Glossary
9–5
IP244
C79000–Y8576–C858–02
I
Integral action of the controller.
Integration time
Duration for measuring the input voltage.
Interpolation
Determination of intermediate values on the basis of known
boundary values of an interval.
L+
24 V connection positive pole (load voltage).
L–
24 V connection (reference point).
Limitation value
This value limits the influence of the master controller on
secondary controllers (in cascaded controls).
Line break monitoring
Monitors breaks in the wires to the temperature sensors
(thermocouples or Pt 100) and initiates the change over to a safe
operating mode, e.g. by switching over to a stand-by sensor.
Low byte
Less significant byte (DR) of a 16-bit data word (DW).
Lower setpoint
Second setpoint, e.g. to allow for a lower temperature control at
night.
Machine cycle
A production cycle (e.g. time required to inject a plastic part).
Main control byte
8-bit information unit to control the channel functions on the
module.
Manipulated variable Y
Percentage of the sampling time, obtained from the calculations
of the control algorithm (see ”Percentage output”).
Manual manipulated
Percentage time value for the operating time of the actuator
variable Y
H
output as value of manipulated variable when the controller is
switched off (manual operation).
Manual operation
The manipulated variable is not calculated by the controller (the
controller is switched off), but is specified by the operator or user
program as a percentage of the range of the manipulated
variable.
Master controller
See ”Cascaded Control”.
Message
Here, a data record (data block) 31 bytes long (for parameters,
measured values etc.).
Mixed operation
Here, simultaneous operation of normal and hot channel
controllers.
Multiplexer
Switch to select and connect an analog input channel to the ADC
and the module processor.
Operating point
The operating point is the required actual value which should
remain the same during control operation or whose system
deviation should become zero when using P controllers.
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