Compressed Air Alliance POM200, User Manual

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Power Meter – POM200 User Manual v1
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Configure Meter
You can configure the power meter by writing command and command parameters
to corresponding command registers using Modbus function 16.
Command request
T
he following table describes a Modbus command request:
Slave
Address
(8 bits)
Function
Code
(8 bits)
Command
Register
Address
(16 bits)
Command
Register
Number
(16 bits)
Data
Length
(8 bits)
Command Register
Value
(16 bits) X N
CRC
(
1
6 bits)
1-247 16
High
8 bits
Low
8
bits
High
8
bits
Low
8
bits
N×2 Command Parameter
Low
8
bits
High
8
bits
Command Result
The command result can be obtained by reading registers 424 and 425.
The following table describes the command result:
Register
Address
Content Size
(Int16)
Data (example)
424 Requested Command
Number
1 1001(set Date Time)
425 Result 1 0 = Valid Operation
80 = Invalid Command
81 = Invalid Parameter
82 = Invalid Number of
Parameters
83 = Operation Not Performed