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Modbus TCP
#3
The first number before the address is function number: 1= coil, 3 = holding register, 4 = input register. The actual address might be in hex but you will have to check. You probably will have to subtract 1 from the address. Try reading register 0 or 1, it should contain the alarm status. But as Daniel said once you get addressing right using profile is more convenient.
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Messages In This Thread
Modbus TCP - by Seijboldt - 30.07.2020, 17:15
RE: Modbus TCP - by Daniel - 31.07.2020, 07:30
RE: Modbus TCP - by Erwin van der Zwart - 31.07.2020, 07:37
RE: Modbus TCP - by admin - 31.07.2020, 07:33
RE: Modbus TCP - by Seijboldt - 31.07.2020, 07:50

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