Rockwell Automation 1790D-NOV2/TNOV2 CompactBlock LDX Analog Modules - Manual (Page 51)

Publication 1790-UM001A-EN-P - March 2002
Module Data, Status, and Channel Configuration for Analog Output Modules 4-7
Analog Output Data Format Analog output data is presented as raw/proportional. The full 12-bit
resolution is used over the entire span of the output full scale range,
as shown in Table 4.1.
Output Fault and Idle States Analog output fault (communication failure) and idle (processor in
program mode) state can be defined for each output. Both fault state
and idle state can have the behavior defined in Table 4.2 for each
output.
The user-specified value is entered in raw/proportional notation. For
example:
•
0 is the low clamp. This value equals 0mA or oV dc.
•
4095 is the high clamp. This value equals 20mA or 10V dc.
•
Values between 0 and 4095 denote proportional values. 2048
equals 10mA or 5V dc.
The values in the output data file are retained. Once a fault or idle
condition is cleared, the retained output values are sent to the analog
output channels.
Table 4.1
Module: Output Full Scale
Range: HEX Data Range: Decimal Data
Range: Output Resolution:
1790D-NOV2/-TNOV2 0-10V dc 0000-0FFF 0-4095 2.44mV
1790D-N0C2/-TNOC2 0-20mA 0000-0FFF 0-4095 4.88
µ
A
Table 4.2
Behavior: 1790D-N0C2/-TN0C2: 1790D-N0V2/-TN0V2:
Go to low clamp 0mA 0V dc
Go to high clamp 20mA 10V dc
Go to fault/idle value User configurable User configurable
Hold last state Hold last value Hold last value