Redundant PROFIBUS DP interface
34
SIPROTEC PROFIBUS DP - Bus mapping 6MD662/3/4
C53000-L1840-B011-03
Figure 1-11 Example of a redundancy start-up with the result: Module D becomes PRIMARY
1.6.2
Redundancy switchover
The following conditions lead to a redundancy switchover of the slave interface:
1. Switchover request from the PROFIBUS DP master
−
The master signals in “Control_O_1” (ref. to chap. 1.4.1.4) a redundancy state
change.
2. Communication interruption of the PRIMARY module to the master
−
An error in the PROFIBUS DP master device or in the communication line
(line-break or the like).
−
The slave interface recognizes this situation by expiry of the response monitoring
timer or the Toggle bit timer (Toggle bits, ref. to chap. 1.4.1.4).
3. Error in the PRIMARY slave interface
−
An internal error in the PROFIBUS DP module which currently is PRIMARY.
This situation is recognized by the PROFIBUS DP master as a communication
interruption and leads (depending on the master) to a redundancy switchover
request.
PROFIBUS DP module on port B
PROFIBUS DP module on port D
SIPROTEC device is switched on or reset
Transmission of parameters and mapping data
to the PROFIBUS DP modules
S_BACKUP
S_BACKUP
S_PRIMARY
PRIMARY
Tsprimary is running
S_PRIMARY
Tsprimary is running
BACKUP
Tsprimary
expired
Tsprimary
expired
RedCom:
Switchover.req
RedCom:
Switchover.req
Switchover.req
via RedCom
received
Switchover.req
via RedCom
received
PRIMARY state
received from
master
RedCom:
Check.req
New state = PRIMARY
Check.req
Partner module = PRIMARY
received
Summary of Contents for 6MD662
Page 6: ...Preview 6 SIPROTEC PROFIBUS DP Bus mapping 6MD662 3 4 C53000 L1840 B011 03 ...
Page 8: ...Revision index 8 SIPROTEC PROFIBUS DP Bus mapping 6MD662 3 4 C53000 L1840 B011 03 ...
Page 12: ...Table of contents 12 SIPROTEC PROFIBUS DP Bus mapping 6MD662 3 4 C53000 L1840 B011 03 ...
Page 72: ...Standard mapping 3 2 72 SIPROTEC PROFIBUS DP Bus mapping 6MD662 3 4 C53000 L1840 B011 03 ...
Page 86: ...Index 86 SIPROTEC PROFIBUS DP Bus mapping 6MD662 3 4 C53000 L1840 B011 03 ...