How to Assign a MODBUS Address
Parameters • 15
tdA
Type of alarm signaled by relay
(
ALL
,
SH
,
PrE
,
di
)
ALL
= all alarm;
SH
= superheat alarm;
PrE
= pressure alarm;
di
= ac-
tivation only when digital input configured as
rL
is activated.
LPL
Lower pressure limit for super-
heat regulation
(
PA4
to
P20
bar/ psi)
When the suction pressure comes down to
LPL
, the regulation is per-
formed with a
LPL
fixed value for pressure; when the pressure comes
back to
LPL
, the normal pressure value is used. (related to
PrM
param-
eter).
MOP
Maximum operating pressure
threshold
(
PA4
to
P20
bar/ psi)
If the suction pressure exceeds the maximum operating pressure value,
the controller signals a condition with a High Pressure alarm LED (relat-
ed to
PrM
parameter).
LOP
Lowest operating pressure
(
PA4
to
P20
bar/ psi)
If the suction pressure comes down to this value, a low pressure alarm is
signaled with Low Pressure alarm LED (related to
PrM
parameter).
PHY
Pressure alarm hysteresis
(0.1 to 5.0 bar/ 1 to 72 PSI)
Alarm hysteresis to disable alarm signaling.
dML
delta
MOP
-
LOP
(0 to 100%)
When a
MOP
alarm occurs, the valve will close at the
dML
percentage
every one second until the
MOP
alarm is active. When
LOP
occurs, the
valve will open at the
dML
percentage every one second until
LOP
alarm is active.
MSH
Maximum superheat alarm
(
LSH
to 32.0°C/
LSH
to 176°F)
When the superheat exceeds this value, a high superheat alarm is sig-
naled after interval
SHd
.
LSH
Lowest superheat alarm
(0.0 to
MSH
°C/ 32 to
MSH
°F)
When the superheat goes down to this value, a low superheat alarm is
signaled after interval
SHd
.
SHy
Superheat alarm hysteresis
(0.0 to 25.5°C/ 1 to 77°F)
Hysteresis for superheat alarm deactivation.
SHd
Superheat alarm activation de-
lay
(0 to 255 sec)
When a superheat alarm occurs, the time
SHd
has to pass before signal-
ing alarm.
FrC
Fast-recovery constant
(0 to 100 sec)
Increases the integral time when
SH
is below the setpoint. If
FrC
=
0
,
fast-recovery function is disabled.
DISPLAY
Lod
Local display
Display: (
SH
,
PEr
,
P1
,
P2
)
SH
= superheat;
PEr
= valve opening percentage;
P1
= value of temper-
ature measured;
P2 =
pressure measured by P2 probe;
CF
Temperature measurement
units
(°C to °F)
°
C
= Celsius degree;
°F
= Fahrenheit degree
CAUTION! By changing the measurement unit, the regulation parame-
ters have to be changed correctly.
PMU
Pressure measurement units
(
bAr
,
PSI
)
bAr
= bar;
PSI
= psi
CAUTION! By changing the measurement unit, the regulation parame-
ters have to be changed correctly.
rES
Resolution (only °C)
(
dE
to
in
)
Whether a whole number or decimal point is used in temperature reading
Code
Description
Function
Table 10-1 - List of Parameters
