You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
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

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Reply
 
Thread Tools Display Modes
Old March 18th, 2006, 08:03 PM   #1
Rikc_AB
Member
Canada

Rikc_AB is offline
 
Join Date: Mar 2006
Location: Alberta
Posts: 1
AB SLC500 RS232 com problems

I have spent several hours trying to establish communication via RS232 with an AB SLC500 /w an L532 CPU that has its DH485 port tied up w/ a Panelview that can't be taken down w/o dumping the plant. It's the only overall view HMI in the plant and has been programmed failsafe if it loses communication w/ the PLC so RS232 is the only option. I have tried everything that I can think of to talk to this rack but no joy. The RSLinx DF1 RS232 drivers fail on error checking or come back with "unable to establish communication" and "check cables and connections" messages. I can simply unplug from the CPU and tie onto my own test unit L531 CPU)and be online everytime. Does any one know if firmware rev can cause this issue? Has anyone else encountered this problem or one similar? If anyone here has advice that may help me resolve this difficulty please post or email me.

Thanks, Rick
  Reply With Quote
Old March 18th, 2006, 08:09 PM   #2
Mickey
Lifetime Supporting Member
United States

Mickey is offline
 
Mickey's Avatar
 
Join Date: May 2003
Location: Palmdale,Ca
Posts: 9,949
The RS232 port might also be configured for DH485. Do you have the offline file, if so check the port config. Did you try autoconfig?
__________________
Mickey

If you want happiness for an hour-take a nap. If you want happiness for a day-go fishing. If you want happiness for a month-getmarried. If you want happiness for a year-inherit a fortune. If you want happiness for a lifetime-help someone else.
----- Chinese Proverb
  Reply With Quote
Old March 18th, 2006, 08:21 PM   #3
FATController
Member
Australia

FATController is offline
 
Join Date: Mar 2006
Location: Sydney
Posts: 15
The DF1 driver will NEVER work on RS232 port configured for DH485.

You need to use the PIC/DH485 driver. That will work.

However, the PIC driver does not work on some computers, and all USB RS232 ports. You need a good PC with a built in RS232 port. If it doesn't work, try another computer.

As a general rule, I avoid configuring this port for DH485, and always buy DF1 panelview.
  Reply With Quote
Old March 18th, 2006, 09:10 PM   #4
Ken Roach
Lifetime Supporting Member + Moderator
United States

Ken Roach is offline
 
Ken Roach's Avatar
 
Join Date: Apr 2002
Location: Seattle, WA
Posts: 13,613
If you have a 1747-PIC and a functional DH485 driver in RSLinx, you should be able to plug into the RJ45 jack on the PanelView itself, which will allow you access to the DH485 network and thus to the SLC. It would be best to know that your DH485 driver is up and running with a different controller before connecting to this HMI that can stop your plant.

It would be even better if you had a 1747-UIC, which doesn't require so much hand-wringing over ports and drivers.

It's possible that the system designer configured the Channel 0 port on the controller to ASCII mode or disabled it, specifically to keep you from doing what you are trying to do.
__________________
- "Simpler is better, except when complicated looks really cool."
  Reply With Quote
Reply
Jump to Live PLC Question and Answer Forum

Bookmarks


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

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
Ab Slc500 Stevic LIVE PLC Questions And Answers 1 January 8th, 2006 06:34 PM
Tracking Problems with AB Micrologix 10dulkar LIVE PLC Questions And Answers 19 October 12th, 2005 03:00 PM
AB PLCs RS232 jeff2004 LIVE PLC Questions And Answers 2 March 2nd, 2004 01:25 PM
AB Backplane problems revisied Andrew Evenson LIVE PLC Questions And Answers 3 December 2nd, 2003 12:56 PM
AB RS232 solid red pedrosz LIVE PLC Questions And Answers 7 October 1st, 2003 09:48 AM


All times are GMT -5. The time now is 08:26 PM.


.