User Manual

Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Function SRR 2-295
2.29.2.2 Creating a new step reaction register entry
Depending on the type of reaction program, the following prompts must be answered in
order to create a new reaction register entry:
Definition of the "reason"
The reason for a step reaction is the Step Flag Addr. All SRR entries having this flag as
a reason form steps that will be processed one after another.
The step reaction register function is triggered when
•
there is a change in the "resultant flag value" (RFL parameter) value defined in the
"SRR Start Values" (STVR parameter).
•
the flag value is changed from one value back to that same value.
The sequence of reactions within the step sequence is established by the entry number.
In the reaction entry, the "Delays after SRR" reasons a corresponding delay time in
seconds before the next reaction is executed.
The start of a step reaction is dependent in particular on the OSV parameter (out of
service) of the Step Flag Addr.:
•
A running step reaction can be interrupted anytime using "OSV" = Yes.
•
If "OSV" = Yes, the step reaction cannot be started even if all starting conditions are
fulfilled.
•
If a running step reaction is triggered, it will be interrupted and newly restarted.
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 correspont
to a value belonging to the entry.
Blocking Flag=. : $F10
Flag Value =Off : ?
Flag Value =(&,.,*,-,+=,-=,Off,Step 1,Step 2,Step 3):
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.
Definition of the reaction to be executed
The following step reactions can be triggered via a step reaction entry:
Reaction =(UA,TA): ?
UA/TA = Change Point Parameter
CT = Printout Cleartext
MC = Issue MACRO Command
SLVM = Output Slave Message
CB = Start/Stop COLBAS Task
. = No Reaction (for MRR & GRR)
PICT = Auto Picture/Point Selection
Reaction =(UA,TA):
Step flag addr.
Entry
Delays after SRR
Starting conditions
Blocking flag
Flag value