Example Of A Status Word With A Bit Set - Siemens SIMATIC TI525 Hardware And Installation Manual

STARTUP / TROUBLESHOOTING
In Figure 5-7, the 1 in Bit 10 indicates that slot seven in Base 0 contains a
malfunctioning or incorrectly configured module (I/O mismatch). All other slots
either contain a working module or no module at all.
1
Bit #
Value 0
8
Slot #
Base
Figure 5-7 Example of a Status Word With a Bit Set
When a distributed base loses communication with the PLC, the
appropriate bit in STW02 shows a 1, and the corresponding bits
in STW12 to STW18 show zeroes, even if modules on that base
have failed or been incorrectly configured. That is, modules do
not show failures on a base that is not present.
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Bits in Status Word 11
2 3 4 5 6 7 8 9
0 0 0 0 0 0 0 0
7 6 5 4 3 2 1 8
Base 1
NOTE
5-13
10 11 12 13 14 15 16
1 0 0 0 0 0 0
7 6 5 4 3 2 1
Base 0
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