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1/16/2011 6:16 AM | |
Posts: 41 Rating: (1) |
hi, I am using S7-200(cpu-226) for the modbus communication with PC(visual basic).but i dont know how to communicate that PC with PLC using modbus. From forum i got the sample program for send and receive data to and from pc. i uploaded that program plz check ones. I downloaded that program to the plc but i dont know how to check whether the communication is happend or not. because i dont know visual basic program but that visul basic program is in client scope. the process is, i have to send one bit to PC while process is going on.after getting that bit the client who is in control room will calculate some formula and he again going to send one bit(pass/fail) to PLC. using that bit i have to proceed my remaining process. now i want to know how can i send or receive a bit to or from PC using modbus. in PC how they will get that bit. did any other software like(hyper terminal) will help check this communicaton?if yes how? plz help me..... Attachmentmodbus.zip (1560 Downloads) |
1/16/2011 1:21 PM | |
Posts: 41 Rating: (1) |
sir, how to do that modscan program, you have any sample program?plz guide me, |
1/18/2011 8:40 AM | |
Posts: 41 Rating: (1) |
hi i tried with modscan.but i think modscan will act as master, but in my plc program i am using modbus master,so i think it is not communication. whether i have to use modbus slave library in plc program??? Attachmentmodbus.zip (878 Downloads) |
Last edited by: suvarn at: 1/18/2011 8:43 AM |
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5/13/2014 7:38 AM | |
Posts: 340 Rating: (6) |
new question is splittet to How to install? S7-200 (MODBUS). |
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