BIFFI IMVS2000v2 - Page 31

Installation, Operation and Maintenance Manual
September 2019
MAN720_IMVS2000v2_IOM Rev. 6
Section 5: Working Principle
Working Principle
If the “Baseline SOV A Test” command is received, but:
- “Cal. Status” ≠ “Passed” or
- “Base. S. St.” ≠ “Passed” or
- “Pr. S. 1-2” = “None” or
- “Al. PSA En.” = “No”
Then:
- The command is not executed
- “B. PST St.” assumes the value “Conf. Err.”
- “B. PST Date” and “B. PST Time” assume the current date and time values
- The DO PST PASSED contact is opened
- The DO PST FAILED contact is closed
- The graph is not stored
If the “Baseline SOV A Test” command is received, but:
- “Cal. Status” = “Passed” and “CAL Alarm” is active or
- “POS Alarm” is active or
- “HSP Alarm” is active or
- “LSP Alarm” is active or
- The start position is not valid
Then:
- The command is not executed
- “B. PST St.” assumes the value “Failed”
- “B. PST Date” and “B. PST Time” assume the current date and time values
- The PSA Alarm is activated
- The DO PST PASSED contact is opened
- The DO PST FAILED contact is closed
- The graph is not stored
If a “Baseline SOV A Test” is executed, all previous “SOV A TEST” are cleared.
The “SOV A Test” can be executed only if the “Baseline SOV A Test” is successfully executed.
The “SOV A Test” can be performed by using “Manual PST” command or DI “PST CONTROL."
“PST St.” describes the result of the last “SOV A TEST."
“M. PST Date” and “M. PST Time” indicate the date and the time of the last SOV A Test.
If the command is received, but:
- “Cal. Status” ≠ “Passed” or
- “Base. S. St.” ≠ “Passed” or
- “B. PST St.” ≠ “Passed” or
- “Pr. S. 1-2” = “None” or
- “Al. PSA En.” = “No”
Then:
- The command is not executed
- “PST St.” assumes the value “Conf. Err.”
- “M. PST Date” and “M. PST Time” assume the current date and time values
- The DO PST PASSED contact is opened
- The DO PST FAILED contact is closed
- The graph is not stored
If the “SOV A Test” command is received, but:
- “Cal. Status” = “Passed” and “CAL Alarm” is active or
- “POS Alarm” is active or - “HSP Alarm” is active or
- “LSP Alarm” is active or
- The start position is not valid
Then:
- The command is not executed
- “PST St.” assumes the value “Failed”
- “M. PST Date” and “M. PST Time” assume the current date and time values
- The PSA Alarm is activated
- The DO PST PASSED contact is opened
- The DO PST FAILED contact is closed
- The graph is not stored
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