Writing to a holding register _ Tension controller MODBUS

[henk1000]

I've tried writing the register using python but it did not work. The manual talks about writing to the memory but I do not fully understand it..., how I am supposed to use the blocks in Labview and writing in the memory of the device.

[GerdW]

Hi Henk,

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@henk1000 wrote:

I've tried writing the register using python but it did not work. The manual talks about writing to the memory but I do not fully understand it..., how I am supposed to use the blocks in Labview and writing in the memory of the device.

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At first: You should ask the manufacturer when you have questions on their manual…

My interpretation of the shown text snippet: you need to write certain values to a command register (@320) to have your device actually use the changed values in the parameter registers…

[henk1000]

I have sent them email early when I arrived at work. Still waiting for a reply.
I will  write a single register to @320 and after try to write to @142, 143 and see if it works.

[henk1000]

Did not work 😑

[dkfire]

How is the controller connect to your PC ? 

Can you share your test vi with us?

[henk1000]

Computer -> switch (static address) -> device
For reading it works now. The main problem is to write. I am now trying with python for writing the values in the register.

[henk1000 · Accepted solution]

So far the solution is using a python script.