D1-N Series Servo Drive User Manual Modbus Communication
14-6 HIWIN MIKROSYSTEM Corp.
Table14.2.9
Exception Code Definition Description
01h Illegal function The function code is not supported.
02h Illegal data address Try to read an illegal register.
03h Illegal data value The number of registers is over 123.
04h Servo device failure
The request contains incomplete data.
For instance, the controller only
requests 16 bits of a 32-bit parameter.
Table 14.2.10 is the example of writing two registers. The starting address is 0x0001. The values are
00 0Ah and 01 02h.
Table14.2.10
Command Response Error
Starting
address
Starting
address
CRC
Register
number
Register
number
CRC
Register
0x0001
Register
0x0002
CRC
14.3 Modbus object
The data types of Modbus objects are listed in table 14.3.1.
Table14.3.1
Code Data Type Data Range
INT16 Signed 16 bit -32,768~+32,767
INT32 Signed 32 bit -2,147,483,648~+2,147,483,647
UINT16 Unsigned 16 bit 0~65,535
UINT32 Unsigned 32 bit 0~4,294,967,295
REAL32 Float 32 bit -
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