4 M stores the number of received SD50 3 characters for Port 2 TXT1 A TXT2 B TXT3 C Example 2 Retrieve numerical data from the received ASCII message When numerical data is included in the received ASCII message you may want to retrieve the numerical data and copy into a data register The Copy instruction can be used for this purpose In this example recetved ASCII message is stored in TXT1 to TXT6 This ASCII message includes a numerical data 1 23 as ASCII characters from TXT3 to TXT6 The Copy instruction converts those ASCII characters into the equivalent numerical data and copies into data register DF1 cio TXT1 A TXT3 1 Converted amp Copied TXT4 y H 13 TXT5 2 TXT6 3 CLICK PLC Hardware User Manual 5th Edition CO USER M f H 3 7 Chapter 4 PLC Communications P 5 ASCII Send Programming Instruction The Send instruction allows the CLICK PLC to send ASCII messages to an external device To use this instruction double click Send in the Instruction List window as shown below E Bx Instruction List x Double click Send in the Instruction List to use it in the A Aan E EOLO E ladder program Rung Comments Goil Areg Oo o Instruction List j hetructiorn End Ill Contact Fi eT Contact Ha i CEIVe Contact HC Send HH Edee Contact ree Select the Com Port that you are
23. data between itself and any connected slave device There can only be one master on the network When the CLICK PLC is the master it is easily identified It will be the PLC in the network with the Send and or Receive instructions using the Modbus protocol in its ladder logic program H2 l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications PLC Communication Ports Specifications The CLICK PLC units have two or three built in communications ports Basic PLC Standard and Analog PLCs gt _ Com Port 1 Com Port 1 Com Port 2 Com Port 2 Com Port 3 Com Port 1 Specifications Port 1 Use Programming Port 6 pin RJ12 Phone Physical 6 pin RJ12 RS 232 Type Jack Port 1 Pin Descriptions Power connection GND Power connection Communication speed baud 38400 fixed Parity Odd Station Address 1 Data length 8 bits Stop bit 1 Protocol Modbus RTU slave only 6 Com Port 2 Specifications Default Port 2 Use Serial Communication 6 pin RJ12 Phone Physical 6 pin RJ12 RS 232 Type Jack Communication speed nee 1200 2400 4800 9600 19200 38400 57600 115200 Parity odd even none Station Address 1 to 247 Data on 8 bits Modbus RTU or 7 8 bits ASCII Stop bit 1 2 Protocol Modbus RTU master slave or ASCII in out Com Port 3 Specifications
24. er 4 PLC Communications P 3 p 3 Modbus Client Modbus TCP Programming Instructions The CLICK PLC has two instructions to exchange data with Modbus servers through the Com Port 1 the Receive and Send instructions e Receive instruction Read data from external Modbus server e Send instruction Write data to external Modbus server s To use these instructions double click Receive or Send in the Instruction List window as shown below Instruction List Double click Receive or Send in the instruction List to use it F w te Al fo th a in the ladder program Rune Comments Coil Area A Instruction List x S B ins oe ion Lis fw End Instruction b PrE eRe Contact aii Receive HH Contact NO sol Send ae Contact NO Edge Contact Dene Ps etc eee os Select Com Port 1 that you are going to use Receive e Select Com Port 1 ee a m Protocol MODBUS Receiving Data Setup eT FT U3 2 CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications When you open the Receive or Send instruction in the Modbus mode their windows should look like this For the explanation of each setup parameter please click the Help button on the bottom right Click the Help button to get detailed information on this setup window Com Port Status Indicators The CLICK PLC has the following System Control Relays to indicate the status of Com Port
