11
(3) Message format for Write Multiple Registers (Function code: 0x10)
●
Writes contents in the Holding Register to reflect it in the IJ Printer.
●
The maximum number of bytes that can be written in the Holding Register per time is 246
bytes; if this number is exceeded, you must divide the data into smaller segments while
updating the starting address each time.
●
When the writing operation onto Holding Registers is made more than once, 0x0001 (Start)
shall be written first on the control flag which is placed in the first address 0x0000 of Holding
Registers. Then conduct writing more than once and finally write 0x0002 (Stop) onto the
control flag. When 0x0002 (Stop) is written on the control flag, the data being written on
Holding Registers will be reflected to IJ printer.
Request message configuration
No. Name Size
Range
Description
1 Device address
1 byte
0x01 to 0x03
Sets device address.
2 Function code
1 byte
0x10
Sets function code (Write Multiple
Registers).
3 Start address
2 bytes
0x0000 to
0xFFFF
Sets writing start address. Address is
set in word units.
4
No. of words to be
written
2 bytes
1 to 123
Sets number of words to be written.
5
No. of bytes to be
written
1 byte
1 to 246
Sets number of bytes to be written.
6 Data to be written
2 to 246
bytes
0x0000 to
0xFFFF
Sets data to be written (variable
length of 2 to 246 bytes). 0x00 is
added to the end when data of
uneven byte length is set.
Response message data configuration (normal)
No. Name Size
Range
Description
1 Device address
1 byte
0x01 to 0x03
Sets device address received as it is.
2 Function code
1 byte
0x10
Sets function code received as it is.
3 Start address
2 bytes
0x0000 to
0xFFFF
Sets start address received as it is.
4
No. of words to be
written
2 bytes
1 to 123
Sets No. of words to be written
received as it is.
Response message data configuration (abnormal)
No. Name Size
Range
Description
1 Device address
1 byte
0x01 to 0x03
Sets device address received as it is.
2 Function code
1 byte
0x90
Adds 0x80 to function code received.
3 Error code
1 byte
0x01 to 0x03
Sets error code. Error code differs
according to cause.
