Working Pressure Control; Spray - LU-VE Emeritus LU1W Manual De Usuario

12.1 Spray

If the water pressure detected by the probe on the spray circuit is lower than a threshold defined by parameter PR16
(design pressure), the operation of the nozzles is compromised and an intervention procedure takes place.
Compared to PR16 threshold:
•
If the pressure is higher than PA22%, no action.
•
If the pressure is lower than PA22% but higher than PA23%, only warning.
•
If the pressure falls below PA23%:
Spray fields are deactivated progressively, and the controller returns a limiting alarm;
o
After disabling all sprayers, the controller goes into the spray reset alarm with manual reset.
o
Parameter PA21 enables control of the spray system wet pressure. By means of parameter PA20, however, it is
possible to set a delay between the activation of the spray system and pressure control to consider the stroke times of
the motorized valves and the start times of the high-pressure pump (if present).
PARAMETER
NAME
Design spray supply water
PR16
pressure
PR17
Differential spray water pressure
PA20
Spray water pressure control delay
Enable spray water pressure
PA21
control
Spray water pressure control
PA22
warning percentage threshold
Spray water pressure control
PA23
limit/block percentage threshold
Delay between requests for
PA24
disabling of spray sectors
MODBUS Registers
MODBUS MODBUS
Name and Description
Register Register
Parameter
Base 0 Base 1
PR16
Design spray supply
0x0788 1929 water pressure
PR17
Differential spray water
0x0789 1930 pressure
PA20
Spray water pressure
0x083D 2110 control delay
PA21
Enable spray water
0x07FF 2048 pressure control
LU1W - User Manual

12 WORKING PRESSURE CONTROL

DESCRIPTION
Data Type and Notes
[pressure unit as set by
default PH03 default bar]
- short int
[pressure unit as set by
default PH03 default bar]
- short int
[sec]
- unsigned short int
0 = disabled,
1 = enabled
- unsigned short int
DEFAULT MIN
VALUE VALUE
3.0 0
1.0 0.0
60 1
Yes No
75.0 PR73
50.0 0.0
60 1
Default
value
3.0
1.0
60
1
95
MAX
UM
VALUE
20.0 Bar
Bar
3.0
Sec
9999
-
Yes
%
100.0
%
PR72
Sec
9999
Decimal
Min Max
positions
0.0 290.0
0.0 3.0
0 9999
0 1
REV.1.1 – 07/11/2017 - ENG
MENU
ADVANCED →
REGULATION
ADVANCED →
REGULATION
ADVANCED →
SAFETIES
ADVANCED →
SAFETIES
ADVANCED →
SAFETIES
ADVANCED →
SAFETIES
ADVANCED →
SAFETIES
MODBUS
Register
Type
0.0 holding
0.0 holding
0 holding
0 holding