Siemens SIMATIC CM35 Manual page 110

Table 7-13 Allocation of the hardware interrupt information (OB 40/local data bytes 10 and 11)
Local Bit
Byte B t
Group Interrupt
10 0 Failure of a timer
1
2
3
4 Disregard
5
6
7
11 0 Timer expired
1
2
3
4 Disregard
5
6
7
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
Meaning
Selective Interrupt
Timer 1 failed
Timer 2 failed
Timer 3 failed
Timer 4 failed
Timer 5 failed
Timer 6 failed
Timer 7 failed
Timer 8 failed
Timer 1 expired
Timer 2 expired
Timer 3 expired
Timer 4 expired
Timer 5 expired
Timer 6 expired
Timer 7 expired
Timer 8 expired
Timer Operating Mode
Value Range
0/1
0/1
7-13