Acrel ARTU, Инструкция по установке и эксплуатации

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16
XX XX(05H) XXXX 0ff00H
或
0000H XXXX( CRC check value)
Lower device reply(MODBUS 05 functions)
ADD Function ADD Data CRC check
BYTE BYTE WORD WORD WORD
XX XX(05H) XXXX(same as
the
upper
computer
request)
XXXX(same as
the
upper
computer
request)
XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 08 functions)
ADD corresponding
error function Exception error code data CRC check
BYTE BYTE BYTE WORD
XX XX(85H) XX(Wrong address for 02H, wrong
data for 03H) XXXX( CRC check value)
5.4.5
Use the 06H function of Modbus to write single data
Upper computer requires to write a single data (MODBUS's 06H function)
ADD Function Start address Data CRC check
BYTE BYTE WORD WORD WORD
XX XX(06H) XXXX XXXX XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 06H function)
ADD Function Start address Data CRC check
BYTE BYTE WORD WORD WORD
XX XX(06H) XXXX XXXX XXXX( CRC check value)
Abnormal Lower device reply(MODBUS 86H function)
ADD corresponding
error function Exception error code data CRC check
BYTE BYTE BYTE WORD
XX XX(86H) XX (02H address wrong, 03H data wrong,
04 not allowed to write) XXXX( CRC check
value)
5.4.6
Use Modbus's 10H function to write multiple data
Host computer requires to write multiple data (MODBUS's 16 (10H) function)
ADD Function Start
address Data
number Data length Data CRC check
BYTE BYTE WORD WORD BYTE 2*N BYTE WORD
XX XX (10H) XXXX XXXX(n) XX(2*n) XXXX……
. XXXX( CRC check
value)
Lower device reply(MODBUS's 16 (10H) functions)
ADD Function Start address Data number CRC check
BYTE BYTE WORD WORD WORD