Diagnostic buffer of module CPU 315-2 DP



Event 1 of 100: Event ID 16# 4562
STOP caused by programming error (OB not loaded or not possible, or no FRB)
Breakpoint in user program: Startup OB(OB 100)
Priority class: 27
FC number: 28
Module address: 176
Previous operating mode: STARTUP (warm restart)
Requested operating mode: STOP (internal)
Internal error, Incoming event
02:19:51.881 PM 06/08/2012

OB100中调用的FC28出错，可是Module address: 176是什么意思？