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A Appendix

A - 10

GX-series EtherCAT Slave Unit User’s Manual

Indexes 1600 hex to 17FF hex are used for Receive PDO mapping, and indexes 1A00 hex to 1BFF hex

are used for Transmit PDO mapping. Sub-indexes after sub-index 1 provide information about the

application object being mapped.

The following indexes describes the specific objects by Slave Unit types.

• This object gives the mapping for an application that uses digital output functions.

A-1-5 PDO Mapping Object

31 16 15 8 7 0

Indexes

Sub

Indexes

Bit length

MSB LSB

Bits 0 to 7 : Bit length of the mapped object.

(For example, for 32 bits, 20 hex is given.)

Bits 8 to 15 : Sub-index of the mapped object.

Bits 16 to 31 : Index of the mapped object.

Digital I/O Slave Unit

1700 hex 257th receive PDO Mapping

Sub-index 0: Number of objects

Range: − Unit: − Default: Differ by Slave Unit types* Attribute: −

Size: 1 byte (U8) Access: RO PDO map: Not possible

Sub-index 1: 1st Output Object to be mapped

Range: − Unit: − Default: Differ by Slave Unit types* Attribute: −

Size: 4 bytes (U32) Access: RO PDO map: Not possible

1701 hex 258th receive PDO Mapping

Sub-index 0: Number of objects

Range: − Unit: − Default: Differ by Slave Unit types* Attribute: −

Size: 1 byte (U8) Access: RO PDO map: Not possible

Sub-index 1: 1st Output Object to be mapped

Range: − Unit: − Default: 32200101 hex Attribute: −