Internet PLC Forum
Welcome,
Guest
. Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
News:
Home
Help
Search
Login
Register
Internet PLC Forum
»
General
»
Technical support
»
How to Slow down a DC motor in Ladder logic
« previous
next »
Print
Pages: [
1
]
Author
Topic: How to Slow down a DC motor in Ladder logic (Read 14924 times)
lekan
Newbie
Posts: 1
I'm a llama!
How to Slow down a DC motor in Ladder logic
«
on:
January 27, 2009, 09:17:22 AM »
I kind write a PLC code (ladder logic) for ramping up or ramping down a Motor, how can i write a code to detect the motor when its slowing down.....Any help in this matter will be appreciated
Logged
support
Global Moderator
Hero Member
Posts: 3174
Re:How to Slow down a DC motor in Ladder logic
«
Reply #1 on:
January 27, 2009, 09:29:00 AM »
You probably need some kind of tachometer that send pulses to the PLC's Pulse Measurement inputs and measure the speed using the PULSEFREQUENCY function.
Logged
Email: support@triplc.com
Tel: 1-877-TRI-PLCS
philipjoseph
Jr. Member
Posts: 57
Re:How to Slow down a DC motor in Ladder logic
«
Reply #2 on:
February 01, 2009, 09:26:54 AM »
Check if the Frequency Drive controling the DC motor has MODBUS RTU comunication. If so, depending of the VFD, you may be able to read the frequency from the drive, that will let you know if the Motor slows down.
Philip
Logged
Philip.
Print
Pages: [
1
]
« previous
next »
Internet PLC Forum
»
General
»
Technical support
»
How to Slow down a DC motor in Ladder logic