Chapter 8 Operation Procedures and Fault Protection
129
8
7-4 Message Format
Address
(Drive)
OP Code Data n
…
Data 1 Data 0 CRC 0 CRC1
END
Drive
Address
No.
(1 Byte)
Operation
Message
(1 Byte)
Data Message
(Data length
―n‖: depending on
OP Code)
CRC
Checksum
No
Transmitting
≧
10ms
●Address:
Drive address number for host to control
00H:
The host broadcasts messages to all receivers (drives). All
receivers only receive the message but has no messages returned
to the host.
01H
~
FEH:
The host designates the receiver (drive) by defining the drive
address number.
●OP Code(Operation Code):
The operation of the host to the drive
03H-
Read multi-registers
06H-
Write to single register
08H-
Receiver detection
10H-
Write to multi-registers
●Data:
Including start register, several registers, data length (maximum 8 data), data
content (maximum 16 bits)
Note:
Data length
– 1 byte, others – 1 word(2 bytes)
●CRC Checksum:
Cyclical Redundancy Check performs XOR and bit shifting
operations for all hexadecimal values in the message to
generate the checksum code to verify the communication validity.
Checksum is to sum all message bits for 16-bit CRC calculations.
(See CRC Checksum)
●Message Length:
Message length is listed in between maximum and minimum
values. Message lengths of OP code 03H and 10H are
dependent on the number of registers required in one message.
(See Operation Code(OP Code) Description)
OP
Code
Description
Instruction Code
Return Code
Min(bytes) Max(bytes) Min(bytes) Max(bytes)
03H
Read multi-registers
8
8
7
21
06H Write to single register
8
8
8
8
08H
Drive Detection
8
8
8
8
10H Write to multi-registers
11
25
8
8
Summary of Contents for RM6F5 series
Page 1: ...AC MOTOR DRIVE Operation Manual RM6F5 series ...
Page 194: ...Notes 194 Notes ...
Page 195: ...Notes 195 Notes ...