Customer settings M0041
Process controller M0742
Rate time Td M0746
Default value:
0 s
(seconds)
Setting range:
1 ... 100 s
8.7.11.
Actual value source (input for actual process value)
Customer settings M0041
Process controller M0742
Actual value source M0756
Default value:
I/O interface
Setting values:
I/O interface
The actual process value is defined via an analogue input (AIN 1 or AIN 2) of the
I/O interface.
Fieldbus interface
The actual process value is defined via the fieldbus.
8.7.12.
Speed source for actual process value
The actuator speed for control via the actual process value can be specified by
different sources.
Customer settings M0041
Process controller M0742
Speed source PID M1968
Default value:
Fieldbus
Setting values:
Fieldbus
The actuator speed is specified externally, via fieldbus. For this, four constant speed
values which may be programmed via fieldbus are available.
Internal 1
–
Internal 4
The actuator is controlled with a constant speed. For this, four programmable internal
speed values are available. The four internal speed values are programmed via
parameters
Speed internal1 M1930
–
Speed internal 4 M1933
.
2 DigIn: "Internal (1-4)"
External speed selection. For this setting, two external signals may be used to change
between the four internally programmed, constant speeds (
Internal 1
–
Internal 4
).
Two digital inputs have to be configured as control signals for speed selection.
Analogue input
The actuator speed is specified/modified externally via an analogue value (e.g. 0 –
20 mA). An analogue input has to be defined as speed source.
The speed range for the analogue input is determined via parameters
Speed rem.
min. M1936
and
Speed rem. max M1937
.
8.8.
Stepping mode
Conditions
This function requires one of the following equipments within the actuator:
●
Electronic control unit (non-intrusive version)
●
Potentiometer
●
Electronic position transmitter EWG/RWG
Characteristics
●
With stepping mode, the operating time can be increased for the entire or any
portion of the valve travel.
●
Stepping mode can be individually activated for the directions OPEN and
CLOSE.
72
Actuator controls
Application functions
ACV 01.2/ACVExC 01.2 Profibus DP