CET PMC-340 User Manual

CET Inc.
31
Chapter 5 Modbus Register Map
This chapter provides a complete description of the Modbus register map (Protocol Version 1.0) for
the PMC-340 to facilitate the development of 3
rd
party communications driver for accessing
information on the PMC-340. For a complete Modbus Protocol Specification, please visit
http://www.modbus.org. The PMC-340 supports the following Modbus functions:
1) Read Holding Registers (Function Code 0x03)
2) Preset Multiple Registers (Function Code 0x10)
The following table provides a description of the different data formats used for the Modbus registers:
Format
Description
UINT16/INT16
Unsigned/Signed 16-bit Integer
UINT32/INT32
Unsigned/Signed 32-bit Integer
Float
IEEE 754 32-bit
Single Precision Floating Point Number
5.1 Basic Measurements
Register
Property
Description
Format
Scale
Unit
Model
A
B
0000
RO
Uan
Float
x1
V


0002
RO
Ubn
Float
V


0004
RO
Ucn
Float
V


0006
RO
Uln Average
Float
V


0008
RO
Uab
Float
V


0010
RO
Ubc
Float
V


0012
RO
Uca
Float
V


0014
RO
Ull Average
Float
V


0016
RO
Ia
Float
A


0018
RO
Ib
Float
A


0020
RO
Ic
Float
A


0022
RO
I Average
Float
A


0024
RO
kWa
Float
W


0026
RO
kWb
Float
W


0028
RO
kWc
Float
W


0030
RO
kW Total
Float
W


0032
RO
kvara
Float
var


0034
RO
kvarb
Float
var


0036
RO
kvarc
Float
var


0038
RO
kvar Total
Float
var


0040
RO
kVAa
Float
VA


0042
RO
kVAb
Float
VA


0044
RO
kVAc
Float
VA


0046
RO
kVA Total
Float
VA


0048
RO
PFa
Float


0050
RO
PFb
Float


0052
RO
PFc
Float


0054
RO
PF Total
Float


0056
RO
Frequency
Float
Hz


0058
RO
Uan/Uab (3P3W) Angle
Float
。


0060
RO
Ubn/Ubc (3P3W) Angle
Float
。


0062
RO
Ucn/Uca (3P3W) Angle
Float
。


0064
RO
Ia Angle
Float


0066
RO
Ib Angle
Float


0068
RO
Ic Angle
Float


0070
RO
In (Calculated)
Float
A


0072~0073
Reserved
0074
RO
Displacement PFa
Float
x1
-


0076
RO
Displacement PFb
Float


0078
RO
Displacement PFc
Float


0080~0093
Reserved

CET PMC-340 Specifications

General

Brand	CET
Model	PMC-340
Category	Measuring Instruments
Language	English