9/2/2017 3:11 PM | |
Posts: 11 Rating:
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Hi Everyone, I am using IM151-7 CPU with 6ES7138-4DF11-0AB0 modbus .communication. I have connected five Slave Devices,but from Three Slave Devices i am getting the correct value last two is not giving the correct value. So I just Want to Know How Many Slave device can be connected to a Master 6ES7138-4DF11-0AB0. ------------------------------------------------------------------------------------------ |
Last edited by: dchaurasia at: 9/2/2017 3:12:03 PMLast edited by: The Helping Hand at: 9/4/2017 4:17:01 PMNew subject after splitting |
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9/4/2017 4:28 PM | |
Joined: 9/27/2006 Last visit: 8/4/2024 Posts: 12273 Rating:
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Hello dchaurasia; From the manual for your serial comms module: SIMATIC ET 200S Serial interface modules Terminal assignment for RS 485 communication You can use a master system to set up a multi-endpoint connection (network) with up to 32 slaves. So your problem is not a number of slave limitation issue. Please show us your code , illustrating all 5 calls of the Modbus master functions, one for each slave, and the way you set them up to move from one slave to the next when they have finished processing the data. Hope this helps, Daniel Chartier |
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