Burkert Type 8791 - Manual (Page 19)

19
Function
7.4. properties of the position controller software
7.4.1. functions i
• Activation via DIP switches
• Parameter setting via communications software
additional function effect
Sealing function
CUTOFF Valve closes tight outside the control range. Specification
of the value (as %) from which the actuator is completely
deaerated (when 0%) or aerated (when 100%)
(see chapter entitled “9.3.2. Function of the DIP
switches”).
Correction line to adjust the operating characteristic
CHARACT The process characteristic may be linearized
(see chapter entitled “9.3.2. Function of the DIP
switches”).
Effective sense of direction of the controller nominal
value
DIR.CMD 1)
Reversal of the effective sense of direction of the set-point
value (see chapter entitled “9.3.2. Function of the DIP
switches”).
Table 2: Functions I
1)
DIR.CMD can be accessed in read-only mode via the communications software.
This function is set via the DIP switch only, as the function has no other parameters.
7.4.2. functions ii
• Activation and parameter setting via communications software
additional function effect
Standard signal for set-point value
INPUT Select set-point value standard signal.
Effective direction of the actuator
DIR.ACTUATOR Assignment of the aeration state of the actuator
chamber to the actual position.
Signal split range
SPLITRANGE Standard signal as % for which the valve runs through
the entire mechanical stroke range.
Mechanical stroke range limit
X.LIMIT Limit the mechanical stroke range.
Opening and closing time
X.TIME Limit the control speed.
Position controller
X.CONTROL Parameterize the position controller.
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Type 8791