User Manual 08/2003 Edition

02.99 04.01 05.03
Difference
between
faults and
warnings?
Faults
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition
What is the difference between a fault and a warning?
6 Fault Handling and Diagnostics
6.2 Faults and warnings
Faults (refer to Table 6-2)
– A fault causes an appropriate response for the positioning motor.
– Faults must be acknowledged after the fault cause has been removed.
– The motor signals ”fault present” using its diagnostics LED – red
flashing light.
Warnings (refer to Table 6-2)
– Warnings are automatically deleted after the cause of the fault
has been removed.
Faults indicate to the user positioning motor states where the motor
can only be shut down or switched into a no current condition.
How does the DP master evaluate faults?
1. By reading the status signal ZSW.3 (fault present)
A ”1” signal indicates that there is at least 1 fault.
2. By reading P947 (3B3hex)
The parameter value indicates, bit–coded, which faults are present
(refer to Table 6-2 and Chapter 6.2.2).
3. By reading P954 (3BAhex) (from SW 1.4)
The parameter value indicates, bit–coded, which supplementary
information is present (refer to Table 6-2 and Chapter 6.2.2).
How are the faults acknowledged?
1. Remove the cause of this fault (refer to Chapter 6.2.2).
2. STW.7 (reset the fault memory) = set 0/1 signal edge.
3. Set the STW.0 (ON/OFF 1) to ”0” and ”1”.
Note
If the status signal ZSW.3 (fault effective) is not ”0”, then the above
points should be repeated for the fault or faults that are still present.
SIMODRIVE POSMO A can only resume normal operation after all of
the faults that are present have been acknowledged.
The faults are described in detail in Chapter 6.2.2.
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