Response
40
hex
Value of first register (least significant word)
40
hex
00
hex
Value of second register (most significant word)
00
hex
0E
hex
Modbus RTU checksum
E8
hex
(silence for >3.5 bytes)
End of Modbus RTU frame
Communication Description
Register address
23 (1-based Modbus documentation format) =
0016
hex
(0-based format used in actual
communication).
Data format
Two 16-bit Modbus registers interpreted as IEEE
754 binary32 floating point value, least
significant word first.
Returned value
40400000
hex
, which is binary32 representation
of 3 (ppm).
Appendix A – Modbus Reference
69
Summary of Contents for Optimus OPT100
Page 1: ...M211858EN E User Guide Vaisala Optimus DGA Monitor for Transformers OPT100...
Page 24: ...Figure 11 Measurement Graph for 1 Day Rate of Change Values OPT100 User Guide M211858EN E 22...
Page 72: ...OPT100 User Guide M211858EN E 70...
Page 76: ...OPT100 User Guide M211858EN E 74...
Page 77: ......
Page 78: ...www vaisala com...
