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Explicit Message Communications
Section 4-7
4-7
Explicit Message Communications
4-7-1
Receiving Explicit Messages
Sending explicit messages from the Standard Master to the NE1A-series
Controller enables reading or writing any specified data or parameters of the
Controller. The Controller operates according to the command sent from the
master and returns a response.
The following example describes the I/O area read service provided by the
Controller. Refer to
Appendix 3 DeviceNet Explicit Messages
for details on the
services that are available.
NE1A-series Controller I/O Area Read
Reads the NE1A-series Controller’s local I/O or the Safety Slave I/O area allo-
cated to the Controller from the master.
Command Format
Response Format
• Normal Response to Explicit Message
• Error Response to Explicit Message
Destination Node Address (Command)
Specifies in 1-byte hexadecimal the NE1A-series Controller’s address of
the data to be read.
Service Code (Command/Response)
For commands, 4B hex is specified. For responses, the upper bit is turned
ON, and CB hex is returned.
4B
03
06
Destination node address
Class ID
Instance ID
Data
Service code
Offset
address
Data size
CB
Number of receive bytes
Read data
Originating node address
Service code
04
94
00
Number of receive bytes
Error code
Originating node Address
Service code
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...