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Old February 17th, 2020, 04:27 AM   #1

pacak is offline
Join Date: Sep 2006
Location: Arad
Posts: 62
Mitsubishi Robot comm. with Siemens PLC

I'm new to Mitsubishi robots so please bear with me.

I have a setup of an RV-7F-Q1-S15 robot with a CR750-07VQ1-1-S15 controller and a PLC Q03UDVCPU, .Q172DRCPU and QJ71PB93D.
Communication with the S7-315 CPU is done by Profibus. The used addresses start from 12000.

There is a counter in the robot program which I would like to reset by setting a bit in the Siemens PLC but it does not work. I receive the value of the counter in the Siemens PLC (and other signals) so it looks like communication is ok.

The attached picture is part of a program called COMM, which is inserted in the slot table with the condition "Always". The variable M_Counter is defined in another program called VAR (which is not in the slot table) like this:
Def Inte I_Seq, O_Seq,I_SeqNo, M_Counter
M_Counter is used and incremented in another program called MAIN, which is also in the slot table with condition "Start".

So as I said, I can "see" the value of this counter in the Siemens PLC. The last line from the attached picture also works fine, the value I send form Siemens arrives back in Siemens right away.

I also checked in the monitor window of RT Toolbox that when I set my bit in Siemens, bit 12019 is also set in the robot controller.
I also tried the If M_In(12019) Then or If M_In(12019) = 1 Then versions but without any luck.
Why cannot I reset the counter like this?

Any ideas are welcome!

Attached Images
File Type: png Mitsu counter.PNG (82.6 KB, 23 views)
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Old February 17th, 2020, 09:24 AM   #2

sczot is offline
Join Date: Nov 2017
Location: cz
Posts: 59
ive tried to run this in simulation and it was ok, try to contact local mitsubishi electric office, what kind of mitsu feature is this :/

good luck
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