Schneider Electric INTERBUS Basic Spécifications télécharger pdf (Page 73)

Fieldbus Communications Support

31004624 8/2009 73

The INTERBUS NIM supports a maximum of 32 modules. The first four bytes (15h–

18h) provide the 32 bits that represent the module locations in a typical island

configuration. The remaining diagnostic bytes are available to support island

expansion capabilities.

Node Operational (Selector 25h–34h)

Node operational is an array of 8 words. Each bit represents one specific

addressable I/O module on the island bus.

z A value of 1 in a bit position indicates that the associated module is operating and

that no faults were detected.

z A value of 0 in a bit position indicates that the module is not operating because it

is not configured or it has an error.

When the selector value is from 25h to 34h, information about a particular module’s

operational status (according to the following table) is transmitted as the status

word’s low byte value:

The INTERBUS NIM supports a maximum of 32 modules. The first four bytes (25h–

28h) provide the 32 bits that represent the module locations in a typical island

configuration. The remaining diagnostic bytes are available to support island

expansion capabilities.

. . .

23h 120 119 118 117 116 115 114 113 modules 113–120

24h 127 126 125 124 123 122 121 modules 121–127

Selector Value Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Status Data

25h 8 7 6 5 4 3 2 1 modules 1–8

26h 16 15 14 13 12 11 10 9 modules 9–16

27h 24 23 22 21 20 19 18 17 modules 17–24

28h 32 31 30 29 28 27 26 25 modules 25–32

. . .

33h 120 119 118 117 116 115 114 113 modules 113–120

34h 127 126 125 124 123 122 121 modules 121–127

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 169 170

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Schneider Electric INTERBUS Basic Spécifications Page 73