IMP PUMPS NMT Max C - Pump Control Register Block

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7.9. PUMP CONTROL REGISTER BLOCK
Registers in this block are read with either function codes 0x03 or 0x04. They can be written as holding
registers with function codes 0x06 and 0x10.
Address
Register name
Range
Description
101
ControlReg
b0:
RemoteAccess
Control bit that sets local or remote control.
Setting this bit will enable pump control over
Modbus.
0 = Local
1 = Remote (controlled by Modbus master).
b1:
OnOffReq
Control bit that switches the pump on or off.
0 = Off (stop)
1 = On (start).
b2..3: RESERVED
-
b4:
Control bit saves values in register block as default.
0 = No save
1 = Save as default. This value will be reverted back
to 0 when set.
b5..15:
RESERVED
-
102
AltControlMode
Alternative Control mode. Use of register 108 is
preferred.
Sets the control mode enumeration.
0 = ConstantRPM
1 = ConstantRPM
3 = ConstantHead
4 = ConstantHead
5 = ConstantHead
6 = ProportionalHead
128 = AutoHeadMode
NOTE: values outside this range reserved.
103
OperationMode
RESERVED
104
SetPoint
0..
10000
Sets desired pump set point.
0 will stop the pump. 10000 will set the pump to
maximum output for desired mode.
Values outside of valid range will cause the pump
to operate with front panel set values.
105
RelayControl
0..2
Configures relay output.
0 = indicates fault
1 = indicates pump ready
2 = indicates pump operation
See section “5 Relay output ”.
106..107
RESERVED
108
ControlMode
0..3
Sets the pump control mode.
0 = AutoHeadMode (Automatic head mode)
1 = ProportionalHead (Head proportional to flow)
2 = ConstantHead (Head is kept constant)
3 = ConstantRPM (Speed is kept constant)
NOTE: values outside this range reserved.
See section “4.2 Control variables ” for exact
parameter to be controlled.