Slick togggle in Twido IL? Or am I up in the night?

[TConnolly]

I might have just stumbled on a super slick way to create a toggle in the TWIDO. I downloaded a manual and was looking at the IL instruction set for this thread when it occurred to me that

LDR %I0.0
XOR %Q0.0
ST %Q0.0

should create a toggle.

I am honestly not very familiar with the TWIDO instruction set but if I understand the manual correctly this should work.

Can anyone who is more familiar with the Twido or who has one to test it on confirm this?

 

[Peter Nachtwey]

That works if you don't mind having %Q0.0 toggle while %I0.0 is on

You need to add the one shot feature
LDR %I0.0
ANDN %M0.0
XOR %Q0.0
ST %Q0.0
LD %IO.0
ST %M0.0

If the Twido has PUSH and POP then use this.
LD %I0.0 // LOAD ONCE SO NOT AFFECTED BY CHANGING STATE LATER
PUSH
ANDN %M0.0
XOR %Q0.0
ST %Q0.0
POP
ST %M0.0

 

[TConnolly]

Unless I am mistaken LDR %I0.0 is already a one shot - it loads a 1 only on the rising edge of the input.

Either way the XOR is a cool way to do it. Thanks for confirming the method.

 

[Peter Nachtwey]

You rediscovered the XOR instruction!!!

From 2002
http://www.plctalk.net/qanda/archive/index.php/t-1585.html

I a sure I mentioned this trick before that when this forum had difference interface and data base..