ABB COMMANDER C355 - Level 5 - Valve Setup

64
8
U.LU.E
LEV.5
5.00
1..0
d.bnd
5.03
0
VbIA
5.02
0
VrAt
5..01
30
r.trU.
5.04
Position %
Required valve position
Deadband
(centered around
required position)
LEV.5
VLVE
5.00...5.04
…4 SET UP MODE
PID
Control
Terms
PV
SPt
Process
Open relay
Valve
Controller
Position Feedback
Close relay
PID
Output
(PID O/P x
V.rAt )
+
V.bIA
4.5.1 Valve Setup (Feedback Types)
4.5 Level 5 – Valve Setup
Note. Level 5 is applicable only for a motorized valve output type – see Section 5.2, Basic Configuration/
Output Type.
Fig. 4.3 Motorized Valve Output with Feedback – Schematic
Level 5 – Valve Setup
Note. To select this frame from anywhere in this page, press and
hold the
key for a few seconds.
Motorized Valve Ratio and Bias
Desired valve position = (Ratio x PID output) + Bias
Motorized Valve Ratio
[0.01 to 10.00]
Motorized Valve Bias
[–100.0 to 100.0%]
Motorized Valve Deadband
[0.0 to 100% of the position feedback span]
Example. If the valve is set to be driven to the 50% open position and
the deadband is set to 4%, the motor stops driving when the position
feedback is 48%. The deadband is between 48% and 52%.
Regulator Travel Time
The time entered is compared with the actual travel time. If the valve is
sticking an error message is generated.
[0 to 5000 seconds, 0 = no check]
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