Rockwell-automation 198 Series C Modular DeviceNet Starter Auxiliary U Manual de usuario descargar pdf (Pagina 153)

DeviceNet Information A-19

Publication 198-UM002A-EN-P December 2001

Nibble-wise Input (Produced) Assemblies

Instance 101

This input (produced) assembly was included in the Series B MDSA. Its length (in bytes) can

be calculated as follows:

(I/O module + 1 + (no. of IB2XOB2S modules) / 2) + 5

Unlike the “Byte-wise” output assemblies whose “location” bits operate as a binary location

count, the above “Nibble-wise” assembly contains a single location bit for each possible

module. The error location is simply given by setting the corresponding bit, rather than

generating a binary coded module number.

Custom Parameter Based “Word-wise” I/O Assemblies

The contents of these assemblies are determined by contents of the “Assembly Word X”

parameters in the EDS files.

Table A.28 Instance 100 — Nibble-wise Output Assembly Instance

Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

0 Module 2 data Module 2 data

1 Module 4 data Module 4 data

: : :

N/2

Table A.29 Instance 101 — Nibble-wise Input Assembly Instance

Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

0 Status 8 Status 7 Status 6 Status 5 Status 4 Status 3 Status 2 Status 1

1 Status 16 Status 15 Status 14 Status 13 Status 12 Status 11 Status 10 Status 9

2 Location 8 Location 7 Location 6 Location 5 Location 4 Location 3 Location 2 Location 1

3 Location 16 Location 15 Location 14 Location 13 Location 12 Location 11 Location 10 Location 9

4 Error code

5 Module 2 data Module 1 data

6 Module 4 data Module 3 data

: : :

(N+5)/ 2

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 175 176

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Rockwell-automation 198 Series C Modular DeviceNet Starter Auxiliary U Manual de usuario Pagina 153