[python01]

I am adding another servo motor to existing system. There is one A1SD75M1 single axis motion controller which was installed already in position 0. I would like to add another two axis motion controller A1SD75M2 in position 5
but am not sure if this would work or if there is limit on the number of motion controllers which can be used on the same rack?

[Crossbow]

You're fine for a couple more modules. What CPU are you using? You can find the actual spec on the number of modules in the manual for that module.

[python01]

Crossbow, on 17 August 2012 - 05:53 PM, said:

You're fine for a couple more modules. What CPU are you using? You can find the actual spec on the number of modules in the manual for that module.

Thanks Crossbow,
I am using A2SHcpu for this system. I have issue with addressing of this module. I think it should be addressed as H5 but whenever I try TO command with H5 I get error 46 in the plc cpu which the manual shows as "Access has been made to a location where no special function module is installed". Could you see if my addressing should be different? I am attaching picture of my system with arrow pointing to the new module I am working with. The module memory starts at 0xC0 and I can read the module memory locations without any problem in GX developer but when I try to write to it (like to reset error) there is a problem.
I am also not able to jog that servo, when I turn on the jog signal, YD6 and YD7 in my case I get Error 108 "Start not possible". Don't know if these two are related?
YDD (CPU Ready) and YD5 (Servo ON) signals are turned on.
Any help will be greatly appreciated.

Attached thumbnail(s)

• 

[Crossbow]

From your pictures I cannot tell the modules in each slot.

But I don't think you understand head address. The head address of the last module is definitely not H5. If you said the addressing begins at C0, then the head address is HC (the starting I/O minus the zero).