Omron Programmable Terminal

bluebyu said:

.

Click to expand...

I am not sure I understand the screenshot below. It shows writing words into bit-level registers, to me. Y:2000 is in my MC421 module and I can't find a memory table in CX-Motion so that I can look at the actual registers to confirm that is what is happening here.

View attachment omron question .bmp

Oh, wait. I believe the "170" indicates CIO area, correct? If so, that's bit-level, not word-level like the DM? So it's actually transferring bits, correct?

Anytime I see a simple numerical bit (no alpha characters) that means it's using the CIO area, correct? For example: I have a bit addressed as 1409.10. In the I/O table I can't find anything that uses that series of bits, connected to the back plane. I am not having much luck finding what energizes that input.

Reply to post# 91 and 92

Yes, "170" is in the CIO area.

No, it is not just bit level. The CIO memory area can and often is used and manipulated at word level.

The XFER function is more like a copy command. 18 words (or registers) are copied starting at word 170 into 2000 and the next 17 words (total of 18).

As your Motion card is assigned machine 0, the first word of I/O is assigned word 2000. This I/O area is used to share information/command/status/errors

Words 2000 to 2017 are controlled by the PLC. They are used to "tell" the motion card what to do; start task/jog forward/encoder pulses to move/etc

Words 2018 to 2049 are controlled by the motion card to tell the PLC; encoder positions/errors/M Code values/moves done/etc

Hope this helps

ceilingwalker said:

Anytime I see a simple numerical bit (no alpha characters) that means it's using the CIO area, correct? For example: I have a bit addressed as 1409.10. In the I/O table I can't find anything that uses that series of bits, connected to the back plane. I am not having much luck finding what energizes that input.

Click to expand...

Correct.

Use the cross reference to help find what controls a bit.
You will be looking for:
Output coil for the bit, or
Word instructions that may control/change the bit.