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PCL
Pleiger Elektronik GmbH & Co. KG
www.pleigerelektronik.de
Fon +49 2324 398 333
12
/
65
Pleiger Control Loop
Manual version 2018-03
5.2 Valve Control Function
The kind of control algorithm is determined by the PCL master on slave start-up
(if the actuator isn’t
operated by local control box
1
). At present 17 different actuator types are supported:
Abbreviation Description
EHS_D
standard double acting valve
EHS_DK
double acting valve operating in continuous mode
EHS_SO
single acting valve, spring open
EHS_SC
single acting valve, spring close
EHS_SOK
single acting valve, spring open, operating in continuous mode
EHS_SCK
single acting valve, spring close, operating in continuous mode
EHS_SCO
single acting valve, spring close with mechanical override
EHS_SOO
single acting valve, spring open with mechanical override
MOV
standard motor valve
QC_SC
single acting valve, spring close, with external quick close circuit
QC_SO
single acting valve, spring open, with external quick open circuit
EHS_SCH
single acting valve, spring close with electro-hydraulic override
EHS_DQ
double acting valve with separated hydraulic unit
EHS_SCQ
single acting valve with separated hydraulic unit, requires additional relay
QC_SCQ
single acting valve with separated hydraulic unit, requires additional relay
external coil supply for quick closing function required
EHS_DEx
double acting valve for use in hazardous area, requires additional CM-ExE module
EHS_DKEx
double acting valve for use in hazardous area with analog feedback, requires addi-
tional CM-ExE module
EHS_DOS
double acting valve, opening in two steps (time adjustable by auxiliary parameters)
EHS_SC_Step single acting valve, spring close with step close function
EHS_SCO2 single acting valve, spring close with hydraulic override
Type QC_SC and QC_SCK are especially intended for valves within a quick close system.
5.2.1 PCL-VCI versions
Up to hardware version 3 only 14 actuator types have been supported (up to
EHS_DEx
).
The actuator type
EHS_SCO
is only implemented in VCI-
cards type 1 / 2 up to firmware v3.1. It’s no
more implemented in v3.5 and newer!
To handle actuator type
EHS_SC_Step
a card with v3.7 (or newer) is recommended.
If one of the valve types greyed in the upper list should be operated, please contact the Pleiger El-
ektronik GmbH for further information.
1
Actuators with VCI cards v3-3 / v3-4 can be operated with a local control box independent of the
state of the PCL master. Therefore the last valid actuator configuration is saved by the VCI card.