Today is...
Thursday, December 14, 2017
Welcome to Control.com, the global online
community of automation professionals.
Featured Video...
Featured Video
Wiring and programming your servos and I/O just got a lot easier...
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
System Alarm on DCS
After power failure on plant DCS power switched to UPS (Backup). But Universal station No. 1 showed maintenance message.

After power failure on plant DCS (TDC 3000 Honeywell) power switched to UPS (Backup). But Universal station No. 1 showed maintenance message:
8711 US 01 TEST SUSPECT OPR IO SUBSYSTEM

Please can someone help me to evaluate this message?