Omron CQM1 - Page 120

101
Programming and Adjustment Section 3-3
3. Obtain the minimum value of the sensing object. For a sensing operation,
for example, set the sensing object so that the output value of the sensor
or transducer will be minimum. For temperature measurement, it may be
difficult to obtain the minimum value. In that case, instead of using the sen-
sor or transducer, use a reference power supply to obtain the output at the
lowest temperature.
4. Put the CQM1H/CQM1 into operation mode or monitor mode and use the
peripheral device to monitor the word (DM0200) in which the scaled con-
version data is stored. The conversion data will be the lower-limit value.
5. Apply the same method to the analog input maximum value to obtain the
upper-limit value.
6. Create the following program to scale values in a range between the lower-
and upper-limit values and designate the lower and upper limit values that
has been monitored as parameters. Refer to page 96, Scaling for details.
* "n" indicates the allocated word for analog input.
ANDW(34)
#0FFF
n
DM 0200
XORW(36)
#0800
DM 0200
DM 0200
SCL(66)
DM 0200
DM 0100
DM 0000
00000
DM 0101
DM 0100 0000 Insert the conversion value corresponding to the minimum value.
Insert the monitor value "lower limit value."
DM 0102
0100
Insert the conversion value corresponding to the maximum value.
DM 0103 Insert the monitor value "upper limit value."
Set value