25. figurable from the programming software Port 3 can be used as a Modbus RTU master or slave protocol device or handle ASCII data In or Out CLICK Ethernet Basic and Standard PLC units have one built in Ethernet communications port and one RS 232 serial communication port Additionally Ethernet Standard PLC units have an RS 485 port The CLICK PLC can be networked to other CLICK PLCs data input devices barcode readers weight scales etc and or data output devices serial printers serial text displays etc It is also possible to network the CLICK PLC to other 3rd party PLCs and devices that have the ability to communicate using the Modbus RTU protocol The final part of the PLC Communications chapter contains explanations and examples of the various ways the Send and Receive programming instructions can be used to perform Modbus RTU protocol and ASCII data communications between devices There are three different data addressing types that can be selected when using the Modbus RTU protocol from the Send and Receive instructions They are CLICK addressing Modbus 984 addressing or Modbus HEX addressing The CLICK addressing makes it convenient to exchange data between CLICK PLCs The other addressing choices are selected based on the Modbus protocol addressing the networked devices are using For details on the Modbus protocol visit www modbus org NOTE The Modbus RTU Master is identified as the device that controls the exchange of
26. going to use and confirm the Protocol is ASCH Select the Com Port to use Protocol needs to Protocol ASCII COM Port Setup be ASCII If the Protocol is not ASCH click the Com Port Setup button to open the Com Port Setup Details window and change the Protocol to ASCII If the Protocol selection is grayed out as shown below it means the Com Port is used by another Receive and or Send instruction the ladder program You cannot change the Protocol setup until you delete those instructions Com Port Setup Details ery ot x Protocol Wiring De tails Basic Configuration H 3 8 l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications When you open the Send instruction in the ASCII mode the window should look like this For the explanation of each setup parameter please click the Help button on the bottom right Com Port Port Mi Protocol ASCII COM Port Setup Sending Data Setup Static Text Message MAX 128 characters Possible Message Length 0 Embedded ASCII Code Embedded Memory Address Dynamic Text Message MAX 128 characters Click the Help button Freeman Code Character TEE to get detailed 1 00 2 ASCII Table information on this setup window F Byte Swap i All But null Skatus Flags Sending ies SUCCESS Example Send ASCII message to a serial prin
27. h ports then at least one of the panels must be powered by a C more Micro DC power adapter EA MG P1 or EA MG SP1 or another 24 VDC power source Color C more Micro Graphic panels must also be powered from a separate 24 VDC source H 8 l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications Port 1 Ethernet Modbus TCP Modbus TCP Client Master Devices N fa A A gt C0 11DD1E D quay 1 Koyo k C0 11DD1E D g CLICK gt a ghey page g iti IR RS485 PORTS a na E ct 3 r Another CLICK Ethernet PLC Other Devices Supporting All Ethernet PLCS Modbus TCP Client Mode C more Panel pia a Pt Modbus TCP Server Slave Devices ViewMarg Display POES EH EERI EE p mall SR55 Soft Starter GS1 Drive Other Devices Supporting Another CLICK a Modbus TCP Server Mode Ethernet PLC q w 2 c2 P23 GS3 Drive CLICK PLC Hardware User Manual 5th Edition CO USER M H 9 Chapter 4 PLC Communications Port 2 RS 232 Modbus RTU or ASCII Modbus RTU C0 11DD1E D CUICKY E 1 E J LALIN TU SAGGNEGHS All PLCS PC Another CLICK PLC See Note on previous page about connecting a C more Micro Graphic panel to RS 232 Port Other Devices C more and C more Supporting Modbus RTU Micro Graphic Panel Master Mode Barcode wa e P 1 w 1 c 4 P4 M
28. igation x Program Function PLC tad Ladder Program a Main Program ed Subroutine Program la Interrupt Program 4 Address Picker gf Edit Rune Comments Select the Program tab then double click Address Picker Address Picker Edit Mode Fill Down Nickname Find w iid josta ee MODBUS Address Function cade These are the Modbus DS1 TO rw iinr row ut rw ob rut rw LI Int rw LB rr 400001 03 06 16 400002 03 06 16 400003 03 06 16 400004 03 06 16 400005 03 06 16 400006 03 06 16 400007 03 06 16 Data Type Filter Used Unused Address Display All Data Types T tea i Ttec words Display both used and unused MODBUS 984 Addressing ae ha pe A Eg Di HEX JY Floating Point Ra Denar melted O MODELS HEX Addressing Bit Text Display only unused addresses The numbers in the parenthesis indicate which function codes can be used for each memory address Disable gt Display MODBUS Address CLICK PLC Hardware User Manual 5th Edition CO USER M DSS rw LD it 400008 03 06 16 No Disable D59 Rw liT 400009 03 06 16 Mo Disable os D510 rw iinr 400010 03 06 16 Mo Disable DD ffos11 rw iT 400011 03 06 16 Mo Disable pH D512 uw int 400012 03 06 16 No Disable pp os13 rw iNT 400013 03 06 16 Mo
