Xylem LOWARA e-SVE - RS485 Interface Parameters; Multi-Pump Configuration Parameters

en – Original instructions
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6.5.5 RS485 Interface Parameters
No.
Parameter
Unit of
measurement
Description
P50
Communication protocol [MOD,
BAC]
This parameter selects the specific protocol on the
communication port:
• NOD (MOD): Modbus RTU
• BAC (BAC): BACnet MS/TP.
Default: MOD.
P51
Communication protocol -
Address [1÷247]/[0÷127]
This parameter sets the desired address for the unit,
when connected to an external device, depending on
the protocol selected in P50:
• MOD: any value in the 1÷247 range
•
BAC: any value in the 0÷127 range.
P52
Comm Protocol – BAUDRATE
[4.8, 9.6, 14.4, 19.2, 38.4, 56.0,
57.6 KBPS]
kbps
This parameter sets the desired baud rate for the
communication port.
Default: 9.6 kbps.
P53
BACnet Device ID Offset [0÷999]
This parameter sets the hundreds, tens and units of
the BACnet Device ID.
Default: 002.
Device ID default: 84002.
P54
Comm Protocol – Configuration
[
8N1
,
8N2
,
8E1
,
8o1
]
This parameter sets the length of the data bits, the
parity and the length of the STOP bits.
6.5.6 Multi-pump configuration parameters
All these parameters affect MSE and MSY control modes.
No.
Parameter
Unit of
measurement
Description
P55
Multipump – Address
[1÷3]
This parameter sets the address of each pump based on the
following criteria:
• Each pump needs an individual pump address (1÷3)
• Each address may only be used once.
Default: 1.
P56
Multipump – Max
Units [1÷3]
This parameter sets the maximum number of pumps operating at
the same time.
Default: 3.
P57
Multipump – Switch
Interval [0÷250]
h
Setpoint of the main pump forced switch interval.
If the pump with priority 1 works in continuous mode until this time
is reached, the switch between this pump and the next is forced. If
on the other hand, the system stops completely due to the setpoint
being reached, with the next start priority 1 will be assigned in a way
to ensure an even distribution of the operating hours of all pumps.
Default: 24 h.
P58
Multipump – Actual
Value Increase
[0.0÷25.0BAR] /
[0.0÷363PSI]
bar/psi
This parameter affects the calculation of P02, to improve the
Multipump control as described in paragraph 6.6.3.
Default: 0.35 bar.
P59
Multipump – Actual
Value Decrease
[0.0÷25.0BAR] /
[0.0÷363PSI]
bar/psi
This parameter affects the calculation of P02, to improve the
multi-pump control as described in paragraph 6.6.3.
Default: 0.15 bar.
P60
Multipump – Enable
Speed [P27÷P26]
rpmx10
This parameter sets the speed that a pump must reach before
starting the next assist pump, after a system pressure drop below
the difference between P02 and P59.
Default: depending on the type of pump.