Sending Explicit Messages; Overview; Procedure - Omron NE1A-SCPU01 - 07-2009 Operation Manual

Sending Explicit Messages

6-2 Sending Explicit Messages
6-2-1

Overview

Explicit Message Data Format
6-2-2

Procedure

112
An NE1A-series Controller can send explicit messages from a user program.
This function can be used only with DeviceNet.
User-registered messages are sent over the network when user-specified trig-
ger conditions are met. This can be used to notify monitoring and control
devices or as a method for specifying outputs to display devices.
When sending an explicit message, set the send conditions in the Logic Edi-
tor.
With an NE1A-series Controller, up to 32 bytes of explicit message data can
be sent, as shown below.
Parameter name
Destination node address
Service code
Class ID
Instance ID
Service data
For information on service codes, class IDs, instance IDs, and service data,
refer to the manual for the destination device of the message.
Set the conditions using the following procedure.
1. Trigger Address Setting
Set the condition for sending the explicit message. The explicit message
will be sent when the set address turns ON.
2. Send Condition Setting
Set the send conditions for the explicit message. The number of retries can
also be set.
3. Creating a Send Message
Check the object specifications at the destination node and create a send
message based on the explicit message format.
Data size
1 byte
1 byte
2 bytes
2 bytes
0 to 26 bytes
Section 6-2