Help with ST/LD program

Silver TT

Member
S
Join Date
Mar 2017
Location
Calgary
Posts
1
Hello, I'm working on a program which sends a modbus message and then re-sends the same message if it does not receive a response. I send the modbus message from a ladder diagram and then call a UDFB which checks if the slave sent back a response by monitoring a coil called "successful_Message". The UDFB should allow the message to re-send a certain number of times, and then stop. I can't seem to get it to stop though, it resets to zero and keeps sending!
Any help is appreciated.

PLC_zpsdyy0viwv.png
 

Similar Topics

C
Need Help Accessing/Printing a Program - CIMPLICITY
Hi all, I am having issues accessing my Cimplicity software - the site code changed after re-install and I am no longer able to attain a new key...
Replies
10
Views
162
Steve Bailey
Steve Bailey
A
Can u help me on a RSLogix 5000 program?
I am completely stuck on building a ladder program that requires a start button to be pressed 3 times to turn on motor 1. Then motor 2 starts...
2
Replies
20
Views
574
drbitboy
drbitboy
A
Need help with small program
Hi all, I’m new to programming and want to write a simple routine. Push start button, turns on sensor. 2 second delay before anymore logic read...
Replies
1
Views
329
drbitboy
drbitboy
N
Looking for help converting MicroLogix1100 Program to Micro 820
Hi! I need help converting an old MicroLogix 1100 project to Micro 820. Project Details I have an old MicroLogix 1100 program that has been in...
Replies
0
Views
470
nedlecky
N
A
Help for write program
Hello friends. I need to write a program. This is exactly what is asked of me: When Sensor 1 and Sensor 2 give output, it will allow Robot to...
Replies
3
Views
952
drbitboy
drbitboy
Back
Top Bottom