Ziegler mfm 3480, Руководство пользователя

Страница: 46 / 78

Response:
Device Address
Function Code
Byte Count
Data Register1 High Byte
01 (Hex)
03 (Hex)
04 (Hex)
3F (Hex)
Data Register1Low Byte 80 (Hex)
44
Data Register2 High Byte 00 (Hex)
00(Hex) Data Register2 Low Byte
F7 (Hex)
CRC Low
CRC High CF (Hex)
Byte Count : Total number of data bytes received.
Data register 1 High Byte : Most significant 8 bits of Data register 1 of the parameter requested.
Data register 1 Low Byte : Least significant 8 bits of Data register 1 of the parameter requested.
Data register 2 High Byte : Most significant 8 bits of Data register 2 of the parameter requested.
(Note : Two consecutive 16 bit register represent one parameter.
)
Data register 2 Low Byte : Least significant 8 bits of Data register 2 of the parameter requested.
Example : Writing CT Secondary to 1 A
System type : Start address= 2A (Hex) Number of registers = 02
Query:
01 (Hex)
10 (Hex)
Device Address
Function Code