User Manual

Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Function MRR 2-177
2.20.2.2 Creating a new maintenance reaction entry
For a new maintenance entry, the following prompts must be answered:
Definition of the "reason"
User or technical address of the point triggering the reaction.
Points of all types may be used as "reasons".
The VISONIK DCS sorts the reaction entries according to their "reasons" and
automatically allocates a number to each entry per "reason".
A reaction entry can only be identified unambiguously with its entry number.
Information about the point involved that has to be taken into account for hour counts.
A point is "in maintenance" when:
–
it is in one or more specific states (ERSTA parameter) for a specified number of
hours, or
–
a specified maintenance date has been reached.
The maintenance counter is now updated in the following cases:
–
System crash
–
Ring outage or process station defect
–
Module missing or defective
–
Point is out of service or suppressed.
If a point either reaches the hours specified in the maintenance reaction register
("Maintenance/Hours =") or reaches the date entered there ("Maintenance/Date="), then
the point is in "maintenance". From this point in time it is shown in the maintenance
report (RPR,MRPT function).
Information about whether the hours counter should be automatically reset to 0 upon
reaching the "in maintenance" state.
Information about whether the maintenance message should be repeated each midnight
for still-running hours counters.
Information about whether the maintenance reaction should be reinitiated each midnight
for still-running hours counters.
Definition of additional conditions (blocking flag)
A flag point with address and value(s) can be assigned to each reaction entry.
This blocking flag constitutes an additional condition that must be fulfilled before the
reaction is executed.
A reaction entry is said to be
blocked
if the current value of the flag
does not
correspond
to a value belonging to the entry.
Blocking Flag=. : $F10
Flag Value =Off : ?
Flag Value =(&,.,*,-,+=,-=,Off,Step 1,Step 2,Step
A specific value or a combination of several values can be entered for the flag value.
In the above example, the reaction entry is executed only if the "reason" is fulfilled and
flag $F10 has the value 1,Step or 2,Step at that time.
In all other cases the reaction entry is blocked, and the reaction is not executed.
Reason
Entry
Status
Current counter
Maintenance / hours
Maintenance / date
Automatic reset
Cyclic message
Cyclic reaction
Blocking flag
Flag value