Publication 1769-UM002B-EN-P - July 2005
4-28 Module Data, Status, and Channel Configuration for the Output Modules
Ramping only takes place, if configured, when the output is being commanded
to go to a fault state. Ramping is not done in normal run operation. 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 greater than
or equal to a minimum of 1% of the total number of full scale counts
for the channel’s selected data format (see Table 4.14 and Table 4.15 for
minimum values).
OR
• The number of counts entered for a channel’s ramp rate may be equal to
0 if ramping is not enabled for the channel.
Hold for Initialization
Hold for Initialization causes outputs to hold present state until the value
commanded by the controller matches the value held by the module providing
a bumpless transfer.
If Hold for Initialization is selected, outputs hold if any of these three
conditions occur:
• initial connection is established after power-up
• new connection is established after a communications fault occurs
• transition to Run Mode from Program state
The Output Held bit (see the Input Data file) for a channel indicates that the
channel is holding.
Percent of Full Scale
-10…+10V 10000 100 0.2V/s
0…5V 0.05V/s
0…10V 0.1V/s
1…5V 0.04V/s
Table 4.16 1769-OF8V Output Range/Types and Output Data Formats
Output Data
Format Output
Range/Type
Total Counts in
Full Scale
Number of Counts
for Every 1% of
Ramp Rate
Real Units/Second
for Every 1% of
Ramp Rate
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