User Manual

Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Reactions 2-247
A 3-step switch command should be switched to coincide (SAME) with an analogue
value:
Function Address Parameter Reaction Address Parameter
AI = 21.4 Deg.C
AI = -9.1 Deg.C
DO = 21 ---> DO = 3
DO = -9 ---> DO = 0
2.27.2.3 Change of Parameter to the INVERSE of any Main Value
When the reaction is triggered, the parameter value of the reaction address is set to the
INVERSE
of the main value of any chosen point (so-called function address).
Reaction =$d100'041:
Parameter =DO :
Set Digital Output: Priority=0 =SAME: ?
Set Digital Output: Priority=0 =(Off,On), (LSPV,SAME,INV,.): INV
FNT /Address =$d100'040: $F10
1.Further Address =. :
Message Mask =MSGDEV : 2
The following must be noted:
–
The parameter values of both the reaction address and the function address must
have the same format.
–
The parameter of a reaction address can only take on the value 0 or 1 in an INVERSE
reaction.
–
All function address parameters that are less than or equal to 0 are interpreted as 0
by the VISONIK DCS. The INVERSE value, i.e. 1, is set at the reaction address.
–
All function address parameters that are greater than 0 are interpreted as 1 by the
VISONIK DCS. The INVERSE value, i.e. 0, is set at the reaction address.
–
Function address parameter values are inverted without rounding.
A 3-step switch command should be switched according to the INVERSE of a
measurement:
Function Address Parameter Reaction Address Parameter
AI = 21.4 Deg.C
AI = -9.1 Deg.C
DO = 21.4 ---> DO = 0
DO = -9.1 ---> DO = 1
Example
Example