Mitsubishi Electric MELSEC iQ-R Series User Manual page 33

Buffer memory area assignment
This section describes 'Command interface (CIF)' (Un\G1000 to Un\G1066) assignment for SDO read.
The following table shows the transmit message assignment.
Address Description
Transmit message
Un\G1000 Command code
• 0004H: SDO read
Un\G1001 Set the node ID.
• 0000H: Access the own node.
• 0001H to 007FH: Access the specified node.
Un\G1002 Set the index.
• 0000H to FFFFH: Configurable indexes of the object dictionary ( Page 186 Object Dictionary)
Un\G1003 Upper byte: Reserved
Lower byte: Set the subindex.
• 00H to FFH: Configurable subindexes of the object dictionary ( Page 186 Object Dictionary)
Un\G1004 to Un\G1066 System area
The following table shows memory assignment for a receive message.
Address Description
Receive message
Completed successfully
Un\G1000 Command execution result code
• 0005H: SDO read succeeded
Un\G1001 Node ID (value set by the transmit message)
Un\G1002 Index (value set by the transmit message)
Un\G1003 Sub-index (value set by the transmit message)
Un\G1004 The data length (bytes) is stored.
• 1 to 124
Un\G1005 to Un\G1066 Result data is stored.
• Un\G1005: The lower byte in first, the upper byte in second

• Un\G1066: The lower byte in 123rd, the upper byte in 124th
Completed with an error
Command execution result code
• 000FH: Error
Page 162 Command interface (CIF) (Un\G1000 to
Un\G1066)
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1 FUNCTIONS
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1.3 SDO