Commissioning and Diagnostics
6-12
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
Table 6-6 Status and error messages of the IM 153-2
SF
BF
ON
ACT
SF (group fault): red
BF (fault at PROFIBUS): red
ACT (active module in redundancy mode): yellow
ON (supply voltage available): green
IM 153-2AA02/-2AB01
SF
BF
IM 153-2Bx00
ON
ACT
LEDs What to DoMeaning
SF ONACT BF
* On Off On No connection to the DP master
(baud rate detection)
Causes:
The bus communication via
PROFIBUS-DP to the IM 153-2
has been interrupted.
Check the bus setup.
Check that the bus
connector/fiber-optic cable is
correctly inserted.
Check if the interconnecting
cable/fiber-optic cable to the DP
master has been interrupted.
Switch the 24 V DC switch on the
power supply module off and then
on again.
On Flashes Off On The configured setup of the ET 200M
does not match the actual setup of
the ET 200M.
Check the ET 200M configuration, to
find out if a module is missing or
defective or whether an unconfigured
module is inserted.
Check the configuration (for
example with COM PROFIBUS or
STEP 7).
On Off Off On Invalid PROFIBUS address
Is the SF LED of an SM/FM also on?
If so: There is an error or a diagnosis
in an S7-300 module
If not: The IM 153-2 is defective.
Set a valid PROFIBUS address (1 to
125) on the IM 153-2.
Check the SM/FM with the diagnosis.
Change the S7-300 module or the IM
153-2 or contact your Siemens
partner.
* Off On On The IM 153-2 is involved in data
exchange with the DP master and the
I/O modules of the ET 200M.
In the case of redundancy, this
IM 153-2 is the active one of the
ET 200M.
–
* Off Off On There is voltage applied to the IM
153-2. In the case of redundancy this
IM 153-2 is the passive one, i.e. it
does not exchange data with the I/O
modules.
–
Flashes
0.5Hz
Off Off On In redundancy mode, this IM 153-2 is
passive and not ready for a
bumpless switchover (for example,
switching the associated CPU to
STOP).
Put the fault-tolerant system into the
redundant state.
*
Not applicable
** After transition to redundant mode, the SF LED flashes for a further 20 s.
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