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XMP series product support master and slave mode of Modbus communication protocol.
Master format: When PLC is set to be master station, PLC sends request to other slave station
devices via Modbus instructions, other devices respond to the master station.
Slave format: When PLC is set to be slave station, it can only respond to other master devices.
The defaulted status of XMP is Modbus slave mode.
The internal soft unit’s numbers of XMP are corresponded with Modbus station address numbers,
please see the following table:
Coil space: ( Modbus address prefix is “ 0x ” )
Bit component address Modbus address
( decimal K )
Modbus address
( hex H )
M0~M7999 0~7999 0~1F3F
X0~X1037(octal) 16384~16927 4000~421F
Y0~Y1037(octal) 18432~18975 4800~4A1F
S0~S1023 20480~21503 5000~53FF
M8000~M8511 24576~25087 6000~61FF
T0~T618 25600~26218 6400~666A
C0~C634 27648~28282 6C00~6E7A
Register space: ( Modbus address prefix is “ 4x ” )
Word component
address
Modbus address
( decimal K )
Modbus address
( hex H )
D0~D7999 0~7999 0~1F3F
TD0~TD618 12288~12906 3000~326A
CD0~CD634 14336~14970 3800~3A7A
D8000~D8511 16384~16895 4000~41FF
FD0~FD5000 18432~23432 4800~5B88
FD8000~FD8511
26624~27135 6800~69FF
Free format communication transfer data in the format of data block, each block can transfer 128
bytes at most. Meanwhile each block can set a start symbol and a end symbol, or not set.
When communicating in free format mode, FD8220 should be 255.
Modbus communication
Communication address
Free format communication
Start Symbol (1 byte) Data Block (max bytes 128 ) End Symbol (1 byte)
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