Siemens SIMATIC S5 Manual page 320

Glossary
Control byte
Conversion time t
w
Correction profile
CPKL
CPU
Cumulative setpoints
D
Data block DB
Disturbance response
Dual-slope technique
Encoding time
EPROM
Error byte
Evaluation factor F
Firmware
Function block
Group short circuit indication
Heating-cooling ratio
High byte
Hot channel control
9–4
Eight-bit information unit to control channel functions, where
each bit is assigned to a different function.
Corresponds to encoding time.
In cascaded control, the degree of influence of the master
controller on the secondary controllers can be selected by means
of an evaluation factor separately for each controller. This
produces a correction profile.
Central processor ready (CPKL = 1 causes a reset).
Central processing unit
These are the setpoints actually effective in secondary control
loops (in cascaded control).
Derivative action of the controller.
Data list with values and parameters for the function block.
Control reaction to a disturbance in the control system (e.g.
change of the load, increase of the through-put etc.). The
controller is assigned parameters to quickly compensate the
disturbances to achieve a uniform quality.
Technique for analog-to-digital conversion. The measured
voltage is integrated over 20 ms or 16 2/3 ms followed by the
downward integration of a reference voltage to zero. The
measured voltage is proportional to the duration of the reference
integration.
Period of time between the start and end of an analog-to-digital
conversion.
Program memory, contains the controller program of the IP 244;
can only be read from.
Eight-bit information unit; each bit is assigned to a particular error
(1 = error).
Determines the amount of influence of the master controller on a
certain subsequent controller (in cascaded controls).
Operating program stored on the module in the EPROM.
Program module in the SIMATIC S5 programmable controller.
Red LED, indicates when there is a short circuit at one of the
digital outputs.
Ratio (parameter) to compensate for differences in heating and
cooling times with 3-step controllers to balance the adjustment
response.
More significant byte (DL) of a 16-bit data word (DW).
Special control action for plastic injection molding machines.
IP244
C79000–Y8576–C858–02