Diagnostics Using LEDs
9-3
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 do
Meaning
SF
What to do
Meaning
ON
ACT
BF 2
BF 1
Off
Off
Flash
es
(quickly)
*
On
Power-up delay is active on
the IM 157.
If the IM 157 does not com-
plete startup within 20 sec-
onds, check in the configura-
tion whether start-up is en-
abled for desired layout
ac-
tual layout.
*
Off
On
Off
On
Non-redundant operation:
IM 157 configuration missing
Check whether the CPU or
the DP master are in RUN
mode.
Redundant operation:
The IM 157 is passive and
cannot be switched over yet.
Check whether the H system
is in redundancy mode.**
*
On
*
Off
On
No connection to the DP
master. Possible causes:
The bus communication
to the IM 157 has been
interrupted.
The DP master is not in
operation.
Check that the bus
connector is correctly
inserted.
Check if the
interconnecting cable to
the DP master has been
interrupted.
Switch the 24V DC switch
on the power supply
module off and then on
again.
*
Flash
es
*
Off
On
There is no data exchange
between the DP master and
the IM 157.
Check the configuration.
Check the PROFIBUS
address.
Summary of Contents for Simatic 6ES7 157-0AC80-0 A0 Series
Page 14: ...Contents xiv DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Page 42: ...Installation 3 12 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Page 70: ...Commissioning the DP PA Link 6 12 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Page 162: ...Technical Specifications B 40 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Page 170: ...Order Numbers and Accessories D 4 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Page 178: ...Glossary Glossary 8 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Page 182: ...Index Index 4 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...