Valve Travel; Open/Closed Limit Switch; Variable Limit Switch - Emerson Fisher FIELDVUE DVC6000f Instruction Manual

DVC6000f Digital Valve Controllers
4
Selection
23 TRAVEL_D
24 INST_ALERTS_ACTIVE:PROX_ACTIVE
25 INST_ALERTS_ACTIVE:PROX_ACTIVE
26 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE
27 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE
28 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE
29 INST_ALERTS_ACTIVE:TRAVEL_ACTIVE
30 INST_ALERTS_ACTIVE:PROX_ACTIVE
31 INST_ALERTS_ACTIVE:PROX_ACTIVE
32 INST_ALERTS_ACTIVE:PROX_ACTIVE
33 INST_ALERTS_ACTIVE:PROX_ACTIVE
1. Refer to table 4-13 for parameter descriptions.
2. See pages 4-31 and 4-33, Travel ALerts and Prox Alerts, for information on accessing these alerts. Refer to Appendix F for information on accessing these alerts through DeltaV.

Valve Travel

Channel 23 provides valve travel.
0 = Closed, 1 = 100% open, 5 = 5% open, 10 = 10%
open, 15 = 15% open, etc.

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
4-162
Discrete Signal
FIELD_VAL_D
Invert Option
SIMULATE
Figure 4-31. Discrete Input Function Block Schematic
Table 4-76. Channel Selection for the Discrete Input Function Block
(1)
Transducer Block Parameter
Alarm Detection
PV_D
MODE
Transducer Block
Index Number
33
74.5 0: Travel Open
74.5 1: Travel Closed
74.4 2: Travel Limit Lo Lo
74.4 4: Travel Limit Lo
74.4 3: Travel Limit Hi
74.4 1: Travel Limit Hi Hi
74.5 5: Proximity Lo Lo
74.5 4: Proximity Lo
74.5 3: Proximity Hi
74.5 2: Proximity Hi Hi

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 4-77 lists
the transducer block parameters used with DI block
channels 26 through 29. Refer to Travel and Prox, on
page 4-31 for more information on the transducer
block travel alerts.
0= Not Active, 1= Active
OUT_D
(2)
Bit Number
N/A
December 2009