
GOSSEN METRAWATT GMBH
23
Configuration of the Controller with Continuous Output (desig. A7 and A8)
• Continuous output = actual value (“sensor U/M / continuous output” configuration digit = 0, 1, 2, 3)
–
The controller sorts demonstrate the same performance characteristics as with designations A1 to A4.
–
Read-out of the actual value (actual value difference for differential controllers) is scaled with the
rnL
and
rnH
parameters.
• Continuous output = manipulating factor (“sensor U/M / continuous output” configuration digit = 4, 5, 6, 7)
–
Switching output I is inactive.
–
The various continuous controller sorts result from the “controller sort” configuration digit:
• Continuous output = “select with
Cont
” (“sensor U/M / continuous output” configuration digit = 8, 9, A, b)
Code
Controller Sort
Comment
Limit transducer
Read-out of a manipulating factor which can be adjusted with the
Y H
parameter
where actual value < setpoint
Actuator
Read-out of a manipulating factor which can be adjusted with parameter
Y St
.
Continuous controller with falling char-
acteristic curve
A harmonic-free PDPI control algorithm regulates the continuous output every
0.5 seconds. An output filter assures smoothest possible actuating signal char-
acteristics.
tc
is used to set the time constant for an additional actual value filter.
Continuous controller with rising char-
acteristic curve
Split range controller
Continuous controller with falling characteristic curve for positive manipulating
factors (increase actual value). Negative manipulating factors are read out via
switching output II (decrease actual value).
The actuating cycle for switching output II has a duration of at least
tc
. The dead
band
dbnd
suppresses rapid switching back and forth between the continuous
output and switching output II if no lasting deviation occurs.
,
No practically relevant function
Cont
Cont. Output
Comment
Current setpoint
The read-out is scaled with the
rn L
and
rn H
parameters (the current differential setpoint for differ-
ential controllers).
The controller sorts demonstrate the same performance characteristics as with designations A1 to A4.
“Cooling”
manip. factor
Negative manipulating factors are read out continuously, and switching output II remains inactive.
Controller sort = 4: split range controller with inverted output performance