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4.9 Operation without Mounting Battery
4
SETTINGS AND PROCEDURE TO OPERATION
4.9 Operation without Mounting Battery
This section explains operation without mounting a battery to the MES interface module.
(1) Shutdown operation required when the programmable controller is powered
OFF while the MES interface module is operating without battery
If the file protection battery is not mounted to the MES interface module, make sure to
perform shutdown operation when the programmable controller is powered OFF.
When the programmable controller is powered OFF without mounting the battery,
data such as setting information and system data may be lost.
(a) Operation procedure
1 Stop file access.
(Turn the File access stop request (Y2) ON from OFF.)
2 Confirm that file access has stopped.
(Check the File access status (X2) is turned ON.)
3 Power OFF the programmable controller CPU.
If the shutdown operation is not performed before powering OFF a programmable
controller even though the MES interface module is operating without battery, data
in the CompactFlash card being accessed may be corrupted or a file system error
may occur.
(2) Making battery error undetected during operation without battery
1 A battery error occurs when the file protection battery is not mounted to the MES
interface module.
• "1 (ON)" is written to the Battery status area (Buffer memory address: 7).
• The ERR. LED is turned ON, and ERR. LED status (X10) and Other error
(X1C) are turned ON.
2 Battery errors are not detected by turning "ON" the battery error detection setting
(Switch 2 (Bit 2)) with intelligent function module switch setting of GX Developer.
Refer to the following for the intelligent function module switch settings of GX
Developer.
Section 4.5 Intelligent Function Module Switch Settings
Figure 4.21 Shutdown operation required when the programmable controller is powered OFF while the MES interface module is
operating without battery
File access stop request (Y2)
File access status (X2)
(During stop)
(In operation)
Power OFF the programmable controller.