１１-２ Using The Comparator Output - A&D AD-8922A Instruction Manual

１１-２ Using the Comparator Output
To use the comparator output, perform the following four steps.
1. Connect the peripheral to the AD-8922A-04 DIN connector.
2. Set the "Comparator (Cp fnc)" of the AD-8922A function setting. For details, see "4. FUNCTION
SETTINGS".
3. Set the upper and lower limit values. For details, see "11-3 Setting the Upper and Lower Limit
values".
4. When the weighing data is received, the comparison results will be output.
When the weighing data is equal to or less than the upper limit value, and equal to or greater than
the lower limit value, the OK comparator will be output.
Comparator output
>
Weighing data upper limit
≥
Upper limit weighing data
<
Weighing data lower limit
Whether or not to sound the buzzer when the contact output is shorted
can be set in the "Buzzer mode (bep) of the "Comparator (Cp fnc)".
Note: When setting the upper and lower limit values, make sure that the upper limit value is
greater than the lower limit value.
Function setting
The function setting "Cp fnc" is available only when the AD-8922A-04 is installed.
Class
Cp
Comparator
mode
Cp fnc
Comparator
bep
LO buzzer
bep-
OK buzzer
bep
HI buzzer
Note: "Near zero" indicates the amount of ten digits (Digit = the smallest displayable weighing
value).
LO
Open
≥
lower limit Open
Short
Item Parameter
0
1
2
3
4
5
0
1
0
1
0
1
Factory setting
OK HI
Open Short
Short Open
Open Open
Description
No comparison
Comparison, excluding "near zero" when the value is
stable or overloaded
Comparison, including "near zero" when the value is
stable or overloaded
Continuous comparison, excluding "near zero"
Continuous comparison, including "near zero"
Contact-outputs the second header information of the data
received. (Applicable to AD-4212A, GP and GX-K)
OFF
Selects whether or not to sound the
buzzer when LO.
ON
OFF Selects whether or not to sound the
buzzer when OK.
ON
OFF Selects whether or not to sound the
buzzer when HI.
ON
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