Setting The A/D Integral Time - YOKOGAWA GX20 User Manual

1.11 Setting Measurement Conditions (Scan interval, A/D integrate, etc.)
1.11.4

Setting the A/D Integral Time

Path
Description
Explanation
1-122
This setting is not available on a high-speed AI or PID control module.
GX/GP: MENU key > Browse tab > Setting > Setting menu Measurement settings >
Select unit Main unit or Unit1 to 6 > Module 0 to 9
Web application: 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.
A/D integrate
Setup Item
A/D integrate
2 Common appears when the scan interval is 500 ms (1 ms for low withstand voltage relay type)
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 or 6ch 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).
• If the 12 VDC power supply (GP10-1J2W) is in use, 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, 20ms, 36.67 ms or 100 ms.
Integration time and scan interval by module
Universal
Current (mA)
4-wire RTD/resistance
Electromagnetic relay
Low withstand voltage
relay
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.
Selectable Range or Options
Auto, 50Hz, 60Hz, Common
Type Integration time
36.67ms
100ms
36.67ms
100ms
1
Default Value
2
Auto
Scan interval
10ch mode,
6ch mode
1s
2s or 5s
2s
5s
2ch mode
–
–
IM 04L51B01-01EN