Hi,
Is there any information on the modbus registers for this
HAT?
This
link says it is still under construction
Thanks for any assistance
The file has been updated. Let me know if you have any trouble using the Modbus.
Hi,
I am attempting to use the card vis RS485 directly ( not using an RPI)
ID switches are set to zero
Terminator is on
485TX, 485RX are off
I have set up a modbus scanner using a USB to RS485 using this tool
Modbus Scanner: Perfect to Discover and Test Modbus - Chipkin
set to 9600,8,N,1
I can see the RS485 signals on the RS485 input to the board
Can you suggest anything else I need to configure?
Next step is to revert to using an RPI
Hi,
I am attempting to use the card vis RS485 directly ( not using an RPI)
ID switches are set to zero
Terminator is on
485TX, 485RX are off
I have set up a modbus scanner using a USB to RS485 using this tool
Modbus Scanner: Perfect to Discover and Test Modbus - Chipkin
set to 9600,8,N,1
I can see the RS485 signals on the RS485 input to the board
Can you suggest anything else I need to configure?
Next step is to revert to using an RPI
Hi,
The default port settings for Modbus are 38400,8,N,1.
You either use the same on your scanner or change it using the command line interface (check the online help for details).
Ok great, 38400 did the trick!
Thanks
Also, are there any modbus registers for determining make model or perhaps even serial #.
are there any modbus registers for modifying unit numer comms parameters..
Regards
The Modbus parameters can be changed only over the I2C port. There is a serial number (processor unique ID), but it is available only via bootloader commands, which are not public.
Except that I cannot give you a timeframe, all of this can be available on Modbus with a new firmware release.
How badly and quickly do you need all of these?
Alex.
