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NXC-VAI4 Analog Voltage Control Card
34
NetLinx Cardframe, Control Cards, and NetModules
NXC-VAI4 Send_Commands (Cont.)
Command
Description
PE
Selects which voltage
reference (if any) is to be
used for scaling of the output
voltage.
The specified output will then remain proportional to the specified input.
Syntax:
SEND_COMMAND <DEV>,'P<OUTPUT>E<REFERENCE SELECTION> B|U'
Variables:
OUTPUT: any Output ('1', '2', '3', or '4')
Reference selection:
’N’ - Normal/None: Uses no reference scaling.
’E’ - External: Use the External Reference input to scale the output.
’I’ - Input: Use the corresponding <x+4> input as the reference for the
output.
B|U: Bipolar or Unipolar (has no meaning for reference selection 'N')
Unipolar mode sets the voltage range to between 0V and +reference
voltage.
Bipolar mode sets the output voltage range to between -reference voltage
and +reference voltage.
Examples:
SEND_COMMAND <DEV>,'P1EN'
Sets Output 1 to use no reference (MIN/MAX limits are used instead.).
SEND_COMMAND <DEV>,'P3EEU'
Sets Output 3 to use the External Reference input for scaling. The output
voltages will range from 0 to the external reference voltage.
SEND_COMMAND <DEV>,'P3EIB'
Sets Output 3 to use Input 7 for scaling. The output voltages will range
from -input reading to +input reading.
PL
Ramps the specified output
from its current level value to
the specified level value or
specified percentage of
maximum at the rate
specified by "CURRENT
OUTPUT <x> RAMP UP
TIME" or optionally in the
specified amount of time.
Syntax:
SEND_COMMAND <DEV>,'P<OUTPUT>L<LEVEL VALUE> [T<TIME>]'
Variables:
OUTPUT: Any Output ('1', '2', '3', or '4')
LEVEL VALUE: 0 - 255 or 0 - 100% (where 0 is low voltage)
TIME (optional): 0 - 255 in 0.1 second increments
Examples:
SEND_COMMAND <DEV>,'P1L50%'
Ramps Output 1 from its current value to 50% (mid voltage level) at the
"CURRENT OUTPUT 1 RAMP RATE".
SEND_COMMAND <DEV>,'P2L255T30'
Ramps Output 2 to maximum voltage level in 3 seconds.
PN
Sets the value of either the
minimum output voltage
allowed for an output, or the
minimum position voltage
expected for an input.·
Voltage settings are rounded to the nearest D/A or A/D code. Voltage settings
for Outputs are absolute levels and are unaffected by any software scaling
functions. Negative voltages are not valid for Input 3.
Syntax:
SEND_COMMAND <DEV>,'P<I/O>N<LEVEL VALUE>'
Variables:
I/O: Any input or output ('1','2','3','4','5','6','7','8')
LEVEL VALUE: -12.000V to +12.000V
Examples:
SEND_COMMAND <DEV>,'P1N5.023V'
Sets the minimum output level for Output 1 to 5.023V.
SEND_COMMAND <DEV>,'P1N-5.023V'
Sets the minimum output level for Output 1 to -5.023V.
SEND_COMMAND <DEV>,'P7N5.023V'
Sets the minimum of the expected input range for Input 7 to 5.023V.
Summary of Contents for NetLinx NXC-COM2
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