Siemens SIMATIC ET 200S Manual page 173

Table 6-6 Status and error displays using LEDs on the IM151-1 BASIC / IM151-1 STANDARD/
IM151-1 FO STANDARD / IM151-1 HIGH FEATURE
SF
SF: red
BF
BF: red
ON
ON: green
LEDs
SF BF ON
* on on
on * on
Off Off on
* Not relevant
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Meaning
Transmission rate detection, illegal
PROFIBUS address, or bottom DIP
switch (PROFIBUS address) not in the
OFF position.
Causes:
•
The response monitoring time has
elapsed.
•
Bus communication to the
interface module via PROFIBUS
DP has been interrupted.
The configured setup of the ET 200S
does not match the actual setup of the
ET 200S.
There is an error in an I/O module, or
the interface module is defective.
Data transfer is taking place between
the DP master and the ET 200S.
The target configuration and actual
configuration of the ET 200S match.
Commissioning and Diagnostics
Remedy
Set a valid PROFIBUS address
(1 to 125) at the interface module, or
check the bus configuration.
•
Check that the bus connector is
correctly inserted.
•
Check if the interconnecting cable
to the DP master has been
interrupted.
•
Switch the 24 VDC supply voltage
on and off again at the interface
module.
Check the setup of the ET 200S,
whether a module is missing or
defective, or whether an unconfigured
module is inserted.
Check the configuration (using COM
PROFIBUS or STEP 7, for example),
and correct the parameter assignment
error.
Replace the interface module, or get in
touch with your Siemens contact
person.
--
6-13