Omron CJ1W-DRM21 Operation Manual page 213

Word Data Write (Service Code: 1F Hex)
Word Data Write writes data to any I/O memory area in the memory used for CJ-series Unit in a CPU
Unit with a CJ-series DeviceNet Unit mounted. The write word data is in word units. The response block
is returned from low to high bytes.
Command Block
1F 2F
(*)
Class ID
Service Code
Note A body format of either 8 bits or 16 bits is possible.
Response Block
9F
Service Code
Parameters
Service Code (command, response): 1F Hex is specified for commands. For responses, the high-
est bit will turn ON and 9F Hex will be returned.
Class ID (command): Always 2F Hex.
Instance ID (command): The type of area in the memory used for CJ-series Unit to which the data
will be written is specified as shown in the following table.
Instance ID (Hex)
01
03
04
05
08 to 14
Address L, Address H (command): The address of the first word to which the data is written is
specified in hexadecimal as shown below.
Address L: The lower 2 digits when the first word address is displayed in 4-digit hexadecimal.
Address H: The higher 2 digits when the first word address is displayed in 4-digit hexadecimal.
Write Data (command): The specified area and write data is returned in order from word L (lower
byte: bits 0 to 7) to word H (higher byte: bits 8 to 15).
Important Points
The actual address L, address H, and number of write words that can be specified depends on the
mode of CPU Unit for the CJ-series DeviceNet Unit and the type of memory areas. Do not exceed
the boundary of the data areas for the CPU Unit you are using.
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
(*)
Address L Word data L
Instance ID Address H Word data H
Write data (200 bytes max.)
CPU Unit memory area
for write
CIO
DM
WR
HR
EM, banks 0 to C
6 Message Communications
Word data L
Word data H
Word range
CIO 0000 to CIO 6143
D00000 to D32767
W000 to W511
H000 to H511
En_00000 to En_32767
(n: 0 to C)
6
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