Grundfos Conex DIS-D Montage- Und Betriebsanleitung Seite 22

9.6.8 Controller configuration
1. Switch the controller on/off using code 20:
– Code 2000: controller off.
– Code 2001: controller switched on, SP
(setpoint) is not adjustable.
– Code 2002: controller switched on, SP
(setpoint) is adjustable.
See section 9.3.3 SP
2. Select the control direction using code 21:
– Code 2100: control direction upwards
(switches with downward violation of limit/
setpoint)
– Code 2101: control direction downwards
(switches with upward violation of limit/
setpoint).
3. Select the controller type using code 22:
– Code 2200: limit monitor
– Code 2201: interpulse controller
– Code 2202: pulse frequency controller
– Code 2203: continuous controller.
4. Press [OK] to confirm.
After a power interruption the controller
Note
starts with a delay of 10 seconds to avoid a
malfunction during the start.
9.6.9 Current output
Two standardized ranges "0 to 20 mA" and "4 to 20
mA" are available as the current output. These are
assigned linearly to the measuring range.
1. Set the current output range using code 23:
– Code 2300: 0 to 20 mA
– Code 2301: 4 to 20 mA.
2. Press [OK] to confirm.
The measured value is present at the
current output if a limit monitor, interpulse
controller or pulse frequency controller is
Note
selected.
The controller signal is present at the
current output if a continuous controller is
activated.
22
menu.
9.6.10 Controller parameterisation
The controller selected in
configuration is parameterised in the code area
CTRL. Only the codes and parameterisation facilities
matching the controller are made available.
Code 10 Xp (proportional band) in %, 0.1 to
3000.0 %,
resolution 0.1 % in the band 0.1 to 100.0
%,
resolution 1 % in the band 101.0 to
3000.0 %
Code 11 Tn (reset time) in sec, 0 to 3000 s,
resolution 1 s
Code 12 Hysteresis in physical dimension, 0 to 50
% of full-scale value, adjustable in
physical dimension of measured value
Code 13 Interpulse period in sec, 1 to 100 s,
resolution 1 s
Code 14 Min. ON period in sec, 0.1 to 10.0 s,
resolution 0.1 s
Code 15 Max. frequency in pulses/min, 1 to 220
pulses per minute, pulse width 50 ms
Code 16 Setpoint/limit in physical dimension, 0 to
100 % of measuring range
1. Press [OK] to confirm the selected code.
2. Use the [Up] or [Down] button to modify the
displayed value within the adjustable range.
3. Press [OK] to confirm.
If the reset time Tn is set to 0, the
controller reacts like a pure P controller. If
Note
the proportional band XP is set to 0.0 %,
the controller reacts like a limit monitor.
9.6.11 Adjustment of alarm value
1. Select code 70, and set code 7002 (alarm value
on). Press [OK] to confirm.
2. Select the switching direction using code 71:
– Code 7101: downward violation
– Code 7102: upward violation.
3. Enter the alarm value using code 72:
– Dimension mg/l for Conex
– Dimension pH for Conex
system
– Dimension mV for Conex
sensor system.
• The alarm function has an automatic hysteresis
of 2.5 % of the selected measuring range.
9.6.8 Controller
®
DIS-D
®
DIS-PR, pH sensor
®
DIS-PR, redox