TZIDC, TZIDC-200
| COI/TZIDC/TZIDC-200-EN 15
3.6
Parameter group 2: Setpoint
3.6.1
MIN_RGE – Setpoint range min.
The setpoint range is the input current range as a percentage
of the working range for the valves and
fi
ttings (from
0 ... 100 %).
NOTE
The con
fi
gured setpoint range must not be smaller than
20 % (3.2 mA).
Use the
MIN_RGE
parameter to determine the lower limit of
the setpoint range. You can ente r a value within the admissible
value range of 4 ... 18.4 mA, with one decimal.
3.6.2
MAX_RGE – Setpoint range max.
The setpoint range is the input current range as a percentage
of the working range for the valves and
fi
ttings (from
0 ... 100 %).
NOTE
The con
fi
gured setpoint range must not be smaller than
20 % (3.2 mA).
Use the
MAX_RGE
parameter to determine the upper limit of
the setpoint range. You can ente r a value within the admissible
value range of 5.6 ... 20 mA, with one decimal.
Setting examples
Setpoint Range
Min. = 8.3 mA, Max. = 15.6 mA
Split range con
fi
guration between
Min. = 12.0 mA, Max. = 20.0 mA
3.6.3
CHARACT – Characteristic curve
Use this parameter to select a function that adjusts the
behavior of the positioner to the analog input signal according
to a prede
fi
ned course.
This linearizes the characteristi c curves for the valves and
fi
ttings and improves the behavior of the overall control loop.
In addition to
fi
ve prede
fi
ned characteristic curves, you can
also select a user-con
fi
gurable characteristic curve, which can
only be generated and saved in the device via a PC with the
appropriate con
fi
guration program (and not locally).
Selection
LINEAR
Linear
EP 1/25
equal percentage 1:25
EP 1/50
equal percentage 1:50
EP 25/1
equal percentage 25:1
EP 50/1
equal percentage 50:1
USERDEF
con
fi
gurable by user
USERDEF
LINEAR
3.6.4
ACTION – Direction of action (setpoint signal)
The direction of action describes the relationship between the
analog setpoint and pneumatic output
OUT1
.
Increasing
Setpoint 0 ... 100 %
Î
Output 0 ... 100 %
Decreasing
Setpoint 0 ... 100 %
Î
Output 100 ... 0 %
Selection
DIRECT
Increasing
Control signal 4 ... 20 mA, and
setpoint 0 ... 100 % = position 0 ... 100 %
REVERSE
Decreasing
Control signal 20 ... 4 mA, and
setpoint 100 ... 0 % = position 0 ... 100 %
conf
conf
conf
mA
%
C
°
conf
mA
%
C
°
conf
mA
%
C
°