Rockwell Automation 1769-OF4 Compact Analog Output Module - Manual (Page 40)

40 Publication 1769-UM020A-EN-P - December 2009
Chapter 3 Module Data, Status, and Channel Configuration
The ramp rate values are entered in the Configuration Data file and
are accepted as valid only if:
•
the number of counts entered for a channel’s ramp rate is
between a minimum of 1% and a maximum of 100% of the total
number of full scale counts for the channel’s selected data
format.
•
the number of counts entered for a channel’s ramp rate is equal
to zero and ramping is not enabled for that channel.
Type/Range Selection
This selection lets you configure each output channel individually and
provides the means of designating whether the output is a voltage or
current source. The output range for each output channel is also
configured by this selection.
Data Format Selection
This selection configures each output channel to accept digital data in
any of the following formats:
•
Raw/Proportional Data
•
Engineering Units
•
Scaled-for-PID
•
Percent Range
See Valid Output Data on page 41 .
Raw/Proportional Data
The value sent by the controller to the output channel is proportional
to the selected output and scaled into the maximum data range
allowed by the bit resolution of the D/A converter. For example, the
data value range for a ±10V DC user input is -32,767…32,767, which
covers the full-scale range of -10.5…10.5V.
TIP
N
Not all controllers support alternate output states and this
function. Refer to your controller’s user manual for details.