Emerson FIELDVUE DVC6200f, Инструкция по эксплуатации

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DI Function Block
November 2010 191
Invert Option
Alarm Detection
FIELD_VAL_D
MODE SIMULATE
PV_D
OUT_D
Discrete Signal
Figure 4-29. Discrete Input Function Block Schematic
Table 4-77. Channel Selection for the Discrete Input Function Block
Selection Transducer Block Parameter
(1)
Transducer Block
Index Number
Bit Number
(2)
23 TRAVEL_D 33 N/A
24 INST_ALERTS_ACTIVE:PROX_ACTIVE 74.5 0: Travel Open
25 INST_ALERTS_ACTIVE:PROX_ACTIVE 74.5 1: Travel Closed
26 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE 74.4 2: Travel Limit Lo Lo
27 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE 74.4 4: Travel Limit Lo
28 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE 74.4 3: Travel Limit Hi
29 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE 74.4 1: Travel Limit Hi Hi
30 INST_ALERTS_ACTIVE:PROX_ACTIVE 74.5 5: Proximity Lo Lo
31 INST_ALERTS_ACTIVE:PROX_ACTIVE 74.5 4: Proximity Lo
32 INST_ALERTS_ACTIVE:PROX_ACTIVE 74.5 3: Proximity Hi
33 INST_ALERTS_ACTIVE:PROX_ACTIVE 74.5 2: Proximity Hi Hi
1. Refer to table 4-14 for parameter descriptions.
2. See pages 432 and 434, Travel ALerts and Prox Alerts, for information on accessing these alerts. Refer to Appendix F for information on accessing these alerts through DeltaV.
Open/Closed Limit Switch
Channels 24 and 25 provide valve open and closed
limit switch functionality for the DI block. These
channels will detect if the valve position is more than
the Travel Open Alert Point for open detection or less
than the Travel Closed Alert Point for closed detection.
These channels provide an adjustable deadband to
clear the detected position.
0= Not Active, 1= Active
Variable Limit Switch
Channels 26 through 29 provide variable limit switch
functionality for the DI block. Trip points for this limit
switch functionality are based on the Travel Alert
settings in the transducer Block. The DI function block
provides the same type of position detection as the
travel alerts in the transducer block. Table 4-78 lists
the transducer block parameters used with DI block
channels 26 through 29. Refer to Travel and Prox, on
page 432 for more information on the transducer block
travel alerts.
0= Not Active, 1= Active
Table 4-78. Transducer Block Parameters Used with Discrete
Input Function Block Channels 26 through 29 (Variable Limit
Switch)
Transducer Block
Parameter
Parameter Function
Travel Lo Lo Alert Point Lo Lo Limit Switch Trip Point
Travel Lo Lo Alert Deadband Lo Lo Limit Switch Deadband
Travel Lo Alert Point Lo Limit Switch Trip Point
Travel Lo Alert Deadband Lo Limit Switch Deadband
Travel Hi Alert Point Hi Limit Switch Trip Point
Travel Hi Alert Deadband Hi Limit Switch Deadband
Travel Hi Hi Alert Point Hi Hi Limit Switch Trip Point
Travel Hi Hi Alert Deadband Hi Hi Limit Switch Deadband
4