2009-09-30
Data Sheet 70.3041
Page 3/10
Program function
A setpoint profile can be implemented with a maximum of 8 program segments. The settings
for the segment setpoints (SPP1 — SPP8) and segment times (tP1 — tP8) are carried out at the
user level. The time scale can be configured as mm:ss or hh:mm (s = seconds, h = hours).
A program-end signal can be generated, and the program can be halted or canceled.
Further functions can be defined through the setup program (start at process value, cyclical
program handling, segment-by-segment assignment of parameter sets and four control
contacts). The program profile can also be visualized.
Warm-up ramp for hot-channel controller
The warm-up ramp for hot-channel equipment is used, for example, for the gentle operation of
ceramic heater elements. Damage can be avoided by allowing moisture to evaporate slowly
from the hygroscopic heater elements during the warm-up phase.
Parameter level
All the parameters and their meanings are included in the table. Some parameters may be missing or meaningless for a particular type
of controller. Two parameter sets can be stored, to handle special applications.
Parameter
Value range
Factory
setting
Meaning
Proportional band
0 to 9999 digits
0 digits
Size of the proportional band
0 means that the controller structure is out of action!
Derivative time
0 to 9999 sec
80 sec
Influences the differential component
of the controller output signal
Reset time
0 to 9999 sec
350 sec
Influences the integral component of the controller output
signal
Cycle time
0 to 999.9 sec
20.0 sec
When using a switched output, the cycle time should
be chosen so that the energy flow to the process is as
continuous as is practicable without overloading the switching
elements.
Contact spacing
0 to 999.9 digits
0.0 digits
The spacing between the two control contacts for 3-state or
modulating controllers
Switching differential
0 to 999.9 digits
1.0 digits
Hysteresis for switching controllers
with proportional band = 0
Actuator time
5 to 3000 sec
60 sec
Actuator time range used by the control valve for modulating
controllers
Working point
-100 to +100%
0%
The output level for P and PD controllers (if x = w then y = Y0)
Output level limiting
0 to 100%
100%
The maximum limit for the output level
-100 to +100 %
-100%
The minimum limit for the output level
Interfaces
RS422/RS485 interface
The serial interface is used for communication
with higher-level (supervisory) systems.
The Modbus protocol is used for
transmission.
PROFIBUS-DP
The Profibus-DP interface can be used to
integrate the controller into a fieldbus system
operating according to the Profibus-DP
standard. This Profibus version is especially
designed for communication between
automation systems and decentralized
peripheral devices at the field level, and
optimized for speed.
Data transmission is made serially, using the
RS485 standard.
GSD generator, the project-planning tool that
is supplied with the package (GSD =
Gerätestammdaten, i.e. device data), is used
to make a selection of device characteristics
for the controller to create a standardized
GSD file that is used to integrate the controller
into the fieldbus system.
Содержание Typ BR 058-31
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