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Modbus on both ports

10/26/2010 9:07 AM	Rate (0)
sh.m. Posts: 16 Rating: (0)	Hello everybody I have a CPU226 and I want to have modbus protocol on both port0 and port1,is there anyone who has done it before or who can help me about it?(I have a modbus library for port0 and one for port1,but when I try to use them in one program,I get SF error,but I can have modbus on one of these two ports separately) Thanks Shahed
sh.m. Posts: 16 Rating: (0)
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10/26/2010 9:26 AM	Rate (0)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 7/24/2025 Posts: 2957 Rating: (243)	Hello, I've made little test in my computer and I am able to configure both ports for modbus. Please check if you meet all requirements mentioned in S7-200 system manual chapter 12. Also please keep in mind that you can only use Modbus slave on port 0 and you can't use both ports for slave communication. Also check free available memory as mentioned in system manual.
	Best regards, Darius
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8/18/2015 11:35 AM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4760 Rating: (122)	New question published by yasin10112 is split to a separate thread with the subject Modbus slave libraries for port 0(cpu 224). Best regards Min_Moderator

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