Danfoss EKC 315A Manual page 9

Manual
Miscellaneous parameters
Define valve and AO (analog output) signal
The controller can control 3 types of valves: pulse-width modulation valve AKVA,
motorized valve type ICM with ICAD motor-actuator, and discontinued valve type
TQ.
0: No valve selected
1: TQ valve (discontinued), AO is 0-20 mA for remote monitoring
2: TQ valve (discontinued), AO is 4-20 mA for remote monitoring
3: AKV/A valve, AO is 0-20 mA for remote monitoring
4: AKV/A valve, AO is 4-20 mA for remote monitoring
5: AKV/A valve, AO is signal for another controller. See appendix 3.
6: ICM/ICAD, AO is 0-20 mA for communication with valve
7: ICM/ICAD, AO is 4-20 mA for communication with valve (this is the default set-
ting in ICAD)
Note: the AO for remote monitoring (when ICM/ICAD is not used) corresponds to
the selection made in parameter o17 for what is to appear in the normal display.
Input signal from PLC, etc., for offsetting the thermostat setpoint or
superheat reference
Definition of function and input signal current range
0: No signal
1. Displacement of temperature reference with 0-20 mA
2. Displacement of temperature reference with 4-20 mA
3. Displacement of superheat reference with 0-20 mA
4. Displacement of superheat reference with 4-20 mA
NOTE: At minimum AI, there will be no offset. At maximum AI, the offset will be as
set in parameter r06.
Frequency
Must be set to the frequency of the 24 Vac power source.
Selection of normal display contents and AO
This parameter determines what will be shown in the normal display. While
viewing the normal display, briefly pushing the lower button will temporarily
display the following: if 1 has been selected, media temperature (S3); if 2 has
been selected, superheat; or, if 3 has been selected, temperature reference.
When the controller is not being used with ICM/ICAD or AKV/A as MASTER
(parameter o09=5, 6, or7), then the AO (analog output) on terminals 1 & 2 will
correspond to what is shown in the normal display.
1: Superheat
2: Valve's opening degree
3: Media temperature (S3 sensor)
Manual control of outputs
For service purposes, the individual relay outputs and the AKV/A output can be
overridden (forced ON), but only when regulation has been stopped. When this
setting is OFF, there is no override.
1) Relay to the solenoid valve is ON
2) AKV/A output is ON
3) Alarm relay is activated (shorts terminals 12 & 13
Minimum of pressure transmitter range
The working range of the pressure transmitter must be entered in gauge
pressure. The minimum value is set by this parameter and the maximum value by
the next.
Example: A transmitter with the specified range of 0 to 200 psia, must be entered
as -14.5 and 185 psig.
Maximum of pressure transmitter value range
(see above explanation)
© Danfoss USCO (HMR_MKS), 04-2008
EKC 315A Industrial Evaporator Controller
Description of setting
USCO.PD.RD0.A1.22 /521U0092
Parameter Minimum Maximum
o09 0 7
o10 0 4
0 1
o12
(50 Hz) (60 Hz)
o17 1 3
o18 0FF 3
-14.5 psig 870 psig
o20
(-1 bar) (60 bar)
-14.5 psig 870 psig
o21
(-1 bar) (60 bar)
Factory Field
setting setting
0
0
0
(50 Hz)
1
OFF
-14.5
psig
(-1.0
bar)
174
psig
(12 bar)
9