Siemens 6MD662, Manual

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Redundant PROFIBUS DP interface
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SIPROTEC PROFIBUS DP - Bus mapping 6MD662/3/4
C53000-L1840-B011-03
Table 1-7 RedCom telegram types
RedCoR The last telegram which was received via RedCom communication from the partner
module is shown.
A byte value at the end of this line counts the number of telegrams received via Red-
Com. This telegram counter is increased by 1 after each telegram up to the value 255
and then starts again with 0.
RedTrc Tredcom supervision time.
Tredcom is started with each telegram which was sent to the partner module via Red-
Com. When the reply from the partner module is received, Tredcom is stopped and
reloaded again.
The Tredcom reload value is 0.3 seconds (not changeable).
This module information line shows:
•
the current Tredcom timer value,
•
a counter of Tredcom expiries and
•
an indication whether Tredcom is currently running (N = not running, R = running).
If the expiring counter is not equal to 0 then this indicates an error in the internal Red-
Com communication.
RedTsp During redundancy start-up:
•
Start-up time Tsprimary, i.e. the timer period within which a slave interface keeps
the S_PRIMARY state (ref. to chap. 1.6.1).
Tsprimary starts at 2 s and will be increased by 2 s after each state change until the
configured maximum value TsprimMax. TsprimMax can be selected during set up
of bus specific parameters in DIGSI (ref. to chap. 1.3.1.2).
Red.sta Red State Changed
One or more status information which are part of the extended “Red_State”
diagnosis data (e.g. “Baudrate found” or “Master_State_Clear”, ref. to chap
1.4.2) have changed.
The changed status information is transferred with this RedCom telegram
to the partner module in order to update the “Red_State_2” byte of the
“Red_State” diagnosis.
EvL.Del Event List Delete Entry
Event list entries on the PRIMARY module of the PROFIBUS DP slave
have been read, acknowledged by the master and deleted from the event
list.
An identification number of the read entries is sent to the BACKUP module
with this telegram in order to delete these entries in the event list of the
BACKUP module too (ref. to chap. 1.6.3).
EvL.SqN Event List Sequence Number
If a module becomes PRIMARY then it sends the sequence number which
is used in the next transmission of event list entries to the PROFIBUS DP
master for the comparison to the partner module.
Telegram type Explanation