User manual

µC
2
SE process chiller +030220416 - rel. 2.2 - 25.01.2013
The parameters /13…/16 allow to correct the measurement shown on the display,
adding an offset of the measurement read by the probe: the value assigned to this
parameter is added to the probe if positive or removed if negative.
The parameter /21 allows to establish the coefficient used in digital filtering of the
value measured. High values of this parameter allow to eliminate any continuous
interference at the analogue inputs (but reduces measurement immediacy). The
value recommended is equal to 4 (default).
The parameter /22 allows to establish the maximum variation that can be detected
by the probes in a machine program cycle; practically, the maximum variations
allowed in the measurement are between 0.1 and 1.5 units (bar, °C or °F
depending on the probe and the unit of measurement) about every second. Low
parameter values allow to limit the effect of impulse type interference.
Recommended value 8 (default).
5.3 Probe reading
b00 allows to set the probe for standard display viewing.
b01…b04 are the values read by the probes B1…B4.
5.3.1 EVD
4
driver probes reading
The following displays appear only if an external EVD
4
driver is connected, which
transmits them to the controller via tLAN.
b09: driver evaporation temperature.
b10: driver evaporation pressure: value measured of the evaporation pressure.
b11: driver superheating = superheated gas temperature – evaporation saturate
temperature.
b12: saturation temperature = value calculated of the evaporation saturate
temperature.
b13: valve position as %.
b19: condenser output temperature probe.
5.4 Digital inputs
The inputs ID1…ID5 refer to the µC
2
SE controller. The inputs ID11…ID15 refer to
the I/O expansion board. The analogue input B4 can be configured as digital input
(par. P13).
The following digital inputs cannot be configured (see wiring diagram):
Regarding the alarm inputs, see the “Alarms” chapter.
P08: as well as the flow switch/pump thermal overload/general alarms with manual
or automatic reset, it is possible to configure the digital input for:
- the set point change from r01 to r21, limited by parameters r13 and r14
(minimum and maximum set-point);
- On/Off remote. Enabling is given by parameter H07.
P37: the digital inputs 11…15 of the I/O expansion board can be configured as:
- warning input Ad1…Ad5: causes only Ad1…Ad5 shown on display;
- alarm input Ad1…Ad5: causes the display of Ad1...Ad5 and unit switch-off.
The warnings/alarms Ad1...Ad5 can be used to switch-over the outputs
NO11,....NO15 of the I/O expansion board, along with the high pressure, low
pressure alarms, etc. See parameter P42 at the "Digital outputs" paragraph.
5.5 Digital outputs
Regarding the alarm outputs configuration, see the “Alarms” chapter. The following
digital output cannot be configured.
Parameter H11 allows associating the digital outputs to the unit actuators (see
table). The function of the other digital outputs can be configured from parameter.
Par. Description
Def Min Max U.M.
b00 Display
0 = Probe B1
1 = Probe B2
2 = Probe B3
3 = Probe B4
4, 5, 6 = Do not select
8= Set point without compensation
9 = Set point with compensation
10 = ID remote
11 = Do not select
0 0 11 -
b01 Probe B1 reading 0 0 0 °C/°F
b02 Probe B2 reading 0 0 0 °C/°F
b03 Probe B3 reading 0 0 0 °C/°F
b04 Probe B4 reading 0 0 0 °C/°F /bar
b09 Driver evaporation temperature 0 0 0 °C/°F
b10 Driver evaporation pressure 0 0 0 ba
r
b11 Driver overheating 0 0 0 °C/°F
b12 Driver saturation temperature 0 0 0 °C/°F
b13 Driver valve position 0 0 100 %
b19 Condenser output temperature probe 0 0 0 °C/°F
ID3 High pressure alarm inpu
t
ID4 Low pressure alarm inpu
t
Par. Description
Def Min Max U.M.
P08 Digital input 1
0=Not used
1=Flow switch alarm with manual reset
2=Flow switch alarm with automatic reset
3=General thermal overload alarm with
manual reset
4=General thermal overload alarm with
automatic reset
7=Thermal overload alarm with manual
reset
6=Thermal overload alarm with automatic
reset
7, 8, 9, 10 = Do not select
11=General alarm with manual reset
12=General alarm with automatic reset
13=2°Set-point
14…22=Do not select
23=On/Off remote
0 0 23 -
H07 Digital input On/Off
0/1=Absent/present
0 01-
r13 Minimum se
t
point -40 -40 r14 °C/°F
r14 Maximum se
t
point 80 r13 176 °C/°F
r21 Set-point from external contac
t
12 r13 r14 °C/°F
P09 Digital input 2
See P08
0 0 23 -
P13 Configuration of B4 as digital input if /4=1
See P08
0 0 23 -
P34 Digital input 5
See P08
0 0 23 -
P37 Digital input 11
0 = not connected
1…5 = Alarm Ad1…Ad5
6…10 = Warning Ad1…Ad5
0 0 10 -
P38 Digital input 12
See P37
0 0 10 -
P39 Digital input 13
See P37
0 0 10 -
P40 Digital input 14
See P37
0 0 10 -
P41 Digital input 15
See P37
0 0 10 -
NO1 Compressor outpu
t
18