Val Controls IHP24-A, Руководство пользователя

Страница: 26 / 38

DHP-UM-020
Val Controls A/S
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Limfjordsvej 3
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DK-6715 Esbjerg N
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Tel. +45 7547 0600
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Fax +45 7547 0611
vc@valcontrols.com
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www.valcontrols.com
Revision: 12
26/38
6 Regulators
6.1 Electronic stepping
Electronic stepping is used to operate a standard double acting or spring return actuator in a
stepping mode replicating the functionality of a stepping actuator.
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Set the Regulator type to “Electronic stepping” through ValConnect
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Perform an auto calibration
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Set the extra “Off-times” to increase the duration of the stroke
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Open off-time extra
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Close off-time extra
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Fail step: Set desired action in case of loss of control loop or position signal
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Open end pulses: Number of pulses after the position has reached full open
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Close end pulses: Number of pulses after the position has reached full close
6.2 Mechanical stepping
The configuration of a mechanical stepping is to be done through ValConnect. The recommended
settings when setting up a IHP24 with a stepping actuator is:
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Regulator type: Mechanical stepping
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Dead band: 2 %
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Open on-time: 5 sec
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Close on-time: 5 sec
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Open off-time: 5 sec
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Close off-time: 5 sec
The following parameters can be used to tune the functionality of the regulator
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Fail step: Set desired action in case of loss of control loop or position signal
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Open end pulses: Number of pulses after the position has reached full open
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Close end pulses: Number of pulses after the position has reached full close
6.3 Proportional
Configuration
In configuration the user can change the setup of the positioner.
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Valve function: Configures how the valves operate during open, close and stay-put. The
proportional output can be configured in three ways.
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AO1 : 4 mA is full close, 12mA is stay-put and 20mA is full open.
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AO2 : 4 mA is full close, 12mA is stay-put and 20mA is full open.
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AO1 and AO2 AO1= 20mA, AO2= 4mA is full close.
AO1= 4mA, AO2 = 20mA is full open.
AO1= 4mA, AO2= 4mA is stay-put.