Omron CJ1W-DRM21, CS1W-DRM21 Fins Command Explicit Message Send 28, Command Block Response Block

Sending Explicit Messages Section 6-4

The following diagram shows an example of actual node address specifica- tions.

Machine No. of DeviceNet Unit: 2

CMND

S

D

C

PC's

CPU

Unit

Node 05

Explicit message

Node 06

(Slave or Master not by OMRON)

The node address of the non-OMRON node is set as the destination node address in the FINS command data.

	15		8 7		0
S	2	8	0	1	Command code
S+1	0	6

Explicit command block

Node address of the non-

OMRON node: 06 Hex

	15	8 7		0
C+3	0	5	F	E
Destination node address:			Destination unit address:
Local node address: 05			FE or 12 ( Hex)

Note Depending on conditions, the destination slave may not always accept an explicit message. Always perform retry processing when sending explicit mes- sages.

FINS Command: EXPLICIT MESSAGE SEND (28 01)

Command Block

Response Block

EXPLICIT MESSAGE SEND will send an explicit DeviceNet message to the specified class and receive a response.

28	01			534 bytes max.
Command		Class ID	Instance ID	Service data
code		Service code
Destination node address

Normal Response

28 01 534 bytes max.

Command	Response	No. of bytes	Service data
code	code	received	Service code

Destination node address (remote node)

Error Responses

The following response is returned if an error occurs for the explicit message.

28 01

Command	Response No. of bytes		Error code
code	code	received	Service code 94 (Hex)

Destination node address (remote node)

The following response is returned if the explicit message cannot be sent or times out.

160