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These parameters are included in the "libmodbus" library. You are welcome to modify them yourself.
https://revolution.kunbus.de/forum/viewtopic.php?f=6&t=2023&hilit=modbus+timeout&start=20
How to …?
How to configure a (Virtual) Modbus TCP Master in the Revolution Pi
Have a look in the link below:
https://kunbus-gmbh.atlassian.net/servicedesk/customer/portal/1/article/2379186179?src=-1420129237
Is there …?
Is there a practical example of putting a Modbus client into operation?
Take a look at this wonderful troubleshooting as an example of how it works:
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Is there an industrial switch I can use with a Revolution Pi module?
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It is not possible to write only once with piModbusMaster.
For this, you can directly access the libmodbus API from another application on startup for making needed initialization and thereafter start piModbusMaster service.
Others Questions…?
How many Modbus-RTU Servers (slaves) are addressable?
The maximum addressable Modbus-RTU Servers are 247
But per RS485 segment, there may be a limitation to 32 devices on a serial line because of the serial driver
Original discussion
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