Siemens SIMATIC S5 Manual page 321

I
Integration time
Interpolation
L+
L–
Limitation value
Line break monitoring
Low byte
Lower setpoint
Machine cycle
Main control byte
Manipulated variable Y
Manual manipulated
variable Y
H
Manual operation
Master controller
Message
Mixed operation
Multiplexer
Operating point
IP244
C79000–Y8576–C858–02
Integral action of the controller.
Duration for measuring the input voltage.
Determination of intermediate values on the basis of known
boundary values of an interval.
24 V connection positive pole (load voltage).
24 V connection (reference point).
This value limits the influence of the master controller on
secondary controllers (in cascaded controls).
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.
Less significant byte (DR) of a 16-bit data word (DW).
Second setpoint, e.g. to allow for a lower temperature control at
night.
A production cycle (e.g. time required to inject a plastic part).
8-bit information unit to control the channel functions on the
module.
Percentage of the sampling time, obtained from the calculations
of the control algorithm (see "Percentage output").
Percentage time value for the operating time of the actuator
output as value of manipulated variable when the controller is
switched off (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.
See "Cascaded Control".
Here, a data record (data block) 31 bytes long (for parameters,
measured values etc.).
Here, simultaneous operation of normal and hot channel
controllers.
Switch to select and connect an analog input channel to the ADC
and the module processor.
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.
Glossary
9–5