86
Explicit Message Communications
Section 4-7
Error Code (Response)
The following error codes defined in DeviceNet may be returned.
4-7-2
Sending Explicit Messages
An NE1A-series Controller can send explicit messages from a user program.
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.
■
Explicit Message Data Forma
For information on service codes, class IDs, instance IDs, and service data,
refer to the manual for the destination device of the message.
Procedure
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.
Restrictions
• One address can be set in the user program for the trigger address.
• The NE1A-series Controllerís internal I/O memory is sent as a response
to an explicit message. Explicit messages can be sent from a user pro-
gram in the Controller, but internal information in the Controller cannot be
used as send message data.
Response
code
Error name
Cause
08FF
Service not
supported
Error in the service code.
13FF
Not enough data
The data is shorter than the specified size.
15FF
Too much data
The data is longer than the specified size.
16FF
Object does not
exist
The specified class ID or instance ID is not supported.
20FF
Invalid parameter The specified operation command data is not supported.
Parameter name
Data size
MACID
1 byte
Service code
1 byte
Class ID
2 bytes
Instance ID
2 bytes
Service data
0 to 26 bytes
Summary of Contents for NE1A-SCPU01 - 07-2009
Page 3: ...iv...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 15: ...xvi...
Page 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Page 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Page 85: ...50 Wiring Section 3 2...
Page 123: ...88 Explicit Message Communications Section 4 7...
Page 141: ...106 Safety Outputs Section 5 4...
Page 257: ...222 Connection Status Tables Section 10 8...
Page 261: ...226 NE1A series Controller Replacement Section 11 2...
Page 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 267: ...232 Appendix A Local Output Setting Example...
Page 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 270: ...235 Appendix A Local Output Setting Example...
Page 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 276: ...241 Appendix A Local Output Setting Example...
Page 289: ...254...
Page 293: ...258 Index...