Rockwell-automation 198 Series C Modular DeviceNet Starter Auxiliary U Manual de usuario descargar pdf (Pagina 150)

A-16 DeviceNet Information

Publication 198-UM002A-EN-P December 2001

Instance 107

This is the default input (produced) assembly for the Cat. No. 198-DN. It was included in the

Series B MDSA as the default produced assembly. It is 20 bytes long (the MDSA can

accommodate 16 I/O modules, plus 4 bytes of status). It has the following format:

I/O Modules and “Nibble-wise” I/O Assemblies

When “Nibble-wise” assemblies are chosen, each I/O Module on an MDSA back-plane will

contribute 1 nibble (4 bits) of data to the assembly data. The “nibble-wise position” within

the assembly is dependent upon the I/O module position on the back-plane. The I/O

module that is physically closest to the DeviceNet Module appears at the lowest “nibble-wise

position” within each assembly. These assemblies were originally defined for Series B MDSAs

as a way to reduce the size of the assemblies, and thus reduce network traffic and conserve

scanner-mapping space.

Table A.23 Instance 107 — Default Input Assembly Instance for Cat. No. 198-DN

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 7 Location 6 Location 5 Location 4 Location 3 Location 2 Location 1 Location 0

3 Error 7 Error 6 Error 5 Error 4 Error 3 Error 2 Error 1 Error 0

4 Module 1 data

5 Module 2 data

6 Module 3 data

7 Module 4 data

8 Module 5 data

9 Module 6 data

10 Module 7 data

11 Module 8 data

12 Module 9 data

13 Module 10 data

14 Module 11 data

15 Module 12 data

16 Module 13 data

17 Module 14 data

18 Module 15 data

19 Module 16 data

1 2 ... 145 146 147 148 149 150 151 152 153 154 155 ... 175 176

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Rockwell-automation 198 Series C Modular DeviceNet Starter Auxiliary U Manual de usuario Pagina 150