Werbung
Table of supported D30Xy modbus functions
Function code
01
02
03
04
05
06
07
08 00
08 01
Function code
08 02
08 04
08 10
08 11
08 12
08 13
08 14
08 15
08 16
08 17
08 18
08 20
A
11
15
Description
Read n bits
Read n registers
Write 1 bit
Write 1 register
Read fast status byte
Echo diagnostic
Restart communication
(vvvv = 0xFF00 to clear the
event counter of function 11,
0x0000 to keep it)
Description
Read diagnostic register
Listen only
Clears all diagnostic registers
Reads bus messages counter
Reads invalid bus messages
counter
Reads exceptions counter
Reads slave addressed
messages counter
Reads broadcast messages
counter
Reads NAK messages
counter
Reads Slave busy counter
Reads bus overrun counter
Clears overrun counter
Reads event counter
Write n bits
PDU request format
0x01 aaaa nnnn
0x02 aaaa nnnn
0x03 aaaa nnnn
0x04 aaaa nnnn
0x05 aaaa yy00
0x06 aaaa vvvv
0x07
0x08 0x00 llll
0x08 0x01 vvvv
PDU request format
0x08 0x02 0x0000
0x08 0x04 0x0000
0x08 0x0A 0x0000
0x08 0x0B 0x0000
0x08 0x0aC 0x0000
0x08 0x0D 0x0000
0x08 0x0E 0x0000
0x08 0x0F 0x00a00
0x08 0x10 0x0000
0x08 0x11 0x0000
0x08 0x12 0x0000
0x08 0x14 0x0000
0x0B
0x0F aaaa nnnn bb ll
60
PDU answer format
0x01 bb ll
0x02 bb ll
0x03 bb ll
0x04 bb ll
0x05 aaaa yy00
0x06 aaaa vvvv
0x07 ff
Any bit set in ff indicates a
new available probe position
Bit 0 : New data for chanel 1
Bit 1 : New data for chanel 2
Bit 2 : New data for chanel 3
Bit 3 : New data for chanel 4
0x08 0x00 llll
0x08 0x01 vvvv
PDU answer format
0x08 0x02 vvvv
Bits of vvvv :
Bit 0 : Rs485 hardware error
Bit 1 : Rs485 software error
Bit 2 : Module flash error
Bit 3 : Slave configuration
error
(No response)
0x08 0x0A 0x0000
0x08 0x0B nnnn
0x08 0x0C nnnn
0x08 0x0D nnnn
0x08 0x0E nnnn
0x08 0x0F nnnn
0x08 0x10 nnnn
0x08 0x11 nnnn
0x08 0x12 nnnn
0x08 0x14 0x0000
0x0B nnnn
0x0F aaaa nnnn
Werbung
Kapitel
