3.2.- Basic settings
Type of operation
(only 1-relay controllers)
Specifies how the controller will control temperature (see page 10)
P0=0
Direct mode, refrigeration applications
P0=1
Reverse mode, heating applications
Type of inputs
(only 4-key controllers)
Some units have 3 programmable inputs to function as probes or as digital inputs as needed. This configuration
parameter is defined by P4, with the following options:
P4=1:
1 probe input (S1: control probe) + 2 digital inputs (D1 and D2).
P4=2:
2 probe inputs (S1: Control probe and S2: Defrost probe) + 1 digital input (D1).
P4=3:
3 probe inputs (S1: Control probe, S2: Defrost probe and S3: second defrost probe or product temperature)
(Only available on 4-relay units).
Probe types
(only available in thermometers and 1-relay controllers)
Parameter P9 permits selecting the type of probes to be connected between NTC (P9=0) and PTC (P9=1).
Probe function
S1:
Temperature control probe, controls temperature of the chamber or cabinet (SP) acting on the COOL/RES relay.
S2*:
Evaporator probe, controls the defrost end temperature (d4) and shuts down the fans (F0).
S3**:
Second evaporator or product temperature probe, controls defrost end temperature (d4) of a second
evaporator. If second defrosting is not configured (P6
¹
1),
* (Only available in 4-key controllers and if P4=2 or 3)
** (Only available in 4-relay controllers and if P4=3)
Probe to display:
Parameter P8 defines which probe is displayed on the controller screen (
P8=0
All probes sequentially,
P8=1
Probe
1,
P8=2
Probe 2 and
P8=3
Probe 3).
In the sequential mode the screen will display the name of each probe followed by the temperature of each.
(S1 - 8,3ºC - S2 - 6,2ºC - S3 - 9,4ºC)
Calibrating probe 1
Allows correcting a possible error in probe reading. This can be very useful when you cannot place it in the ideal place.
Display mode
Parameter P7 sets the display mode for the temperature displayed on the screen (
P7=0
No decimals in ºC,
P7=1
With a decimal in ºC,
P7=2
No decimal degrees in ºF,
P7=3,
with a decimal in ºF).
The changes in this parameter do not affect the operation of the system because the controller automatically
calculates equivalent values for the set point, locks, alarms, calibration, etc.
Upper/lower blocking of the set point
Sets the upper (C2) and lower (C3) thresholds for the set point value (SP). These limits are also valid for automatic
variations of the set point (C10 and C12).
it will function as product temperature probe.
8
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