29. mmunications P 2 Modbus Master Programming Modbus RTU Instructions The CLICK PLC has two instructions to exchange data with external Modbus devices through the com ports the Receive and Send instructions e Receive instruction Read data from an external Modbus device e Send instruction Write data to external Modbus device s To use these instructions double click Receive or Send in the Instruction List window as shown below Select the Com Port to use Protocol needs to be MODBUS Instruction List Double click Receive or Send in the Instruction List to use it in the ladder program Contact HH te ontact EHG Ez Ae Contact CHC Receive Send Com Port Port2 i Protocol MODBUS CoM Port Setup 1a kig Data If the Protocol is not MODBUS click the Com Port Setup button to open the Com Port Setup Details window and change the Protocol to MODBUS If the Protocol selection is grayed out as shown below it means the Com Port is used by another Receive and or Send instruction in the ladder program You cannot change the Protocol setup until you delete those instructions Com Port Setup Details Grayed out Port Port2 lw Protocol Basic Configuration Wiring De tails CLICK PLC Hardware User Manual 5th Edition CO USER M f 4 29 Chapter 4 PLC Communications When you open the Receive or Send instruction in the Modbus mode their windows should l
30. ng seessessssssessessecssessecssesssrssessessseess 4 39 Chapter 4 PLC Communications Introduction This chapter explains the communications ability of the CLICK PLC system for exchanging data between the PLC unit and other connected serial devices It covers e Electrical connections used for communications e Networking routing between the PLC and other devices e Setting the port communication parameters e Selecting the protocols and the available data addressing types to use and e Ladder logic program instructions that make it all work together CLICK Basic and Standard PLCs have two built in RS 232 ports Both ports are 6 pin RJ12 phone type jacks Port 1 communication parameters are fixed and is used primarily as the programming port Port 1 can also be used as a Modbus RTU protocol slave device Port 2 is a general purpose port user configurable with its communication parameters within CLICK Programming Software CO PGMSW Port 2 can be used as a Modbus RTU master or slave protocol device or handle ASCII data In or Out ASCII stands for American Standard Code for Information Interchange and defines a character encoding method for text that is used in computers and other communication devices Details can be found by doing a search for ASCII on the internet Standard and Analog PLC versions also have a 3 pin RS 485 port Port 3 Like Port 2 Port 3 is a general purpose port with its communication parameters being user con
31. odbus RTU Slave Devices Devices that RECEIVE ASCII messages ASCII Devices that SEND ASCII messages Other devices that can send ASCII data Weight Scale Other Devices Supporting Modbus RTU Slave Mode Other devices that can receive Serial Text ASCII data Another CLICK PLC Display c4 3 ra V1 a l 0 l CLICK PLC Hardware User Manual 5th Edition C0 USER M Serial Printer Chapter 4 PLC Communications Port 3 RS 485 Modbus RTU or ASCII Modbus RTU 232 RS RS 485 PORTS r ne wa w N i Another CLICK PLC Standard Analog and Ethernet PLC ASCII Devices that SEND ASCII messages Other Devices C more and C more Supporting Modbus RTU Micro Graphic Panel Master Mode Other devices that can send ASCII data Barcode Reader ws cs P Devices that RECEIVE ASCII messages Weigh Scale Other Devices Supporting Modbus RTU Slave Mode Other devices that can receive Serial Text ASCII data Display Another CLICK PLC SOLO Temperature Serial Printer Controller ws cs Ps ws cs P2 CLICK PLC Hardware User Manual 5th Edition CO USER M f 7 l l Chapter 4 PLC Communications W 1 Com Port 1 amp 2 RS 232 Wiring Com Port 1 and Com Port 2 have very similar pin layouts the only difference is that Port 2 has a RTS signal output which Port 1 does not have
