Publication 1752-UM001A-EN-P - October 2006
208 Explicit Messages
For commands, specify 4B (hex) for the Service Code.
Class ID is always 0356 for a SmartGuard controller.
The Instance ID is dependent upon the type of message.
The command data includes the offset size, and data size. The offset
size specifies the address from which to start reading. This is an offset
in bytes from the first line of the area. The data size specifies the
number of bytes to be read from 1…256. The range values shown
below should be used as a guide for setting the offset and size for the
various data areas.
Response Format
The Number of Receive Bytes for responses indicates the number of
bytes of receive data from the originating node address to the end of
the returned response (in hexidecimal format).
The Originating Node for responses returns the node address of the
responding SmartGuard controller in 1 byte hexidecimal.
For responses, the upper bit is turned on and CB hex is returned for
the Service Code.
The Read Data for responses is the I/O data returned from the
specified area. The address offsets and bit assignments for reading the
Instance ID Values
Explicit Message Type Service Instance ID
Read Local Input Area Read 0001 (hex)
Read Local Output Area Read 0002 (hex)
Read Safety Remote Input Area Read 0005 (hex)
Read Safety Remote Output Area Read 0006 (hex)
Range Values
Area Range
Local Input Area 0 or 1
Local Output/Test Output Area 0 or 1
Safety Remote Input Area 0…551
Safety Remote Output Area 0…551
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