Rockwell Automation 1788-CN2FF ControlNet-to-FOUNDATION Fieldbus H1 Linking Device User Manual - Manual (Page 41)

1788-6.5.1 - January 1999
Using the ControlNet-to-FOUNDATION Fieldbus H1 Linking Device 4-15
Table 4.E describes the attributes placed into the input and output assembly
for each object type.
MAI Blocks
For each MAI block configured in the linking device beginning with the
lowest numbered module, each channel that is connected to a Fieldbus
function block has attributes 3, 4, and 150 placed into the required input
assembly object. Each MAI channel requires 6 bytes in the input assembly
object.
MAO Blocks
For each MAO block configured in the linking device beginning with the
lowest numbered module, each channel that is connected to a Fieldbus
function block has attributes 3, 4, and 155 placed into the required output
assembly object. Additionally, if your controller participates in cascade
initialization for a specific channel (wiring BKCAL_OUT from AO),
attribute 154 is placed into the required input assembly. Each MAO channel
requires 6 bytes in the output assembly object and 6 bytes in the input
assembly, if cascade initialization is performed—4 bytes in the input
assembly if cascade initialization is
not performed.
Table 4.E Attributes in Input and Output Assemblies
Object Type
Attributes in Input
Assembly
Attributes in Output
Assembly
AI 3, 4, 150
AO
(CAScade initialization) 153, 154 3, 4, 155
AO
(NO CAScade
initialization) 153 3, 4, 155
DI 3, 4, 150
DO
(CAScade initialization) 153, 154 3, 4, 155
DO
(NO CAScade
initialization) 153 3, 4, 155