34
9.13 Assembly 100 structure
The assembly 100 (output, consumer) is used to transfer the output data for the channels IO-1…IO-4 to
the evaluation unit . The data length of each channel is fixed to 20 bytes (10 words) . Inactive channels or
unused data fields should be filled with the default value 0x00 by the PLC .
Assembly
Byte
Content
Dataflow
Access
100d
00…19
IO-1 data request
O->T
Read/Write
20…39
IO-2 data request
O->T
Read/Write
40…59
IO-3 data request
O->T
Read/Write
60…79
IO-4 data request
O->T
Read/Write
Table 7: Assembly 100 (output image of the PLC)
A class 1, exclusive owner (EO) connection is used to access the assembly 100 .
9.14 Assembly 101 structure
The assembly 101 (input, producer) is used to transfer the response data from the channels IO-1…IO-4
to the PLC . The data length of each channel is fixed to 20 bytes (10 words) . Inactive channels or unused
data fields are to be filled with the default value 0x00 .
Assembly
Byte
Content
Dataflow
Access
101d
00…19
IO-1 data response
T->O
Read only
20…39
IO-2 data response
T->O
Read only
40…59
IO-3 data response
T->O
Read only
60…79
IO-4 data response
T->O
Read only
Table 8: Assembly 101 (PLC input)
- Access via class 1 exclusive owner (EO) .
- Access via class 1 listen only (LO) .
- The listen only heartbeat connection point is supported on the assembly 192 .
Channel specific data with a length of 20 bytes per channel is accessed via the implicit messaging
(IO messaging) of EtherNet/IP .
