Siemens SIMATIC ET 200S M151-3 PN Manual page 42

Interrupt, error, and system messages
4.1 Diagnostics using LED display
Status and error displays
Table 4- 1 Status and error displays of the IM151-3
LEDs
SF BF MAINT
Off Off Off
* * *
* Flashing *
0.5 Hz
* On *
On * *
On On *
42
Meaning
ON
Off There is no voltage at the interface
module, or the interface module has
a hardware defect.
On There is voltage at the interface
module.
On Faulty or no connect message frame
- no data transfer between the IO
controller and the interface module
(IO device), although the device is
physically connected to the switch.
Causes:
Incorrect device name

Configuration error

Parameter assignment error

The I/O controller is

disconnected/defective or the bus
cable to the controller is missing.
On The IO device is not connected to a
switch.
On The configured structure of the
ET 200S does not match the actual
structure of the ET 200S.
There is an error in an I/O

module, or the interface module
is defective.
Diagnostics data available

On A brand new SIMATIC Micro
Memory Card is being formatted.
Interface module IM151-3 PN HIGH FEATURE (6ES7151-3BA23-0AB0)
Remedy
Switch on the 24 V DC supply

voltage at the interface module.
–
Check the interface module.

Check the configuration and

parameter assignment.
Check the device name.

Assign a valid device name to the

interface module.
Check the IO controller

Check to see if the rear panel bus

has been configured correctly (all
modules inserted, terminating
resistor installed)
Establish a connection to the IO

controller (via a switch).
Assign a valid device name to the

interface module.
Check the bus configuration.

Check that the bus connector is

correctly inserted.
Check whether the bus cable to

the
I/O controller is interrupted.
Check the ET 200S configuration

to see whether a module is
missing or defective, or whether a
non-configured module has been
installed.
Check the configuration (e.g. in

STEP 7
) and correct any
parameterization errors.
Replace the interface module, or

contact your Siemens
representative.
Remove error, e.g. wire break

Wait until the formatting sequence

is complete. This may take several
minutes. If the LED behavior
changes, the formatting process is
complete.
Manual, 08/2010, A5E01584258-04