Diagnostics Using LEDs
9-4
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Table 9-1 Status and error messages of the IM 157
BF 1
ON
BF 2
SF: Group error (red)
BF 1: Bus fault in higher level PROFIBUS-DP (red)
BF 2: Bus fault in underlying PROFIBUS (red)
ACT: IM 157 has an active channel (yellow)
ON: 24V power supply IM 157 (green)
SF
ACT
LEDs What to doMeaning
SF
What to doMeaning
ONACTBF 2BF 1
On Off Off Off On Non-redundant operation: All
slaves are engaged in data
exchange. At least one slave
has reported an error.
Or
Invalid PROFIBUS address
Evaluate the diagnosis of the
IM 157 and check the re-
ported slaves.
DP/PA link only: Check the
status bytes in the slave user
data. Read the slave device
mode with a configuration tool
(e. g. SIMATIC PDM).
Or
Set a valid PROFIBUS ad-
dress for the IM 157.
Redundant operation:
The IM 157 is passive and
can be switched over. There
is an error on the active
IM 157.
Evaluate the LED on the ac-
tive IM 157.
On Off Off On On Redundant operation only:
The IM 157 is active. All
slaves are engaged in data
exchange. At least one slave
has reported an error.
Evaluate the diagnosis of the
IM 157 and check the re-
ported slaves.
Evaluate the diagnosis of the
underlying slaves in the on-
line view of the HW Config.
DP/PA link only: Check the
status bytes in the slave user
data. Read the slave device
mode with a configuration tool
(e. g. SIMATIC PDM).
On Off Flash
es
* On The configured structure of
the link does not correspond
to the actual structure.
Or
The IM 157 has no cyclical
data exchange to at least
configured one slave.
Check the configuration and
structure of the links.
Or
Evaluate the diagnosis of the
IM 157 and check the re-
ported slaves (connection,
address, parameter assign-
ment, configuration).
*
Not applicable
** The ”SF” LED continues flashing for another 20 seconds after the system has switched into redundancy
mode.
To Next Page
Loading...
Need help?
General
