Communication in SIMATIC S7-300/1200/1500
11.9 Diagnostics messages
SIWAREX WP321
104 Manual, 07/2014, A5E33715669A-02
The DIAG LED flashes red when a diagnostics message is present. Diagnostics messages
are displayed as plain text in STEP 7 (TIA Portal) by means of online and diagnostics views.
You can evaluate the error codes by means of the user program.
The following diagnostics messages can be signaled:
Table 11- 4 Diagnostics messages
Diagnostics message
Error code
Meaning
Remedy
Fault 9H Internal module fault,
defective
Replace technology module
Load voltage missing 11H L+ for technology
module missing
Check supply voltage on base unit
Hardware interrupt lost 16H Technology module
cannot send an inter-
rupt because the pre-
vious interrupt has not
yet been processed
Change interrupt processing in the
CPU, change technology module
parameter settings.
Module temporarily not available 1FH Normal operation of
module not possible
because, for example,
a FW update is being
carried out.
Wait until the module assumes
normal operation.
Undervoltage 02H Undervoltage on
sense lines
Voltage drop up to the load cell is
too large. Find out why.
Overload 07H Upper limit for sensor
voltage exceeded
Eliminate scale overload
Underload 08H Lower limit for sensor
voltage fallen below
Check mechanical system of scale,
check sensor wiring.
Checksum error in parameter 0DH The checksum for the
integrity of the pa-
rameters is incorrect
Download factory setting of the
parameters.
Checksum error program 0EH The checksum for the
integrity of the pa-
rameters is incorrect
Download firmware again, replace
module
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