Rockwell Automation Allen-Bradley 1769-IF4, Руководство пользователя

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Publication 1769-UM002B-EN-P - July 2005
Module Data, Status, and Channel Configuration for the Output Modules 4-25
1769-OF8C and -OF8V Enable/Disable Channel
This configuration selection (bit 15) allows each channel to be individually
enabled.
Clamping/Limiting
Clamping limits the output from the analog module to remain within a range
configured by the controller, even when the controller commands an output
outside that range. This safety feature sets a high clamp and a low clamp.
Once clamps are determined for a module, any data received from the
controller that exceeds those clamps sets an appropriate limit alarm and
transitions the output to that limit but not beyond the requested value.
Table 4.13 1769-OF8C and -OF8V Output Channel Configuration
Define Indicate this These bit settings
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1769-OF8C
Output
Range
Select 0 to 20 mA dc 0 0 0
4 to 20 mA dc 0 0 1
Output
Data
Select Raw/Proportion
al Counts 0 0 0
Engineering
Units 0 0 1
Scaled for PID 0 1 0
Percent Range 0 1 1
1769-OF
8V
Output
Range
Select -10…+10V dc 0 0 0
0…5V dc 0 0 1
0…10V dc 0 1 0
1…5V dc 0 1 1
Output
Data
Select Raw/Proportion
al Counts 0 0 0
Engineering
Units 0 0 1
Scaled for PID 0 1 0
Percent Range 0 1 1
TIP
A channel that is not enabled has zero voltage or current at
its terminal.