Trouble PLC's - PLCS.net

RogerBrunner · December 11th, 2017, 12:43 PM

I have a diagram that currently is working with no issues, I have built another diagram that closley resembles the current however the 2nd diagram does not function as intended. The RS block does not function. Any ideas??
These are IDEC Smart Relays

cardosocea · December 12th, 2017, 03:27 AM

Is there a setting for the block behaviour? I've never used IDEC, but in Siemens logo for example, you can choose the behaviour of the latch (as in Reset over Set or Set over Reset).

The only other thing I can see that may be giving you trouble is the way the instructions are processed. The RS that doesn't work has a signal coming from a logic block that hasn't been processed yet. This could be it. Have you tried putting that signal into a memory location and then read from a memory location into that RS block?

This seems an awful lot like the Siemens Logo IDE, and from what little I've read it has some rules about how the signals are mapped. Have a go at it.

RogerBrunner · December 12th, 2017, 10:57 AM

Thanks for the assist!
Yes, IDEC is a Seimans LOGO, just rebranded and less expensive!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Topics
Thread	Thread Starter	Forum	Replies	Last Post
RSLinx Classic Crashes PLCs When Using Ethernet/IP Driver	MCB	LIVE PLC Questions And Answers	6	June 5th, 2009 09:22 PM
Siemens and other Western PLCs vs. Japanese PLCs	Andreik	LIVE PLC Questions And Answers	9	April 2nd, 2009 11:31 AM
I need help READ from plcs Mitsubishi .FX.	ade1234	LIVE PLC Questions And Answers	8	March 6th, 2009 09:27 AM
Learning to program PLCs	Cannery	LIVE PLC Questions And Answers	32	October 17th, 2007 09:13 AM
Automation Direct PLC's Opinions	Duwop	LIVE PLC Questions And Answers	44	October 11th, 2007 08:35 AM



This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
*Try our online PLC Simulator- FREE. Click here now to try it.* ---------->>>>>Get FREE PLC Programming Tips

December 12th, 2017, 03:27 AM	#2
cardosocea Member Join Date: Nov 2016 Location: Fields of corn Posts: 754	Is there a setting for the block behaviour? I've never used IDEC, but in Siemens logo for example, you can choose the behaviour of the latch (as in Reset over Set or Set over Reset). The only other thing I can see that may be giving you trouble is the way the instructions are processed. The RS that doesn't work has a signal coming from a logic block that hasn't been processed yet. This could be it. Have you tried putting that signal into a memory location and then read from a memory location into that RS block? This seems an awful lot like the Siemens Logo IDE, and from what little I've read it has some rules about how the signals are mapped. Have a go at it.

December 12th, 2017, 10:57 AM	#3
RogerBrunner Member Join Date: Feb 2017 Location: Florida Posts: 38	Thanks for the assist! Yes, IDEC is a Seimans LOGO, just rebranded and less expensive!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)