Hold Device Value - Panasonic GTWIN Reference Manual

Introducing GTWIN

Once the countdown starts, GT counts the elapsed value internally. Even if
the start value or elapsed value is changed during the countdown, the
countdown will not start from the changed value.

The countdown will stop temporarily when you enter the tab "Setup 1" in
the GT configuration dialog to set the clock or change the
contrast/brightness during the countdown. The countdown will restart once
you leave the GT configuration dialog.

The countdown will stop completely when you access the system menu. It
will not restart when you leave the system menu.

1.6.8 Hold Device Value

Hold Device Value tab for GT21 and an FP-Series PLC
Setup parameters
Field
Hold PLC Device Value
(Not available for
general purpose serial
communication)
Hold GT Device Value
38
Description
When you select "On", GT's SRAM holds the values specified for the PLC device
(Device plus Number of Words) in case batteries go dead, for example.
Data for PLC devices held in the GT will be written to the internal PLC device the next
time that the power supply is turned on.
If the power supply on the GT side is not turned on, the data can be held as long as
the backup for the internal battery lasts.
Select the device values, i.e. Data Register and Internal Relay values to hold in case
power is turned off.
GTWIN Reference Manual