AB Micrologix PTO Function Help

loundeb2

Member
Join Date
Jul 2010
Location
ny
Posts
111
Hi,
I have a Micrologix 1500bxb set up to run a servo for a press feeder. Basically, a limit switch(XIO)on the press causes the rung which the PTO is on to go from false to true and the servo feed starts. When PTO is done, it latches the press down. A timer unlatches it and it goes up and the cycle repeats automatically from there.
It works ok, but I need to delay the start of the PTO after the false to true rung transition(press cycle). I'm having a hard time configuring any kind of delay that will operate automatically and continually after first cycle.

Do you have any tips for accomplishing this? Maybe using a mask or STI? If so, please include a sample. I've attached my program. Feel free to modify for me.

Thank You, Lou
 
Could you not use a timer to set a delay once the limit switch goes false to true? Once the timer is done, start the PTO. Once the press cycle is complete, reset the timer with the RES command.
 
I've tried a bunch of different timer configurations, but the problem is triggering the timer and having it complete it's cycle before the trigger goes false and the DN bit is set. I found using a TON for the press down time and TOF for the servo delay to work ok, but I wonder if there is a better way.
 

Similar Topics

Hi, I can't seem to find a thread on this, so I'm starting one. I want to use 2 PTO outputs off a BXB 1400 Micrologix series C. BUT... I need...
Replies
2
Views
1,677
Hello Everyone, I have a new project that I will be working on over the holiday break and have never done a stepper before I am using a...
Replies
10
Views
2,856
Good Day, I current have a setup with a Ultra3000 servo controlling a conveyor for a slicer. Recently, never before I started having a problem...
Replies
0
Views
1,344
I currently use a Jog Continuous at 5000hz successfully. My application requires a two speed blended jog now. I need to start the jog at a...
Replies
3
Views
2,585
Hello! First time poster here. I've been in and out of PLC programming for around 10 years now. My current project has me way deeper into...
Replies
15
Views
5,685
Back
Top Bottom