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Function code 05 used to write single bit-type registers
•
Function code 15 used to write multiple bit-type registers
the content of the bit-type register could be switches alarm information etc.
Read and write operations of the registers in word
•
Function code 03、04 are used to read multiple word-type registers
•
Function code 06 is used to write single word-type registers.
•
Function code 16 is used to multiple word-type registers。
The content of the word-type registers can be voltage, current, generated energy, etc.
Description of the registers
Description of the registers in bit
Bit address
Functional description
remark
Input switches and alarm signal(only Available to function code 02 )
0x0000
Digital input 1 status, DI1
The input switch DI1 of the device（0：break，1：
close）
0x0001
Digital input 2 status, DI2
The input switch DI2 of the device（0：break，1：
close）
0x0011
External temperature high alarm
When the external temperature is higher than the set
value, set to 1
0x0020
Voltage too high alarm
When the detected voltage is bigger than the set
value, set to 1
0x0021
Voltage too low alarm
When the detected voltage is smaller than the set
value, set to 1
0x0030
Channel 1 no current alarm
When current value equal to 0, set 1
0x0031
Channel 1 current too low alarm
When current value smaller than the set value but not
equal to 0, set 1
0x0032
Channel 1current too high alarm
When current value bigger than the set value, set 1
0x0033
Channel 2 no current alarm
When current value equal to 0, set 1
0x0034
Channel 2 current too low alarm
When current value smaller than the set value but not
equal to 0, set 1
