Compressed Air Alliance POM200, User Manual

Page: 47 / 68

Power Meter – POM200 User Manual v1
www.compressedairalliance.com 47
Exception response
Exception response frame format
No. Alias Type Range
(decimal)
Range
(hexadecimal)
Description
1 Salve ID UInt8 1-247 0x01-0xF7
2 Function code UInt8 (128+3)
(128+16)
(0x80+0x03)
(0x80+0x10)
3 Exception code UInt8
4 CRC-16 Check UInt16 Little-Endian
Exception code of MODBUS
Code
(hexadecimal)
Name Meaning
0x01 ILLEGAL FUNCTION The function code received in the query is not
an allowable action for the meter
0x02 ILLEGAL DATA
ADDRESS
The data address received in the query is not
an allowable address for the meter
0x03 ILLEGAL DATA VALUE A value contained in the query data field is not
an allowable value for the meter
0x04 DEVICE FAILURE An unrecoverable error occurred while the
server was attempting to perform the
requested action.