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CENTRIC User Guide, 3.4
41
Table 4: Holding Registers for Modbus queries
(Note: these registers can be addressed as either holding registers [for example, 4x0002] or input registers [for example, 3x0002])
Register
Variable name
GET Values
Remarks
1
4x0001 Battery Condition
0: Good
1: Weak
2: Replace
2
4x0002 Battery Status
0: Battery OK
1: Battery Low
2: Battery Depleted
Has effect only during power failure (battery discharge), "Battery low" usually comes
minutes before the UPS batteries are depleted and it switches off
3
4x0003 Battery Charge
0: Floating
1: Charging
2: Resting
3: Discharging
Most common situation is "floating" as a constant state, however this depends on the
UPS topology
4
4x0004 Seconds On Battery
seconds
Has effect only during power failure
5
4x0005 Estimated Minutes
minutes
Mathematical estimation of available backup time
6
4x0006 Estimated Charge
0-100%
Mathematical estimation of battery charge in percents
7
4x0007 Battery Voltage
×10 Vdc
Divide the value by 10 for real measurement: 485/10=48.5 Vdc
8
4x0008 Battery Current
×10 A
Divide the value by 10 for real measurement: 21/10=2.1 A
9
4x0009 Battery Temperature
°C
Degrees centigrade
11
4x0011 Input Lines Number
1 to 3
Number of the UPS input phases
12
4x0012 Input Frequency Line 1
×10 Hz
Divide the value by 10 for real measurement: 502/10=50.2 Hz
13
4x0013 Input Voltage Line 1
×10 Vac
Divide the value by 10 for real measurement: 2315/10=231.5 Vac
14
4x0014 Input Current Line 1
×10 A
Divide the value by 10 for real measurement: 21/10=2.1 A
16
4x0016 Input Frequency Line 2
×10 Hz
Divide the value by 10 for real measurement: 502/10=50.2 Hz
17
4x0017 Input Voltage Line 2
×10 Vac
Divide the value by 10 for real measurement: 2315/10=231.5 Vac
18
4x0018 Input Current Line 2
×10 A
Divide the value by 10 for real measurement: 21/10=2.1 A
20
4x0020 Input Frequency Line 3
×10 Hz
Divide the value by 10 for real measurement: 502/10=50.2 Hz
21
4x0021 Input Voltage Line 3
×10 Vac
Divide the value by 10 for real measurement: 2315/10=231.5 Vac
22
4x0022 Input Current Line 3
×10 A
Divide the value by 10 for real measurement: 21/10=2.1 A