
© Brüel & Kjær Vibro
● C106834.002 / V06 ●
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Brüel & Kjær Vibro
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Instruction VC-1800 Series
Connecting the VIBROCONTROL 18xx to a
PLC/PC
EN
UNRESTRICTED DOCUMENT
9.4.2
Modbus Addresses and Registers
The Modbus TCP address and registers for VIBROCONTROL 18xx are listed below. A register
consists of 2 bytes. An address can also be split up, for example "1000,5". This means that the
register will not start at the first byte, but at the second. The "second" byte is the LSB in a Big
Endian Word.
Proper conversion will also make it the LSB in Little Endian, thereby converting it to the "first" byte
instead.
Flash data (Read only)
Status
Modbus
address
Register
length
Register
type
Register name
General critical registers, must be read:
40000
0.5
U8
status_code [OK: Monitoring_state=6]
Error_state = 3
Settling_state = 4
Self_test_state=5
Monitoring_state=6
29738
2
s32
ccw_flash [OK: 0x20300]
CCW = 0x2030
40006
0.5
u8
system_failure_relay [OK: state = 0]
No Alarm = 0 Alarm
= 1
40019.5
0.5
u8
transducer_input_1.overload [OK: Overload_state=0]
Overload_state = 0
Overload_state = 1
40046.5
0.5
u8
transducer_input_2.overload [OK: Overload_state=0]
Overload_state = 0
Overload_state = 1
40073.5
0.5
u8
transducer_input_3.overload [OK: Overload_state=0]
Overload_state = 0
Overload_state = 1
40100.5
0.5
u8
transducer_input_4.overload [OK: Overload_state=0]
Overload_state = 0
Overload_state = 1
Optional registers to be read:
Transducer 1:
40021
2
float
transducer_input_1.band_1.vibration_detector.measuring_result
40023
0.5
u8
transducer_input_1.band_1.vibration_detector.alert_alarm
No Alarm = 0 Alarm
= 1
40023.5
0.5
u8
transducer_input_1.band_1.vibration_detector.danger_alarm
No Alarm = 0 Alarm
= 1
40024
2
float
transducer_input_1.band_2.vibration_detector.measuring_result
40026
0.5
u8
transducer_input_1.band_2.vibration_detector.alert_alarm
No Alarm = 0 Alarm
= 1
40026.5
0.5
u8
transducer_input_1.band_2.vibration_detector.danger_alarm
No Alarm = 0 Alarm
= 1
40027
2
float
transducer_input_1.band_2.envelope_detector_1.measuring_re
sult