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Appendix
Appendix 1: DeviceNet Explicit Messages
DeviceNet explicit messages sent from the Master Unit to the DST1-series Terminals can be used to read or
write any parameter of a specified Terminal. The DST1-series Terminal processes a command sent from the
Master Unit and then returns a response.
A-1-1
Basic Format of Explicit Messages
The basic format of each command and response is shown below.
Command Block
Destination Node Address
The node address of the Unit that is sending the explicit message is specified with on hexadecimal byte.
Service Code, Class ID, Instance ID, and Attribute ID
The parameters used for specifying the command, processing object, and processing content.
Note
The number of bytes designated for the class ID, instance ID, and attribute ID depend on the Master
Unit. When sent from an OMRON DeviceNet Master, the class ID and instance ID are 2 bytes (4 digits)
each, and the attribute ID is 1 byte (2 digits).
Data
Data is not required when a read command is used.
Response Block
Normal Response Block
Error Response Block
Number of Bytes Received
The number of bytes received from the source node address is returned in hexadecimal. When an error
response is returned for an explicit message, the number of bytes is always 0004 hex.
Source Node Address
The node address of the node from which the command was sent is returned in hexadecimal.
Destination node
address
Service
code
Class
ID
Instance
ID
Attribute
ID
Data
Number of bytes received
Source node
address
Service code
Data
Number of bytes received
0004 hex (fixed)
Source node
address
Service code Error code
Summary of Contents for DST1-ID12SL-1
Page 1: ...OPERATION MANUAL Cat No Z904 E1 06 DeviceNet Safety DST1 series Safety I O Terminals...
Page 2: ......
Page 3: ...DST1 series Safety I O Terminals Operation Manual Revised June 2011...
Page 4: ...iv...
Page 10: ...x...
Page 14: ...xiv...
Page 110: ...86 Remote I O Allocations Section 3 2...
Page 116: ...92 Indicators Section 4 2...
Page 134: ...110 DST1 XD0808SL 1 Section 5 4...
Page 146: ...122 Maintenance Section 7 4...
Page 159: ...135 Logic Terminal Wiring Examples Section 8 3...
Page 160: ...136 Logic Terminal Wiring Examples Section 8 3...
Page 178: ...154 Index...
Page 181: ...157 Revision History...