SPECIAL FUNCTIONS
Boost-Function
The boost function provides a short-term
increase of the set-point, e.g. with hot
runner control, in order to clear nozzles
of “frozen” rests of material.
Start-up circuit
For temperature control, e.g. with hot
runners. High-performance heating
elements with magnesium oxide
insulation must be heated slowly, to
remove any humidity and to prevent
destruction.
Modbus Master
The KS 90-1 can be configured as
Modbus Master. This enables it to
transmit user-specified signals or
parameters cyclically to all connected
Slave controllers. For example, the
following applications are possible:
•
Set-point shifting relative to the
set-point adjusted in the Slave (see
picture)
•
matching of control parameters, limit
contacts, etc.
•
Limiting the output value (override
control OVC)
•
...
LIMIT SIGNALLING FUNCTIONS
Max., Min. or Max./Min. monitoring with
adjustable hysteresis.
Signals which can be monitored:
•
Process value
•
Control deviation
•
Control deviation with suppression
during start-up or set-point changes
•
Effective set-point
•
Output signal Y
•
Control deviation always compared to
internal setpoint SP even if SP2 or
SP.E is activated.
Functions
•
Input signal monitoring
•
Input signal monitoring with latch
(reset via front key or digital input)
•
Adjustable discriminator time of
0...9999 seconds
Several limit signals or alarms can be
OR-linked before being output.
Applications: Release of a brake with
motor actuators, general alarms, etc.
ALARMS
Heating current alarm
•
Overload and short circuit
•
Open circuit and short circuit
Limit value adjustable 0...9999 A
Control loop alarm
Automatic detection if there is no
response of the process to a change of
output value.
Sensor break or short circuit
Depending on selected input type, the
input signal is monitored for break and
short circuit.
MAINTENANCE MANAGER
Display of error signals, warnings, and
latched limit messages in the error list.
Signals are latched, and can be reset
manually.
Possible signals in the error list:
Sensor break, short circuit, reversed polarity
Heating current alarm
Control loop alarm
Fault during self-tuning
latched limit messages
e.g. re-calibration warning
(If the adjusted operating hours are exceeded a
message is displayed)
e.g. maintenance interval of actuator
(If the adjusted switching cycles are exceeded a
message is displayed)
Internal fault (RAM, EEPROM, ...)
OPERATION AND DISPLAY
Display
Process value: LED with 7 segments, 10,5 mm
Lower display: LED with 7 segments, 7,8 mm
Operating functions
The functions of the
Ò
-key and the
è
-key are configurable:
Function
Ò è
Remote (no front operation)
X
SP.2 (2nd setpoint)
X
Y.2 (2nd output value)
X
X
SP.E (external setpoint)
X
X
Manual operation
X
X
C.OFF (controller function off)
X
X
Lock of manual key
X
Reset of latched limits and error list
X
X
Boost
X
Parameter set ½
X
Programmer run/stop
X
Several functions can be combined e.g.
SP.2 and parameter set switch-over
(gain scheduling) with only one key.
KS 50-1
5
KS 50-1
universal
1
2
3
OK
125
126
SP.X
run
Err
Ada
F
green “OK”-LED
process value
Programm run
selftuning is active
error list
setpoint, actuating value, parameter
Enter-key
operation keys
3 yellow LEDs for the output states
second or external setpoint
ramp is active
automatic/manual-key
configurable function-key
front interface
manual operation
BluePort
Display and operation:
125
126
SP.x
run
Ada
Err
Flashing Error LED indicates active alarm
in the error list:
