Logic Solver Discrete Voter function block parameters

0

NVM:

Preserved on Download

The actual number of votes needed to trip. This can differ from NUM_TO_TRIP if there are bypassed inputs and the BYPASS_OPTS option  A maintenance bypass reduces the number to trip is selected.

False

Access:

Tuning (SLS 1508 and CSLS major revision 1)

Operating (CSLS major revision 2 or higher)

NVM:

Preserved on Download

If BYPASSn is True, IN_Dn is excluded from voting to trip.

None

Access:

Configurable, Tuning

NVM:

Restored on Restart

Configurable options for maintenance and startup bypass behavior. Options are kept in a bitstring internally. The options are:

• A maintenance bypass reduces the number to trip

• Multiple maintenance bypasses are allowed

• Maintenance bypass timeout is for indication only

• Startup bypass preset is allowed while active

• Startup bypass expires upon stabilization

• Reminder applies to startup bypass

• Startup bypass duration is event based.

• Bypass permit is not required to bypass

• Bypass permit control should be visible in operator interface

False

Access:

Tuning

NVM:

Preserved on Download

Must be True for any BYPASSn parameter to be True when the BYPASS_OPTS option Bypass permit is not required to bypass is not selected. When this option is selected, the block ignores BYPASS_PERMIT.

0

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The number of seconds any BYPASSn can be True before the block sets all BYPASSn parameters to False unless the BYPASS_OPTS option Maintenance bypass timeout is for indication only is selected. If that is true or if the value of BYPASS_TIMEOUT is 0.0, the block will not remove bypasses.

0

(Seconds)

Access:

Tuning

NVM:

Preserved on Download

Countdown timer for the bypass function in seconds.

0

(Hours)

NVM:

Preserved on Download

Countdown timer for the bypass function in hours.

0

(Seconds)

NVM:

Preserved on Download

Countdown timer for the TRIP_DELAY and NORMAL_DELAY parameters to determine if the output is tripped or normal.

None

None

Configurable label for IN_Dn

None

NVM:

Preserved on Download

Parameter containing the runtime value of alarm conditions set by the block (inactive = 0, active = 1)

• Trip Active 

• Bypass Active 

• Startup Override Active 

• Expiration Reminder 

• Bypassed Input Tripped 

• Input Bad 

• Inhibited

For a description of the alerts and information on how to access them, refer to DVTR_ALERTS below this table.

0

Access:

Tuning

NVM:

Restored on Restart

Discrete value from a single sensor. IN_Dn is extensible from 1 to 16. The default input count is 3.

Negative

Access:

Configurable (CSLS major revision 2 or higher)

Indicates whether the tripped state is TRUE (Positive) or FALSE (Negative).

This parameter is only supported by CSLS major revision 2 or higher.

0

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The number of consecutive seconds before OUT_D changes to the normal operation value after the number of votes to trip falls below the number required to trip.

2

Access:

Configurable, Tuning

NVM:

Restored on Restart

The configured number of votes needed to initiate a trip condition

0

NVM:

Preserved on Download

The output of the block, either Normal (1) or Tripped (0) as determined by the trip vote function.

0

NVM:

Preserved on Download

The value OUT_D would have if all BYPASSn parameters were False and a startup bypass is not active.

0

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The amount of time an alarm is active prior to the timeout of a maintenance or startup bypass timer if a trip is imminent.

None

Access:

Configurable, Tuning

NVM:

Restored on Restart

Configurable options for block reporting features.

• Alarm conditions do not roll up to module level.

• Event records are not generated.

These options apply only to block alarms and events and not user-defined module alarms.

0

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The time configured to allow for process stabilization during a startup bypass. This is the number of consecutive seconds without a vote to trip while the startup bypass is active. Optionally, the startup bypass expires when the actual stabilization time reaches the configured allowed time.

0

(Seconds)

NVM:

Preserved on Download

The actual number of consecutive seconds without a vote to trip while the startup bypass is active.

False

Access:

Tuning

NVM:

Preserved on Download

Inhibits trip detection during startups. On a rising edge of STARTUP, the block keeps OUT_D in the normal operating state for STARTUP_TIME seconds when the BYPASS_OPTS option Startup bypass duration is event based is False.

When the BYPASS_OPTS option Startup bypass duration is event based is selected, a startup bypass is active when STARTUP is True and inactive when STARTUP is False).

0

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The number of seconds the startup inhibit function is in effect following a rising edge of STARTUP.

0

(Seconds)

Access:

Tuning

NVM:

Preserved on Download

Countdown timer for the startup inhibit function.

Always use Value

Access:

Configurable, Tuning

NVM:

Restored on Restart

Determines the behavior when the status of any IN_Dn input is Bad. Choices are:

• Always Use Value

• Will Not Vote if Bad

• Vote to Trip if Bad.

0

(Seconds)

NVM:

Preserved on Download

The total number of seconds during a startup bypass until the inputs became and remained stable.

0

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

The number of consecutive seconds with enough votes to trip before OUT_D changes to the trip state value.

28800

(Seconds)

Access:

Configurable, Tuning

NVM:

Restored on Restart

Determines the time at which TRIP_INH_TIMER causes the output to go to bad status and to the tripped value.

0

(Seconds)

None

Starts counting when TRIP_STATUS goes to the Trip Inhibited state. This parameter causes the output to go to bad status and to the tripped value based on TRIP_INH_DELAY.

Normal

NVM:

Preserved on Download

Indicates the status of the trip vote and startup inhibit functions:

• Normal

• Tripped

• Trip Inhibited

• Voted to Trip - Delayed

• Voted Normal - Delayed

• Voter Inhibited

False

NVM:

Preserved on Download

A True value indicates IN_Dn is voting to trip.

0

NVM:

Preserved on Download

The number of inputs that have voted to trip. Bypassed inputs are not included in the total.

Inactive when OUT_D is in the normal operating state, active when OUT_D is in the trip state.

0

DVTR_ALERTS.F_CV[1]

Active when there is a maintenance bypass on any input (any BYPASSn parameter is True).

2

DVTR_ALERTS.F_CV[3]

Active whenever the startup bypass is active.

3

DVTR_ALERTS.F_CV[4]

Active when either a maintenance bypass or a startup bypass is about to expire.

5

DVTR_ALERTS.F_CV[6]

Active if one or more bypassed inputs have exceeded the trip limit.

7

DVTR_ALERTS.F_CV[8]

Active if any input has bad status.

8

DVTR_ALERTS.F_CV[9]

Active when TRIP_STATUS is Voter Inhibited or Trip Inhibited.

9

DVTR_ALERTS.F_CV[10]