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.
• Set the Regulator type to “Electronic stepping” through ValConnect
• Perform an auto calibration
• Set the extra “Off-times” to increase the duration of the stroke
o Open off-time extra
o Close off-time extra
• Fail step: Set desired action in case of loss of control loop or position signal
• Open end pulses: Number of pulses after the position has reached full open
• 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:
• Regulator type: Mechanical stepping
• Dead band: 2 %
• Open on-time: 5 sec
• Close on-time: 5 sec
• Open off-time: 5 sec
• Close off-time: 5 sec
The following parameters can be used to tune the functionality of the regulator
• Fail step: Set desired action in case of loss of control loop or position signal
• Open end pulses: Number of pulses after the position has reached full open
• 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.
• Valve function: Configures how the valves operate during open, close and stay-put. The
proportional output can be configured in three ways.
o AO1 : 4 mA is full close, 12mA is stay-put and 20mA is full open.
o AO2 : 4 mA is full close, 12mA is stay-put and 20mA is full open.
o AO1 and AO2 AO1= 20mA, AO2= 4mA is full close.
AO1= 4mA, AO2 = 20mA is full open.
AO1= 4mA, AO2= 4mA is stay-put.
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