Siemens SIPROTEC Manual page 32

Redundant PROFIBUS DP interface
Ttoggl
32
After redundancy start-up:
• Time until the next Check.req telegram is sent for supervision of the RedCom com-
munication and the partner module .
The reload value for the timer of Check.req. telegrams is 5 seconds (not change-
able).
This module information line shows:
• the current timer value,
• an expiring counter,
• an indication whether the timer is currently running (N = not running, R = running).
Unlike RedTrc (see above), the expiring counter in the RedTsp line should be incre-
mented cyclically. This shows that the next action (e.g. switchover to S_BACKUP or
sending of a Check.req telegram) is executed.
Supervision time of the Toggle bit mechanism.
Every changeover of the Toggle bits in the output telegram to a valid bit combination
re-triggers the Toggle bit timer.
This module information line shows:
• the current timer value,
• an expiring counter,
• an indication whether the timer (i.e. the Toggle bit mechanism) is currently running
(N = not running, R = running).
Please ref. to chap. 1.4.1.4 for a description of the Toggle bit mechanism.
If the Toggle bit mechanism is deactivated, then this is shown in this line as:
Ttoggl: OFF
SIPROTEC PROFIBUS DP - Bus mapping 6MD662/3/4
C53000-L1840-B011-03