Leds For Profibus-Dp - Siemens SIMATIC IM 151/CPU Manual

Commissioning and Diagnostics
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" "SF" Description
LED LED
On On No connection to the DP
master
LED On Parameter assignment
flashes error; there is no data
exchange
* On Slave error: impermissible
station address
LED On Slave error: diagnostic
off interrupt
LED LED Data exchange taking
off off place
* The status is not relevant.
4-10
Cause
Bus connection
interrupted
Master does not exist or
is switched off
SF is on due to station
failure
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
Impermissible station
address set (0,
126,127,...)
Set station address
differs from the
configured address
Master in STOP
The target configuration
and actual configuration of
the ET 200S match.
ET 200S Interface Module IM 151/CPU
Error handling
Check that the
connector for the
PROFIBUS-DP is
inserted correctly.
Check whether the bus
cable to the DP master
is defective.
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.
Set the PROFIBUS
address in the correct
range using the DIL switch
block in the basic module.
Switch the DP master to
RUN mode.
A5E00058783-01