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M
D
ESSAGES AND
IAGNOSIS
The following message paths are possible:
Message buffer output to the SIWATOOL FTC_B commissioning program
Output through the SIWA_FTC function block to its message outputs
Diagnostic alarms in SIMATIC CPU with OB82 evaluation
Process alarms in the SIMATIC CPU with evaluation in the process alarm
OBs.
7.3 Detection of Messages Using SIWATOOL FTC_B
A message buffer is integrated in the module and holds up to 100 entries. If the
number of messages in the message buffer reaches 99 then a new message will
immediately delete the oldest message. The message buffer can be read at any
time with SIWATOOL FTC_B (menu point "Read all data records") and can be
saved together with the scale parameters. This helps in recognizing, analyzing and
solving problems in the system.
7.4 Detection of Messages Using FB SIWA_FTC
All of the messages of the SIWAREX module can be recognized and processed in
the controller using the FB SIWA_FTC. Additional errors in the processing of the
FB SWIA_FTC are put out through the FB_ERR output variable (see chapter
Programming in SIMATIC STEP 7. )
7.5 Detection of Messages Using the Diagnostic Alarms in the SIMATIC-
CPU.
Operating messages (hardware faults) are recognized in the SIMATIC CPU with
diagnostic alarms. For more information see chapter
STEP 7
.
Recognizing messages with process alarms.
Process alarms enable the user to respond flexibly to technology messages or to
the selected status information. For more information see chapter
in SIMATIC STEP 7
SIWAREX FTC
.
7-99
8 Programming in SIMATIC
8 Programming
8
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