SDC2130 closed loop count position mode not responding.

The count mode is different. Since it is based on your feedback (hall counter[brushless] or encoder), it doesn't work like the other modes.

To get your motor 1 to get to encoder count 1000, then you must send serial command !P 1 1000. If yo want relative to 1000, then the syntax is !PR 1 1000.

Please refer to the user manual for more information. Page 103

If the change in command is too small, you may not see the motor move at all; that is to be expected. 1 pulse = 4 counts.

If you were to rotate the motor shaft by hand 1 full turn, you can measure how many counts it has gone up or down, to make that turn happen.

So if you want to see the motor move, you have to send a bigger value count.

If you use Roborun+, yes. First make sure your encoders are wired to the correct pins. See if your encoder is actually working, go to the run tab of the utility.

If you are using encoder channels 1A and 1B, pins 4, 8, then you will need to disable pulse inputs 1 and 2. Set to disabled, and no action, and uncheck the check boxes. The reason for doing so is that the pulse inputs 1 and 2 share the same lines and signals, therefore they will conflict with each other. See note in datasheet.

Set a channel in the bottom right corner for counter 1. If you rotate the shaft of the motor by hand, this number will go up or down depending on the direction you spin the motor.

If this is good, then your mode should work correctly.

My impression is that perhaps you didn't disable the pulse inputs.