Specifications

Fieldbus Communications Support
72
31004624 8/2009
Node Configured (Selector 05h–14h)
Node configured 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 corresponding module is configured
in the island system.
z A value of 0 indicates that the node is not configured as a slave to the master.
When the selector value is from 05h to 14h, information about a particular module’s
configuration (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 (05h–
08h) 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 Assembly Fault (Selector 15h–24h)
Node assembly fault is an array of 8 words. Each bit represents one specific module
(node) on the island bus. If the configuration of a module mismatches, the
corresponding bit is set:
z A value of 1 in a bit position indicates that the configured module is not present
or that the location has not been configured.
z A value of 0 indicates that the correct module is in its configured location.
When the selector value is from 15h to 24h, information about a particular module’s
assembly fault (according to the following table) is transmitted as the status word’s
low byte value:
Selector Value Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Status Data
05h 87654321modules 1–8
06h 16 15 14 13 12 11 10 9 modules 9–16
07h 24 23 22 21 20 19 18 17 modules 17–24
08h 32 31 30 29 28 27 26 25 modules 25–32
. . .
13h 120 119 118 117 116 115 114 113 modules 113–120
14h 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
15h 87654321modules 1–8
16h 16 15 14 13 12 11 10 9 modules 9–16
17h 24 23 22 21 20 19 18 17 modules 17–24
18h 32 31 30 29 28 27 26 25 modules 25–32