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FAQ Category: Modbus

Do All Software Blocks Have a Modbus Address?

No, not all blocks have a direct Modbus address. For example On-Delay Timer setting does not have a direct address. However, you can use another reference block in your program to store the timer setting such as an AF or Counter block, which do have direct Modbus addresses.

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Can CPU Act as a Modbus Master and Slave at the Same Time?

Yes, the CPU can act as both a Modbus Master and Slave at the same time. For example you may connect the CPU via RS232 programming lead to one of our HMI’s, and set it to act as a Modbus RTU Slave. At the same time, you could have an RS485 expansion module attached to […]

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Can the CPU be a Modbus Master?

Yes, by use of the Modbus Read and Modbus Write blocks in the programming software.

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Do the CPU’s Support Modbus Protocol?

Yes, all the CPU’s in our range support Modbus RTU protocol as standard. Ethernet CPU’s also support Modbus/TCP protocol.

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