Omron CQM1H - 08-2005, Operation Manual

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5-3 Operation Mode
Settings The operation mode is selected with the operation mode A set command or op-
eration mode B set command.
The following four items can be selected for the Unit with the operation mode A
set command.
•
Data Input
Measurement Mode or Comparison Mode:
When the Unit is in measurement mode, the binary-coded scaled conversion
data is stored in the input word allocated to the Unit. When the Unit is in com-
parison mode, the Comparison Result Flags of the input word allocated to the
Unit are turned ON or OFF after comparing the set value and scaled conver-
sion data. When any overrange or sensor disconnection is detected by the
Unit, the Overrange or Sensor Disconnection Flag of the input word is turned
ON. The measurement mode is the factory setting.
•
Timing Hold
Normal, Sampling Hold, Maximum Hold, Minimum Hold, Peak-to-peak
Hold:
When setting the initial values, one of the five timing holds can be selected for
the Unit. The timing hold is factory-set to normal.
•
Input Type
±
9.999 V,
±
5 V, 1 to 5 V, or 4 to 20 mA:
When setting the initial values, any input type among four input types can be
selected for the Unit. The
±
9.999 V input type is the factory setting.
•
Monitor Output (CQM1-LSE02 Only)
Scaled Conversion Data Monitor Mode or Set Data D/A Output Mode:
The CQM1-LSE02 has a monitor output terminal, to which simple monitoring
devices, such as the K3TE Digital Panel Meter, can be connected. In the
scaled conversion data monitor mode, the Unit outputs the voltage corre-
sponding to the scaled conversion data. In the set data D/A output mode, the
monitor output terminal has voltage output corresponding to the data which is
written to the output word allocated to the Unit. The scaled conversion data
monitor mode is the factory setting.
It is possible to select any of the following three items for the Unit with the opera-
tion mode B set command.
•
Input Sampling Speed
Fast or Slow:
The sampling time and period can be set to fast or slow according to the type of
sensing object considering the relationship between the measuring accuracy
and measuring speed. The sampling time/period is factory-set to slow.
•
Number of Averaging Process Times
1, 2, 4, 8, or 16:
For more precise sampling, it is possible to take an average of a designated
number of samples. The number is factory-set to 4.
•
Zero Shift Value Storage Area
RAM or Nonvolatile Memory:
The Unit has a forced zero function that will become active with external signal
input to the Unit. The RAM or nonvolatile memory can be selected to store the
zero shift value. The RAM is factory-set to store the zero shift value.
Note The zero shift value stored in the RAM will be lost when the Unit is turned OFF.
The RAM should be used to store the zero shift value if the forced zero function is
frequently used. The zero shift value stored in the nonvolatile memory will not be
lost when the Unit is turned OFF. The zero shift value stored in the nonvolatile
memory may not be, however, used more than 100,000 times. Decide where to
keep the zero shift value according to the application.
Operation Mode
Section 5-3