Omron CJ Series User Manual

6-9
6 Message Communications
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
6-3 Acyclic Messages
6
6-3-2 PROFIBUS MESSAGE SEND (2809)
For commands, specifies the data defined by the service code.
For responses, returns the reception data defined by the service code.
No. of Bytes Received (Response)
Returns the number of data bytes received in the rest of the message.
Source Station Address (local node) (Response)
Returns the Station Address of the responder.
Error Code (Response)
Returns the error code defined by the slave device.
The PROFIBUS MESSAGE SEND command provides a means to initiate transmission and reception
of standard PROFIBUS DP and DP-V1 Class 1 services over the PROFIBUS network via the CJ1W-
PRM21 PROFIBUS Master Unit. The general command/response structures are shown below.
 Command Format
 Response Format
 Parameters
The PROFIBUS service data part in both the command and response depends on the PROFIBUS
service to be transmitted / received, and will therefore be different in length and contents for every
service. Also, the response error codes will depend on the services requested. The common param-
eters are described below. Each supported service will be described separately after the common
parameters.
Destination Address (Command)
The address of the device on the PROFIBUS network, to which the PROFIBUS message will be
sent. The valid address range is 0 to 7E (Hex).
Device Service Access Point (Command)
The Device Service Access Point is a 1 byte number, identifying the PROFIBUS service to the slave
device, as defined by the PROFIBUS standard.
6-3-2 PROFIBUS MESSAGE SEND (2809)
Device
address
Command
code
28 09
Device Service
Access Point
PROFIBUS command
specific data
PROFIBUS service data
Response
code
Command
code
28 09
PROFIBUS service data

Omron CJ Series Specifications

General

Brand	Omron
Model	CJ Series
Category	Controller
Language	English