Applications With Redundant Operation - Pepperl+Fuchs HD2-GTR-4PA Manual

Operation
In the FR environment all PA slaves are configurated as normal non-red-
undant slaves. The BIS can be configurated as an FR slave. For addi-
tional information, see chapter "Redundancy Concepts" on page 63.
•
Figure 6.4: Integration into Flying Redundancy and non-redundant system
6.4.3

Applications with Redundant Operation

Redundancy is available if:
• both Gateways are in operation with no errors
• both Gateways detect DP baudrates and
• there are no errors in PA communication.
If redundant operation is not available, that will be reported by slave di-
agnostics.
Note
Possible reasons for Redundancy Switchover are:
• Hardware error in the primary Gateway.
• Loss of baudrate (cable break, etc.).
• BIS drops out of the cycle (because of an unlock from the Ma-
ster or the Watchdog time has expired, etc.).
Redundancy Switching has taken place if:
• both BISs have dropped out of communication and
• the primary BIS comes up again on the bus immediately or
• the BISs on the DP-BUS have changed roles.
The Primary Gateway is identifiable by:
• its LED „Red." (Redundancy) is flashing or being lit.
Subject to reasonable modifications due to technical advances.
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P R O F I B U S P
Master 1 Master 2*
primary
Gateway
backup
Gateway
H S
O W E R U B E G M E N T
PA slave
PA slave
PA slave
PA slave
*Flying Redundancy
C
O U P L E R
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