Status Word Two (Stw02); Format Of Status Word Two (Stw02) - Siemens SIMATIC TI525 Hardware And Installation Manual

5.2.3.2

Status Word Two (STW02)

As illustrated in Figure 5-3 below, STW02 shows the status of up to sixteen
bases. From right to left, each bit in the word represents a base. The bit is set to 1
when the base that it represents has failed or is not present, and it contains a 0 if
the base is good. An empty base is reported with a 0, and bases 0 and 1 are
always reported with a 0.
MSB
Bit 1
STW02
Figure 5-3 Format of Status Word Two (STW02)
Status words three through five are not used by the
TI525/TI535.
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STARTUP / TROUBLESHOOTING
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
NOTE
5-9
LSB
Base 0: always 0
Base 1: always 0
1 = base 2 has
failed or is
not present
D
D
D
1 = base 15 has
failed or is
not present
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