INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Need Help - Siemens PLC ACX32.000/ALG - External I/O error problem

Need Help - Siemens PLC ACX32.000/ALG - External I/O error problem

(OP)
Hi

I need your help guys about our Refrigeration Plant system problem,. First of all I have a very little knowledge about PLC.

The system consists of Proface GP2300 (operator display interface) connected to Siemens PLC ACX32.000/ALG with 3 units of Siemens Ext. Module ACX42.12/ALG (I/O-1, I/O-2 and I/O-3).

The system is working normally but everyday, like once or twice a day, it will give an alarm of “External I/O 2 error” sometimes “External I/O 3 error” or “External I/O 1 error” and sometimes 2 of any of them. I assumed they referring to the 3 Siemens Ext. Module.

This alarms is intermittent and will disappear or return to normal stage just less than a second but I need to acknowledge first. I tried to check the serial connection between them and even replacing the cable, and also check each power supply DC-24V connections, but everything is seems normal.

My suspect is the Siemens PLC ACX32.000/ALG.

My question is if ever I will replace the said PLC, Do I just need the following procedures?
1. Power OFF the system.
2. Disconnect all the PLC connections.
3. Remove the old PLC
4. Install the new PLC and reconnect all the cables
5. Power ON the system.
6. And that’s it?
The program will just automatically downloaded to the new PLC by the Proface GP2300 and the system will work right away? Even I use an old and used PLC (coming from our other HVAC system)?

Thank you in advance...

RE: Need Help - Siemens PLC ACX32.000/ALG - External I/O error problem

You may get a better response posting this in the "HVAC/R engineering" forum. The SAPHIR product you have is more of an OEM specialised refrigeration controller. I think it is a push to call it a PLC and more 'an application controller pre-defined by Siemens guys wanting to control that specific refrigeration plant in their specific way'.
I would suggest also this product is obsolete, so support will be limited. Maybe contact the company who supplied the refrigeration system as they would typically define the functionality in their particular way.
Sorry I cannot be any more help.

RE: Need Help - Siemens PLC ACX32.000/ALG - External I/O error problem

(OP)
@ ozmosis

Thanks man, will follow your advicesmile2...

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close