Diagnostic Messages Of The Analog Input Modules - Siemens SIMATIC S7-300 Reference Manual
Programmable logic controllers module data
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Analog Modules
Reading out diagnostic messages
You can read out detailed diagnostic messages by means of SFCs in the user
program (refer to the Appendix "Diagnostic Data of Signal Modules").
You can view the cause of the error in STEP 7, in the module diagnosis (refer to
online Help for STEP 7).
Diagnostic message in the measured value of analog input modules
Every analog input module supplies the measured value 7FFF
parameter assignment when an error is detected. This measured value means
either Overflow, Malfunction or a channel is disabled.
Diagnostic message by means of SF LED
Every analog module indicates errors for you by means of your SF LED (group
error LED). The SF LED lights as soon as a diagnostic message is triggered by the
analog module. It goes out when all errors have been rectified.
Diagnostic messages of the analog input modules
The table below gives an overview of the diagnostic messages for the analog input
modules.
Table 4-46 Diagnostic Messages of the Analog Input Modules
Diagnostics Message
External auxiliary supply missing
Configuring/parameter assignment
error
Common-mode error
Wire-break
Underflow
Overflow
4-72
LED
Diagnostics
Effective for
SF
Module
SF
Channel
SF
Channel
SF
Channel
SF
Channel
SF
Channel
Programmable Logic Controllers S7-300 Module Data
irrespective of the
H
Parameters can
be assigned
No
Yes
Yes
Yes
Yes
Yes
A5E00105505-03
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