7-3
Section
Explicit Messages
99
7-3
Explicit Messages
This section describes the explicit messages supported by the DeviceNet Inter-
face Unit.
When sending explicit messages from an OMRON Master Unit, use the CMND
or IOWR instruction to send the message data as an EXPLICIT MESSAGE
SEND (28 01) FINS command. Only the normal response is shown here; refer to
7-2-1 EXPLICIT MESSAGE SEND (FINS Command 28 01) for details on re-
sponses returned when errors occur.
When sending explicit messages from another company’s Master Unit, refer to
that Master Unit’s manuals for details on sending the message data shown here.
7-3-1 Supported Explicit Messages
The following table lists the explicit messages supported by the DeviceNet Inter-
face Unit.
Explicit Message
Function
Class ID
Service code
(see note)
Instance
ID
Page
PT Memory Read
(H
→
L)
Reads data from PT memory.
The read data is returned with the high byte
first and the low byte second in the words.
008A Hex
32 Hex (B2 Hex)
0001 Hex
99
PT Memory Read
(L
→
H)
Reads data from PT memory.
The read data is returned with the low byte
first and the high byte second in the words.
33 Hex (B3 Hex)
100
PT Memory Write
(H
→
L)
Writes data to PT memory.
Specify the write data with the high byte
first and the low byte second in the words.
34 Hex (B4 Hex)
101
PT Memory Write
(L
→
H)
Writes data to PT memory.
Specify the write data with the low byte first
and the high byte second in the words.
35 Hex (B5 Hex)
102
Note The response service code is shown in parentheses.
7-3-2 PT Memory Read (H
→
L)
Reads the specified number of bytes of PT memory data beginning at the speci-
fied word address. The read data is returned with the high byte first and the low
byte second in the words.
Command Block
01
28
Class ID
Command
code
32
Destination node address
Service code
8A
00
Instance ID
01
00
Address L
Number of bytes
Address H
Response Block
01
28
Source node address
Service
code
No. of bytes
received
Response
code
Command
code
00
00
B2
Data L
Data H
Read data
