LDD driver initialization err

[mliang2002]

ldd parameter device address is incorrect in commands, i think it should be 2051 instead of 3040
also example code does not mention how to initialize multiple ldd objects with different addresses (which may cause errors)

[jscman]

No, for TEC controller it is 2051. For laser driver boards (LDD family) it is 3040.
I checked this, 3040 is accepted by LDD and changes also show up in manufacturer's software.
When using 2051 on LDDs, "Parameter is not available" is raised.

What addresses do you refere to? Multiple hosts can be addressed by multiple instances and do NOT require unique settings for the parameter id 3040 (or 2051) e.g.:
device1 = mecom.MeCom('COM1', metype='LDD')
device2 = mecom.MeCom('COM2', metype='LDD')
device3 = mecom.MeCom('COM3', metype='LDD')

If your boards are connected via RS485 they need unique settings for parameter id 3040 (or 2051). You connect to a single host and add the address to the communication, e.g.:
devices = mecom.MeCom('COM1', metype='LDD')
devices.get_parameter(parameter_id=3040, address=1)
devices.get_parameter(parameter_id=3040, address=2)
devices.get_parameter(parameter_id=3040, address=3)

[mliang2002]

@jscman thx for the response! That what I tried from the example code given, but it does not execute properly on the ldd1301. I even used the command tool and sent serial to the device and I got a parameter not available response:

https://www.meerstetter.ch/customer-center/downloads/category/76-ldd-130x-communication-protocols?download=631:ldd-130x-communication-protocol-5260d

Let me know if there is something I'm missing here.

[jscman]

Ah, I see. It looks like this is related to some of the newer meerstetter boards having different commands. There was a similar issue with the (LDD-1321) which was solved by a metype = "LDD-1321".
I dont know if the whole LDD-13xx family is identical, but in your case I suggest to check the commandy.py and try to use the LDD-1321 type. But you would have to add the commands you need to the command.py (e.g. device address).

[samirceka]

The example code is specific to the LDD-112x family. I have renamed the example from example_LDD.py to example_LDD_112x.py to make this clearer. There should also be a 'LDD-130x' metype now.