MW20 does not increment every cycle

[L D[AR2P#0.0]]

L P#0.0
T MW 20
A m0.0
L mw 20
+ 2
T mw20

Why not increase during the cycle?

 

[L D[AR2P#0.0]]

Monitor the code and show the accumulators.

At the start of OB1 0 is loaded into MW20
MW20 is then incremented by 2 so that at the end of OB1 MW20=2
At the start of OB1 0 is loaded into MW20
MW20 is then incremented by 2 so that at the end of OB1 MW20=2

You get the picture?

 

[SapherJalt]

Thank you! I'm always forget about conditions for first increment!

From here: http://www.plctalk.net/qanda/showthread.php?t=104485