Operation of the DP/PA Link and the Y Link
8-5
DP/PA Link and Y Link Bus Couplings
A5E00193841-011
Startup diagram of the IM 157
During start-up, the two IM 157 modules are addressed independently of one
another:
Each DP master configures and parameterizes its IM 157 (independently of the
other DP master) and sends the corresponding configuration.
During error-free operation, the IM 157 that is connected to the subsystem of
the master CPU is activated.
As soon as the other DP master has also configured and parameterized its
IM 157 without errors and sent the entire configuration, the IM 157 is made
available on standby.
The IM 157 at the subsystem of the reserve CPU is passive. If the active
IM 157 fails, it is still able to continue processing the slaves.
Figure 8-2 shows a simplified layout of the mutually independent behavior of the
two IM 157.
IM 157 on the subsystem of the master
CPU
The DP master configures and
parameterizes the IM 157 and sends the
configuration.
IM 157 on the subsystem of the reserve
CPU
The IM 157 is completely parameterized and
configured and has received the
configuration
The DP master activates the IM 157.
The ”ACT” LED comes on.
The DP master configures and
parameterizes the IM 157 and sends the
configuration.
The IM 157 is completely parameterized and
configured and has received the
configuration
The IM 157 is activated and engages in data
exchange with the slaves.
The ”SF” and ”BF 2” LEDs go out.
The IM 157 is ready for a data exchange
with the slaves and is on standby for a
switchover should it become necessary.
Figure 8-2
Start-up behavior of the two IM 157 modules in redundant operation
Содержание Simatic 6ES7 157-0AC80-0 A0 Series
Страница 14: ...Contents xiv DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Страница 42: ...Installation 3 12 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Страница 70: ...Commissioning the DP PA Link 6 12 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Страница 162: ...Technical Specifications B 40 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Страница 170: ...Order Numbers and Accessories D 4 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Страница 178: ...Glossary Glossary 8 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...
Страница 182: ...Index Index 4 DP PA Link and Y Link Bus Couplings A5E00193841 01 1 ...