Omron CQM1 Operation Manual page 118

Programming and Adjustment
3-3-2 Adjustment
0 to 10 V, 1 to 5 V,
or 4 to 20 mA
1,2,3...
to the word that stores the result. DM 0000 to DM 0011 are secured in the
example program.
Input condition
* "n" indicates the allocated word for analog input.
The accuracy of the Analog Input Unit is 1% without adjustment. If this is
adequate, the user need not adjust the Analog Input Unit. Fine tuning of the
Analog Input Unit is explained in this section.
The Analog Input Unit is adjusted with parameters set with the SCL instruc-
tion.
If the Analog Input Unit is set to a range of 0 to 10 V, 1 to 5 V or 4 to 20 mA,
follow the steps described below to adjust the Analog Input Unit.
1. Refer to 3-1 Settings and connect the Analog Input Unit, CPU, and sensor
or transducer.
2. Connect a peripheral device such as a Programming Console to the CPU
(in any mode) and monitor the allocated word of the analog input to be ad-
justed.
Peripheral device
Sensing object
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.
PS CPU OUT IPS
IN
Sensor or transducer
Section 3-3
ANDW(34)
#0FFF
n
DM 0200
XORW(36)
#0800
DM 0200
DM 0200
AVG( )
DM 0200
#0300
DM 0000
AD AD OUT
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