SCADAPACK 474 Modbus RTU Communicating with one slave only

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Hello, I need support regarding an issue with SCADAPACK 474,

As a Modbus RTU Master, It's communicating with only one slave at a time.

when I disconnect that slave, communication is established with the next one.

I'm using Baud rate 9600, frame:8 bits, even parity

The slave are 3 ZigBee modules. I checked the slaves ID and it was ok as configured in the SCADAPACK.

I tried to increase and use different scan rates time for the slaves but no results.

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SCADAPACK 474 Modbus RTU Communicating with one slave only

SCADAPACK 474 Modbus RTU Communicating with one slave only

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