Installation, Operation and Maintenance Manual
September 2019
MAN720_IMVS2000v2_IOM Rev. 6
Section 5: Working Principle
Working Principle
Name Terminals # Type Description
Type of
Command
PST CONTROL
(*) (***)
23-24
Digital
Input
When activated a “Manual PST”/”SOV Test” command is
performed.
It’s usually used for launching a Manual PST Command.
If “PST En.” = “No," “PST Pos. %” = 0.0%, “PST Pres. %” = 0%, and
“PST Time %” = 0%, it’s used for starting the SOV Test:
• If “Act. Mode” = “Single” or “Double-S," “PST Ser. SOVs” =
“One” and “Sov Qty” = “Simplex," it’s used for launching
the SOV A Test.
• If “Act. Mode” = “Single” or “Double-S," “PST Ser. SOVs” =
“Both” and “Sov Qty” = “Series,"
it’s used for launching the SOV A – SOV B Test.
See sections 5.1.9.3 and 5.1.9.4 for details.
This command is activated on the rst valid signal commutation
(from “Low” to “High” of at least 1 second) and it is not repeated
till a new valid signal commutation.
Pulse Control
(*) It is automatically “ignored” during the execution of the following commands: Calibration, Baseline
Signature, Maintenance Signature, Baseline PST and Manual PST.
(**) If “Act. Mode” = “Double” if the SOV A CMD is active the SOV B CMD is automatically “ignored.”
(***) This command can be performed only if the Manual PST command is available (see 6 for details).
(****) The change of status (from not active to active) is used when the DI is associated to the SOV TEST command.
5.2.2.2 Position Request Table
The following table shows how the Digital Inputs, according to different settings, determines the
Position Request. See Section 6 for details about the configuration parameters.
Table 3.
Position Request Table – Digital Inputs
“Act. Mode” “Fail Action” “SOVs Qty”
SOV A
CTRL
SOV B
CTRL
“Position Request” (*)
Single or Double-S CL Simplex Active - 100%
Single or Double-S CL Simplex Not Active - 0%
Single or Double-S CL Series Active Active 100%
Single or Double-S CL Series Not Active Active 0%
Single or Double-S CL Series Active Not Active 0%
Single or Double-S CL Series Not Active Not Active 0%
Single or Double-S CL Parallel Active Active 100%
Single or Double-S CL Parallel Not Active Active 100%
Single or Double-S CL Parallel Active Not Active 100%
Single or Double-S CL Parallel Not Active Not Active 0%
Single or Double-S OP Simplex Active - 0%
Single or Double-S OP Simplex Not Active - 100%
33
To Next Page
Loading...
