Siemens SIMATIC IM 151/CPU, Manual

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Commissioning and Diagnostics
4-10
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Diagnosis of DP Functionality Using the “BF” and “SF” LEDs
If the “BF” and “SF” LEDs light up or flash, the ET 200S is not configured correctly.
The table below shows you the possible error indications together with their
meanings and the necessary action.
The table below shows the LED states for DP slave operation. DP functionality is
irrelevant in stand-alone operation, and a BF LED is not activated (there is no LED
for transmission rate detection).
Table 4-4 LEDs for PROFIBUS-DP
”BF”
LED
”SF”
LED
Description Cause Error handling
On On No connection to the DP
master Bus connection
interrupted
Master does not exist or
is switched off
SF is on due to station
failure
Check that the
connector for the
PROFIBUS-DP is
inserted correctly.
Check whether the bus
cable to the DP master
is defective.
LED
flashes On Parameter assignment
error; there is no data
exchange Slave not configured or
incorrectly configured
Incorrect but
permissible station
address set
Configured address
areas of the actual
configuration not
identical to the target
configuration
Station failure of a
configured sender in
direct data
communication
DP master does not
exist/is switched off, but
a connection to the
programming
device/OP exists
Check the hardware of
the ET 200S.
Check the configuration
and parameterization of
the ET 200S.
Check the setting for
the configured address
areas for the master
and slave.
* On Slave error: impermissible
station address Impermissible station
address set (0,
126,127,...)
Set station address
differs from the
configured address
Set the PROFIBUS
address in the correct
range using the DIL switch
block in the basic module.
LED
off On Slave error: diagnostic
interrupt Master in STOP Switch the DP master to
RUN mode.
LED
off LED
off Data exchange taking
place The target configuration
and actual configuration of
the ET 200S match.
* The status is not relevant.