Yokogawa Touch Screen GP20 - Manual (Page 91)

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IM 04L51B01-01EN
Configuring the GX/GP
1
2
3
4
5
App
1.7.4 Setting the A/D Integral Time
Path
GX/GP: MENU key > Browse tab > Setting > Setting menu Measurement settings >
Module settings Select module > Module 0 to 9 1
Web browser: Config. tab > Measurement settings > Module settings
Hardware configurator: Measurement settings > Module settings
1 The module numbers that appear depend on the GX/GP module configuration.
Description
A/D integrate
Setup Item Selectable Range or Options Default Value
A/D integrate Auto, 50Hz, 60Hz, Common 2 Auto
2 Common appears when the scan interval is 500 ms or longer.
A/D integrate
Set the module’s A/D integration time. The available options appear depending on the scan
interval setting.
Options Description
Auto • The GX/GP automatically detects the power supply frequency and sets the
A/D integration time to 16.67 ms for 60 Hz and 20 ms for 50 Hz.
However, if the module operation mode is 10ch and the scan interval is 100 ms
or 200 ms, the A/D integration time is fixed at 1.67 ms.
• If you are using the 24 VDC power supply on models with the 24 VDC/AC
power supply (/P1 option), the A/D integration time is fixed to 20 ms
(50 Hz).
50Hz Sets the integration time to 20 ms.
60Hz Sets the integration time to 16.67 ms.
Common Sets the integration time to 16.67ms, 36.67 ms or 100 ms.
Integration time and scan interval by module
Type Integration time
Scan interval
10ch Normal
mode
2ch Only, Low
noise mode
Semi conducor
scanner
36.67ms 1s or more
100ms 2s or 5s
Electromagnetic
relay scanner
36.67ms 2s –
100ms 5s –
Explanation
Integration Time of the A/D Converter
The GX/GP uses an A/D converter to convert sampled analog signals to digital signals. By
setting the integration time of the A/D converter to match the time period corresponding
to one cycle of the power supply or an integer multiple of one cycle, the power supply
frequency noise can be effectively eliminated.
Common (36.67 ms/100 ms) can specified to effectively eliminate power supply frequency
noise for both 50 Hz and 60 Hz.
1.7 Setting Measurement Conditions (Scan interval, A/D integrate, etc.)