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Modbus communication

Created by: kiran p at: 3/2/2013 8:18 PM (4 Replies)

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3/2/2013 8:18 PM	Rate (0)
kiran p Posts: 86 Rating: (2)	I have IM151-8 PN/DP CPU and Eurotherm device 2604. I want to make modbus communication between these two. How to make modbus communication between thsese two. For modbus communication any special blocks are there or what. Please help me.
kiran p Posts: 86 Rating: (2)
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3/3/2013 2:42 AM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 6/8/2023 Posts: 12037 Rating: (2596)	Hello kiran; The ET 200S module you require is the 1SI electronic module:single serial interface (RS-232/RS-422/RS-485) for Modbus RTU or USS protocol. Part number 6ES7138-4DF11-0AB0. In the following link you will find the required function blocks for Modbus RTU, along with samples of the code: Function Blocks, Examples and User Manuals of the Serial Interface ET200S 1SI Here is the manual for the 1SI, including a chapter on Modbus RTU: SIMATIC ET 200S Serial interface modules Hope this helps, Daniel Chartier

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3/3/2013 9:27 AM	Rate (0)
kiran p Posts: 86 Rating: (2)	Dear sir, I already have the 6ES7 138-4DF11-0AB0. But i dont know how to make program for modbus communication. For modbus communication any special function blocks is there means please send. How to send and recieve data through modbus.
kiran p Posts: 86 Rating: (2)
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3/3/2013 7:21 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	In Daniel's post all available infoi is mentioned. Try it there. Eventually later on we can discuss errors which are received... best regards, Hristo Mihalev

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3/4/2013 3:40 PM	Rate (2)
Eastern Posts: 557 Rating: (64)	Hello, Hope this attached ppt could help you. I would suggest first try your mondule with modsim/modscan software so that you will be able to find problem wheather it is a connection problem or setting problem. Refer link.... /tf/WW/en/Posts/44769 Attachment ET200s_Modbus_Master_slave_ppt.zip (67 Downloads)
Eastern Posts: 557 Rating: (64)	Last edited by: Eastern at: 3/4/2013 4:20 PM
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