32. on C0 USER M Chapter 4 PLC Communications Case 1 Connect Com Port 1 or 2 to a PC You can connect Com Port 1 or 2 to a serial com port or USB port on the PC 1 Connect to a serial port PC Serial Programming Cable D2 DSCBL 2 Connect to a USB port PC to Panel Programming Cable Assembly Includes serial amp USB cables EA MG PGM CBL CLICK PLC Hardware User Manual 5th Edition CO USER M f H l 3 Chapter 4 PLC Communications Case 2 Connect Com Port 1 or 2 to another CLICK PLC DO CBL Cable You can use cable DO CBL In this configuration one of the CLICK PLC units needs to be the network master and the other is the network slave Connect the DO CBL on Com Port 2 on the master PLC unit side Warning The ZL RJ12 CBL 2 cable cannot be used for this purpose Case 3 Connect Com Port 1 or 2 to a C more or C more Micro Graphic panel Please use the following cables to make your connections C more Graphic Panel Cable Part Number C more Touch panels EA 2CBL 3m or OP 2CBL 2m DV 1000CBL if the panel receives 5 VDC power from the CLICK PLC com port Monochrome C more Micro Graphic panels only color panels must be powered from a separate 24 VDC power source Please refer Panels to the note on page 4 6 for details EA 2CBL 3m or OP 2CBL 2m if the panel receives 24 VDC power from other source C more Micro Graphic Panel Monochrome models only Port 1
33. ook like this For the explanation of each setup parameter please click the Help button on the bottom right Receive Send ComPort Portz w Com Port Panam rots NODBLE motors MODUS Receiving Data Setup Sending Data Setup Slave ID 0 247 0 m slave ID 1 247 i a 0 247 Modbus Function Code 01 Read Coil Status Modbus Function Code 05 Write Single Coil x Addressing Type Modbus 984 Addressing ee oS Ta Starting Slave Address v 000001 to 065535 Starting Slawe Address wv 00000 i to 065535 Starting Master Address v Number of Bits 1 Starting Master Address wv a Click the Help button Status Flags to get detailed Receiving v A information on this Success v l setup window Error wT Exception Response Error Code wT Status Flagg Success wW m Error vw Exception Response Error Code NI Loox cme r Com Port Status Indicators The CLICK PLC has the following System Control Relays to indicate the status of the Com Ports System Control Relays Address Nickname Description SC100 _Port_2_Ready_Flag On when Port 2 is ready SC101 _Port_2_Error_Flag On when Port 2 has a communication error SC102 _Port_3_Ready_Flag On when Port 3 is ready SC103 _Port_3_Error_Flag On when Port 3 has a communication error Example Program The ladder program to use these Receive and Send instructions are ea
34. ou delete those instructions Com Port Setup Details Grayed out Wiring De tails CLICK PLC Hardware User Manual 5th Edition CO USER M f u 3 5 Chapter 4 PLC Communications When you open the Receive instruction in the ASCII mode the window should look like this For the explanation of each setup parameter please click the Help button on the bottom right Receive Com Porti Port2 Ia Receiving Data Setup Data Length Type Fixed variable Data Length Data Destination A L Byte Swap t Timeout First Character None w Character Interwal None Click the Help button Status Flags to get the detailed information of this Receiving wv m Saree wv Leal setup window First Character Time out First Err WW m Character Interval Time out Inter Err 7 lial Overfiow wv liii Recived Data Length SD50 Ca Example 1 Read ASCII message from a barcode reader With the following example program when C1 is ON the Receive instruction is activated and Com Port 2 waits for an ASCII message from the barcode reader When Com Port 2 receives an ASCII message and it includes the termination character CR Carriage Return in this example C2 is turned on and the received ASCII message is copied to TXT1 address First Timeout Byte Swap Terminate Code Destination U3 6 i CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communic
