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8.3.2. Read Holding Registers (Function Code 03H)
This command packet requests that the SPM33 responds all valid registers.
The value of reserved registers is 0.
Request Packet
(Master
→
SPM33)
Response Packet
(SPM33
→
Master)
Unit ID/ Slave
address
1 byte
Unit ID/ Slave address
1 byte
03 H (Function
Code)
1 byte
03 H (Function Code)
1 byte
Start register
address
2 bytes
Byte num.
(2 * register num.)
1 byte
Registers num.
2 bytes
First register data
2 bytes
CRC check code
2 bytes
Second register data
2 bytes
...
...
CRC check code
2 bytes
35
Содержание SPM33
Страница 1: ...V2 0...
Страница 76: ...three phase three wire system 3CT three phase three wire system 2CT 71...