Yokogawa Touch Screen GP20 - Manual (Page 131)

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IM 04L51B01-01EN
Configuring the GX/GP
1
2
3
4
5
App
Preset value 1
Setup Item Selectable Range or Options Default Value
Preset value –9.999999E+29 to 9.999999E+29
–9.9999999E+29 to –1.0000000E–30, 0,
1.0000000E-30 to 9.9999999E+29
0
1 Appears when On/Off is set to On.
Preset value
Set the preset value.
Watchdog timer
Setup Item Selectable Range or Options Default Value
On/Off Off, On Off
Timer 1 1 to 120 (s) 30
Value at timer-expired 1 Last value, Preset value Last value
1 Appears when the watchdog timer is set to On.
On/Off
Set this to On to use the watchdog timer.
Timer
Set the duration for monitoring values that fail to be updated.
If a value is not updated within the specified duration, the value is replaced.
Value at timer-expired
Set whether to set the value when the timer expires to the last value or preset value.
Explanation
Watchdog Timer Function
Data may fail to be updated due to Modbus or other communication problems. The
watchdog timer function replaces values with preset values or last values at power-on and
when values are not updated within the specified duration (timer).
Data replacement occurs immediately at power-on and the timer expires, and the values are
held until the next communication interval.
Timer
Power on
Data not updated
Communication
channel data
Replace data
A B C D E E E
Preset value: Z
Z Z
F G
Read cycle
Replace data
Communication data
H
1.15 Configuring Communication Channels (/MC option)