13
Block
Modbus
Address
HEX Coil
Address
Modbus
Coil
Address
Register Data
Coil Data
Read/
Write
Func-
tion
Codes
Description
Discrete
Coils
1
0x00
1
I/O States
Low level in
R
1,3
0=Off;1=On
0x01
2
Stop in
0x02
3
Start in
0x03
4
High level in
0x04
5
Pump 1 fault in
0x05
6
Pump 2 fault in
0x06
7
Pump 1 out
0x07
8
Pump 2 out
0x08-0x0f
9-16
Unused
2
0x10
17
Alarm states
High level fault
R
1,3
0=Off;1=On
0x10
18
Low level fault
0x10
19
Pump 1 fault
0x10
20
Pump 2 fault
0x10
21
Low pressure fault
0x10
22
Pump 1 prime loss
0x10
23
Pump 2 prime loss
0x10
24
Inhibit fault
0x18-0x1f
25-32
Unused
3
0x20
33
System states
Single pump mode
enabled
R
1,3
0=Off;1=On
0x21
34
Current loop mode
state
0x22
35
Mute state
0x23
36
Alarm test active
0x24
37
Inhibit fault enable
0x25
38
Pump inhibited
0x26
39
Current loop invert
0x27-0x2f
40-48
Unused
Coils
4
0x30
49
System states
Set mute flag
(write only)
W
5
0=Off;1=On
5
0x40
65
Reset alarms
(write only)
0=Off;1=On
MODBUS COILS
