ETHERNET/IP™ Object Model
Ethernet Software Reference Guide
33
Assembly Object (04HEX - 4 Instances)
The following tables contain the attribute, instance, data mapping, and
common services information for the Assembly Object.
Table 6. Assembly Object (04
HEX -
2 Instances)
Instance
Attribute
ID
Name CIP Data Type Data Value
Access
Rule
Class
(Instance 0)
1 Rev
ision UINT 2 Get
2 Max instance UINT 129 Get
100 (0x64) 3 T2O (Input) Assembly (see
below)
SINT[472
] Varies Get
112 (0x70) 3 O2T (Output) Assembly (see
below)
SINT[468
] Varies Get
128 (0x80) N/A Input only heartbeat
1
Heartbeat 0 n/a
129 (0x81) N/A Listen only heartbeat
2
Heartbeat 0 n/a
Unused (n) N/A Configuration
3
1. This instance allows clients (PLCs) to monitor input data without providing output data.
2 This instance allows clients (PLCs) to monitor input data without providing output data.
To use this con
nection type, an owning connection must exist from a second client and
the configuration of the connection must match exactly.
3 Configuration data is not required, but it must match i
f supplied. Contents of the config-
uration instance are yet to be determined.
Table 7. T2O (Input) Assembly Data Format
Byte Description Data Type Class ID Inst ID Attr ID
0 – 3 Discrete Inputs DWORD 0x64 0x01 1
4 – 7 Barcode Scanner Status DWORD 0x64 0x01 2
8 – 9 Item Sequence Number UINT 0x64 0x01 3
10 – 11 Item Total Size UINT 0x64 0x01 4
12 – 13 Fragment Sequence Number UINT 0x64 0x01 5
14 – 15 Fragment Size UINT 0x64 0x01 6
16 – 465 Fragment Data USINT[450] 0x64 0x01 7
466 – 467 Reserved (for 32-bit align-
ment)
UINT N/A N/A N/A
468 – 469 Last Output Item Sequence
Number
UINT 0x64 0x01 15
470 – 471 Reserved (for 32-bit align-
ment)
UINT N/A N/A N/A
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