GX Works3 and FX5U Ladder Sequencing - PLCS.net

lgray66 · September 13th, 2018, 02:06 PM

Hello,
I'm new to Mitsubishi, but not to PLC programming. I have converted a program we've used on AB, Siemens, and Automation Direct to the FX5U; and the attached rungs do not work. Basically, it just zeros a variable, then adds a number to it based a bit. It is as if it is only executing the MOV and not the ADD. I thought maybe it was just the monitoring was not displaying it correctly, but the routines that follow are not executing. I've also attached the same routine from Siemens, showing the ADD working. Is there something I need to do differently in GX Works3? Has anyone else seen this behavior?

sczot · September 14th, 2018, 01:39 AM

hello,

MOVE after SM400 will write 0 to D40 in every scan

ADDP_U is PULSE controled instruction, so written value will stay in D40 only for one scan

lgray66 · September 14th, 2018, 07:56 AM

Thank You! I had selected the pulse version by mistake.

sczot · September 14th, 2018, 09:48 AM

i gladly helped

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September 14th, 2018, 01:39 AM	#2
sczot Member Join Date: Nov 2017 Location: cz Posts: 47	hello, MOVE after SM400 will write 0 to D40 in every scan ADDP_U is PULSE controled instruction, so written value will stay in D40 only for one scan

September 14th, 2018, 07:56 AM	#3
lgray66 Member Join Date: Mar 2009 Location: Ohio Posts: 3	Thank You! I had selected the pulse version by mistake.

September 14th, 2018, 09:48 AM	#4
sczot Member Join Date: Nov 2017 Location: cz Posts: 47	i gladly helped

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