Siemens Simatic S7-300 - Page 515

Diagnostics Data of Signal Modules
B-3
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Bytes 2 and 3
Byte 2
76 0
Memory module or measuring range module
(for analog modules) incorrect or missing
Communication fault
Operating status 0: RUN
1: STOP
Scan time-out
Module-internal supply voltage failure
Battery empty
Complete backup supply failure
54321
0
Byte 3
76 0
Rack failure
Processor failure
EPROM error
RAM error
ADC/DAC error
Fuse blown
Hardware interrupt lost
54321
0
Figure B-2 Bytes 2 and 3 of the Diagnostics Data