converting DM to bit from OMRON CPM2A

[recycled_mind]

guys,

Please help. Ive been having a self study on PLC Programming , I use OMRON CPM2A. I want to program the high speed input from my incremental encoder. Please help how to make some ladder program in order to monitor the pulse generated from my encoder to PLC. I want to set bit 10.00 to ON once the PV has reach example to 100 pulse.

 

[scottmurphy]

Assuming that D1 is the PV, then

LD P_On
CMP(020) D1 #100
LD P_EQ
OR P_GT
ANDLD
OUT 10.00

You will also need to reset the counter once it reaches your required max value. You will need to read the manual for that...

 

[recycled_mind]

I have already done this ladder base from the manual but the bit 10.00 does not light up.

 

[gtsuport]

You need to evaluate the high speed counter present value.
The code you are working with is only comparing the value of DM1 to a constant value of 100.
The high speed counter present value is in channel 248 and 249.
If you set up a MOV instruction before the above listed code, it should work.

LD 253.13
MOV 248 DM1

Let us know how that works.

 

[recycled_mind]

still didnt work. i insert the phaze A incremental encoder output to 0.00 of the plc input. I used PRV(62) and CMP(20) instructions.

any body can help me...

 

[IO_Rack]

Do you have the encoder setup correctly and working? Do you see the Destination word that you have chosen incrementing?

Section 2-2 in this manual gives a very detailed explanation of how to set everything up including examples.

 

[scottmurphy]

If you post your code, it may help. Also, RTM, these help a lot.

I used PRV(62) and CMP(20) instructions.

I don't think you need the PRV instruction, use the address's
specified by gtsupport, and the link provided by IO Rack


Finally, I have to ask, is the PLC in run mode?

 

[recycled_mind]

Got it... what i miss is the PLC settings only... to use the high speed counter.