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communications setuP
This table lists the addresses assigned to each data point. Registers are read Most Significant Byte (MSB) first. 32-bit floating point values are encoded per IEEE Standard 754.
For floating point format variables, each data point appears twice because two 16-bit addresses are required to hold a 32-bit float value. The 16 bit Most Significant Word
(MSW) is in the lower address of the register pair, while the least Significant Word (LSW) is in the upper address.
Modbus RTU function codes supported: 3=read holding registers; 6=preset single register; 17=report Slave I.D.
Integer Registers
Modbus Addr
Typical Offset
40001
0
40002
1
40003
2
40004
3
40005
4
40006
5
40007
6
40009
8
40010
9
40013
12
40016
15
40022
21
40025
24
40026
25
40027
26
Float Registers
Modbus Addr
Typical Offset
40257
---
40258
---
40259
0
40260
0
40261
2
40262
2
40265
6
40266
6
40275
16
40276
16
40281
22
40282
40287
28
40288
40299
40
40300
40305
46
40306
46
40307
48
40308
48
40309
50
40310
50
Modbus addresses in the 4xxxx format follow the Modicon protocol specification for point addressing. The actual address sent is the value shown, minus 40001. In other words,
the leading "4" is omitted, and the remaining 4-digit number is decremented so that point 40001 is requested with a value of zero in the actual Modbus communication. Some
Modbus implementations require point addresses to be specified beginning at 0 or 40000, instead of 40001. Programming code may also require addresses that correspond to
actual values transmitted, so a value of zero is used to request data beginning at Modbus address 40001.
In many applications, a single Modbus command is used to read all of the data available from the meter. For integers, the beginning address is 40001 (or zero in the actual
Modbus command), and for floats the first address used would typically be 40259 (or 258 in the actual Modbus command). Although the first float appears at address 40257,
it is not necessary to read this value because it is a duplicate copy of the kWh value (required by the product firmware). When a block of data is read, the "typical offset" values
index to the data within the block.
Z205220-0C
PAGE 5
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Veris, and the Veris 'V' logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
H8030/8031
Units
Description
KWH
Energy Consumption, LSW
KWH
Energy Consumption, MSW
KW
Demand (power)
VAR
Reactive Power
VA
Apparent Power
---
Power Factor
VOLTS
Voltage, line to line
AMPS
Current
KW
Demand (power), phase A
---
Power Factor, phase A
VOLTS
Voltage, phase A-B
AMPS
Current, phase A
KW
Average Demand
KW
Minimum Demand
KW
Maximum Demand
Units
Description
KWH
Energy Consumption
KWH
Energy Consumption
KWH
Energy Consumption (same 40257)
KWH
Energy Consumption (same 40258)
KW
Demand (power)
KW
Demand (power)
VA
Apparent Power
VA
Apparent Power
KW
Demand (power), phase A
KW
Demand (power), phase A
---
Power Factor, phase A
---
Power Factor, phase A
VOLTS
Voltage, phase A-B
VOLTS
Voltage, phase A-B
AMPS
Current, phase A
AMPS
Current, phase A
KW
Average Demand
KW
Average Demand
KW
Minimum Demand
KW
Minimum Demand
KW
Maximum Demand
KW
Maximum Demand
©2009 Veris Industries USA 800.354.8556 or 503.598.4564 / support@veris.com
INSTALLATION GUIDE
FLOAT: UPPER
FLOAT: LOWER
16 bits
16 bits
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
03095
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