System data RS 139
Cycle time used when retriggering
Address E F08AH
This system data word contains the time used for the cycle since the
last system checkpoint (at the beginning of OB 1) to the next
retriggering with OB 222 (if OB 222 is called more than once within
the cycle, the time to the last retriggering).
The time value is the content of RS 139 * 10 ms.
System data RS 253
List of interface modules plugged in
Address: E F0FDH
High byte
Bit no. Assignment
15
reserved
14
13
12
11 IM number 11
10 IM number 10
9 IM number 9
8 IM number 8
Low byte
7 reserved (IM number 8)
6 reserved (IM number 7)
5 reserved (IM number 6)
4 reserved (IM number 5)
3 reserved (IM number 4)
2 reserved (IM number 3)
1 reserved (IM number 2)
0 reserved (IM number 1)
Table 8-20 Bits of RS 253 (list of interface modules plugged in)
Bit Assignment of the System Data Words
CPU 948 Programming Guide
C79000-G8576-C848-04
8 - 41
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