User Manual

Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Function DSS 2-137
2.14 DSS Dialogue with Process Station
Function DSS allows direct dialogue between centralised VISONIK terminals and
remote PRV/BPS/EKL Controllers in the process stations. DSS means "Dialogue with
Process Station".
Process stations in a VISONIK DCS system which are fitted with PRV/BPS and EKL-X
Controllers can be contacted through function DSS as though the dialogue terminal
were connected through the local PRV/BPS/EKL interface.
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Function DSS can only be called from VISONIK Server terminals or Insights which
are connected to the DCS through V.24 interfaces.
2.14.1 Initial Access and Handling
For an operator, initial access to a process station with function DSS is the same
irrespective of whether the process stations have PRV, BPS or DKL-X controllers.
8564Z26
Terminal
DCS
BPS
How to call up a process station (e.g. $177) with the DSS function:
Entry of a technical address at PRV/BPS/EKL-X:
T6 09:58:18 Function =PNT : DSS
Partner address (UA/TA)=$177:
$177> (PS=127,SYS=0) : OK
$177>
The process station address can be entered as a technical address with "$o" in octal or
with "$d" in decimal format. Also see the TAFO parameter.
T6 09:59:15 Function =PNT : DSS
Partner address (UA/TA) =$o306: 127 ---> PS decimal address
Upon entry of a user address, the DC Server prints out the TA parameter of the point as
acknowledgement.
T6 09:59:16 Function =PNT : DPS
Partner address (UA/TA) =$177: G01'04'L5
TA=$o12'032 okay
$12> (PS=10,SYS=0) : OK
$12>
If DSS is used to call a PRV/BPS/EKL which is busy, the following message is given:
09:59:32 DSS aborted to $177 PS busy
Note