12-11
RLC-4 V1.79 Copyright © 1998 Link Communications Inc. 9/18/98
102: Set Conversion Ratio For Analog Input
This command allows you to select what scale the analog inputs are read on. This allows you to
use the analog inputs to read temperature on a scale from hundreds of degrees below zero to
hundreds above, battery voltage on a scale from 0 to 25 volts or wind direction from 0 to 360
degrees. Anything that can generate an analog voltage can be read on a scale appropriate to the
measurement. Unfortunately, this flexibility brings with it a little complexity. To make it easy, we
provide a chart of the common conversions you might use. If you want to use a conversion that is
not listed, read the explanations after the chart and study the examples on the chart. Once you see
the pattern, the calculations are not difficult.
Command Parameters Description Resolution
<102> x n wwww m zzzz General conversion form ....
<102> x 1 0460 0 0440 Farenheit temperature 1 degree, enter "101 x 0"
<102> x 1 0273 0 0227 Celcius temperature 1 degree, enter "101 x 0"
<102> x 0 0000 0 0005 0..5 volts 1 volt, enter "101 x 0"
<102> x 0 0000 0 0050 0..5 volts 0.1 volt, enter "101 x 1"
<102> x 0 0000 0 0500 0..5 volts 0.01 volt, enter "101 x 2"
<102> x 0 0000 0 0025 0..25 volts 1 volt, enter "101 x 0"
<102> x 0 0000 0 0250 0..25 volts 0.1 volt, enter "101 x 1"
<102> x 0 0000 0 2500 0..25 volts 0.01 volt, enter "101 x 2"
<102> x 0 0000 0 0100 0 to 100% 1 percent, enter "101 x 0"
<102> x 0 0000 0 0360 0 to 360 degrees 1 degree, enter "101 x 0"
Notes:
- Please note that regardless of the conversion used, the voltage entered must be between 0 and 5
volts when the voltage divider is not used, and 0 and 25 volts when it is used.
- For more information about hooking up a LM335Z temperature sensor, see Appendix H.
Parameters:
- 102 is the default command name.
- x is the analog input line number (1..4)
- n is 1 for negative, 0 for positive for the following number
- wwww is the reading with a 0 volt input with leading 0s if necessary
- m is 1 for negative, 0 for positive for the following number
- zzzz is the reading with a 5 volt input to the processor with leading 0s if necessary. If the
voltage divider is turned on, this is the reading with a 25 volt input.
To Next Page
Loading...
Need help?
General
