T flip-flop

[Pulsar2003 0]

This is a copy or so of a topic I wrote on Modicon page. I need to modify a machine that we mass produce. For one it's reduce the wiring time and material coasts. We want to replace a timer in a circuit and have the programable relay to control the entire system. We'll be using one similar to a PICO Currently, there is a momentary push button Start/Stop that turns on a pump. It'll go for 30 minutes if it's not shutdown. And if the Start/Stop button is pressed again it will shut off the pump before the 30 minutes are over. I have no problems with the entire ladder. I tried to remember the logic of a flip-flop, I made a few attempts in a ladder logic but failed. To resume: On momentary button to start or stop a 30 minute timer. Any Ideas?

[panic mode 246]

you are on a right track, just search forum or download section for "flip-flop"

[Ken Moore 23]

Post what you have so far, which brand of relay?

[BobLfoot 302]

Four Rungs of Ladder XIC I:0.0/0 XIO B3:0/1 BST XIO O:0.0/0 OTL B3:0/0 NXB XIC O:0.0/0 OTU B3:0/0 NXB OTL B3:0/1 BND XIO I:0.0/0 OTU B3:0/1 XIC B3:0/0 BST OTE O:0.0/0 NXB TON T4:0 1.0 1800 0 BND XIC T4:0/DN OTU B3:0/0 Will Work for micro 1000 probably adapt to PICO.

[Pulsar2003 0]

It is a Zelio from Schneider. Model: SR2 D101FU Six inputs and 4 outputs.

[Pulsar2003 0]

I found a forum with a flip-flop copied and pasted from RSLogix in ASCII. I copied and pasted it to my RSLogix. Next I renamed the inputs, outputs, markers and timer to match ZelioSoft 2. Next I simply created the ladder. Unfortunately it still doesn't work. I double checked my own ladder and I didn't mess this one up. I also changed the types of times. Because this type of relay only allows only on set and reset per markers I only had to make an extra one. I'll I have to do now to help others is to find out how to get a copy of my screen shot. Thanks allot.

[TConnolly 13]

IIRC, this kind of programmable relay scans differently than a PLC does. It scans vertically, solving everything in column 1 of the entire ladder first, then returning to the top of the ladder and solving everything in column 2. Keep that in mind as you review your program.

[Pulsar2003 0]

Thank you. Seems odd. I will.

[Mickey 71]

Not at all, Modicon scans that way as does Control Microsystems PLC's (SCADAPacks).