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DeviceNet (MCW151-DRT-E only)
Section 4-2
Response Block
Parameters
Service code (command, response)
In the command, 36 Hex is specified. In the response, the leftmost bit is
turned ON and B6 Hex is returned.
Address H, Address L (command)
The address in hexadecimal of the first word of data to be read.
Address H: Leftmost 2 digits of the address in 4-digit hexadecimal (ignored
for MC Unit).
Address L: Rightmost 2 digits of the address in 4-digit hexadecimal.
For the VR memory, the maximum value is 250 (FA Hex).
Length H, Length L (command)
The number of VR memory elements to read.
Length H: Leftmost 2 digits of the length in 4-digit hexadecimal (ignored for
MC Unit).
Length L: Rightmost 2 digits of the length in 4-digit hexadecimal.
When an OMRON Master is being used, the maximum is 39 elements (27
Hex). The 39 VR elements imply 234 bytes to be transferred.
Write data (command)
The specified data should be written from word H (leftmost byte: bits 08 to 15)
to word L (rightmost byte: bits 00 to 07).
Note The user should be aware that the MC Unit does not check if the PC memory
data complies to the three-word format.
VR DATA WRITE (ONE-
WORD FORMAT)
VR DATA WRITE (ONE-WORD FORMAT) will write VR data. The VR data
will be defined according to the one-word format.
Command Block
28
01
00
00
00
02
B6
Source node address
Command
code
Response
code
No. of bytes
received
Service code
28
01
37
00
8A
00
01
..
Destination node address
Service code
Instance ID
Length H
Length L
Word data H
Word data L
Command
code
Class ID
Address H
Address L
Write data
(Max. 238 bytes)