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by anonymous
Hi,

is there a Modbus slave limit on the RUT955 for serial devices (RS485)?

We have 20 Modbus slave devices and want to read 10 registers from each device and publish the data over MQTT.

is this possible?

1 Answer

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by anonymous
Hello,

Could you specify the issue that you want to ask questions about?

Regards.
Best answer
by anonymous

is there a Modbus slave limit on the RUT955 for serial devices (RS485)?

We have 20 Modbus slave devices and want to read 10 registers from each device and publish the data over MQTT.

is this possible?

by anonymous
Hi,

There is a limit from a WebUI side, but it is more than 20 devices which means that you will be perfectly fine if you will create 20 instances to read 10 registers each.
by anonymous
That’s great! Out of interest what’s the limit?
by anonymous

Hello,

Modbus protocol limitations support a maximum 247 slave for one master in Modbus RTU.

Regards.