35. rver and establishes a connection with the new server maintaining a total of 4 servers communication with Com Port 1 while it is communicating with 3 clients the CLICK PLC unit replies with i NOTE Com Port 1 can communicate with up to 3 clients masters If a client attempts to establish an error to the forth client V1 l 8 l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications W 3 W 3 Com Port 3 Wiring Com Port 3 supports 2 wire RS 485 3 Pin Terminal Block Port 3 Pin Descriptions plus Signal A RS 485 Signal B RS 485 LG Wiring Strategy You need to connect all signal terminals in the network together You will also need to minus LG Logic Ground 0 V connect all signal terminals together It is optional to connect the logic ground CLICK Com Port 3 RS 485 Porton RS 485 Porton another device another device Add a termination resistor between the and terminals on A the last device Optional ee devices may not have this terminal Add a termination resistor between the and terminals on Port 3 NOTE The resistance of the termination resistors needs to match the impedance of the communication cable NOTE Use a repeater if connecting more than 32 slaves to Port 3 CLICK PLC Hardware User Manual 5th Edition CO USER M f H 19 Chapter 4 PLC Communications C 1
36. sy You just need one NO Normally Open contact instruction to check if the com port is ready to receive or send data _ Port Ready Flag Slave ID Bscioo Modbus Function Code Slave Addr When Com Port 2 is ready the Receive instruction is executed This also applies to the Send instruction U3 0 l CLICK PLC Hardware User Manual 5th Edition C0 USER M Chapter 4 PLC Communications Interlocking These instructions keep receiving or sending data when the enable input is on If you want to use more than one Receive and or Send instruction you need to be sure only one of the instructions is enabled at any point during the operation The technique to execute more than one Receive and or Send instruction in order is called Interlocking When the Interlocking sample program below is executed the Receive and Send instructions are executed alternatively C100 is turned ON immediately when the CLICK PLC starts executing the Receive instruction Receive Port Slave ID 1 Modbus Function Code Port Ready Flag EBscio0 E 100 Executed when ae C100 is OFF i t y SET E Port Ready Flag B Scio Eciod Executed when C100 is ON C RST C100 is turned OFF immediately when the CLICK PLC starts executing the Send instruction CLICK PLC Hardware User Manual 5th Edition CO USER M f H 3 l Chapt
37. ter With the following example program when status of C1 changes from OFF to ON the Send instruction sends ASCII message ABC and the termination character CR Carriage Return in this example C2 is turned on when sending the ASCII message is completed m Terminate Code CR Suecess Send Message AH p CLICK PLC Hardware User Manual 5th Edition CO USER M f H 3 9 Chapter 4 PLC Communications Notes u 40 l CLICK PLC Hardware User Manual 5th Edition C0 USER M
38. ve Server programming Step 3 Modbus Master programming Modbus RTU Modbus Client programming Modbus TCP ASCII Receive programming ASCII Send Subcategory Description Programming Example To connect a barcode reader that sends ASCII data to Com Port 2 Refer to these three reference page sections Barcode Reader Com Port 2 CLICK PLC Hardware User Manual 5th Edition CO USER M W 7 Chapter 4 PLC Communications Typical Communication Applications The diagrams on the following four pages illustrate the typical uses for the CLICK PLC s communication ports Typical serial communication applications are continued on the next three pages Port 1 RS 232 Modbus RTU Slave Mode Only PWR RUN ERR PORTI RX1 7X2 RX2 PORT2 Another CLICK PLC amp more and C more Micro Graphic Panel Basic Standard and Other Devices Analog PLCs Supporting Modbus RTU Master Mode C more Micro Graphic panels monochrome models only can get 5 VDC power from RS 282 Port C more Micro Graphic Panel Monochrome models only Example Port 1 The Color Micro Graphic panel or the second Monochrome Micro Graphic ee panel needs a separate 24 VDC power SENA CANE source see the note below RS 232 Port NOTE CLICK s RS 232 port can provide 5 VDC to power one monochrome Micro Graphic panel If two C more Micro Graphic panels are connected to bot
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