wtw DIQ/S 182-XT-4, Operating Manual

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System 182-XT-4 Outputs
6 - 29 ba75753e06 12/2014
By activating or deactivating the Integral (ti) and Differential (td)
controller part, the following controller types can be configured:
Characteristic curve of
the proportional
controller
For a pure P controller the correlation between the measured value and
current I on the controller output results in the following characteristic
curve:
Fig. 6-13 Proportional controller (negative characteristic curve)
The proportional range Xp is limited by the measurement range of the
linked sensor. If a value is entered for the parameter Xp that is greater
than zero, the controller has a negative characteristic curve (example
Fig. 6-13). To obtain a positive characteristic curve, a negative value
must be entered for Xp.
Controller type td [s] ti [s]
P controller 0 0
PI controller 0 1 to 9999
PD controller 1 to 9999 0
PID controller 1 to 9999 1 to 9999
0
Imin
Imax
Current I [mA]
Measured value Nominal value
Io
Xp