GP-Pro Ex Reference Manual - A.2.1.1 Bit Type Logic System Variables

Variable Name	Description	READ	WRITE
Ladder Reference Flag
#L_RunMonitorA	ON while in RUN mode	○	×
#L_AlwaysON	Always ON	○	×
Calculation Flag
#L_CalcZero	Zero flag	○	×
#L_CalcCarry	Overflow flag	○	×
System Settings
#L_ScanModeSW	Logic Mode Setting	○	×
#L_AutoRunSW	Mode setting at startup	○	×
#L_InOutSW	Enabling external input and output enable setting	○	×
#L_FaultStopSW	Continue on error switch setting	○	×
#L_SyncRunSW	Synchronous Communication with External Devices/PLCs	○	×
Operation Information
#L_UnlatchClear	Reset to zero for volatile areas	○	○
#L_LatchClear	Reset to zero for retentive areas	○	○
Time
#L_Clock100ms	100 millisecond clock pulse	○	×
#L_Clock1sec	1 second clock pulse	○	×
#L_Clock1min	1 minute clock pulse	○	×
Address Refresh
#L_RefreshEnable	Address Refresh Enable Flag	○	×
Error information
#L_BatteryErr	Battery malfunction	○	×
#L_Error	Logic error	○	×
#L_StopPending	Logic stop wait flag	○	○
#L_Fault	Error handler stop flag	○	○
#L_IOFault	I/O error flag	○	×

ON when the logic program is running, and OFF when the logic program is not running.

Because this is a read-only area, writing is not possible. If you write in this area, the operation may fail.

On at the beginning of a logic scan, regardless of whether or not the logic program is used.

Because this is a read-only area, if OFF is written, in the program below the #L_AlwaysON bit is turned OFF.

ON is rewritten at the beginning of the next scan. Do not perform a write operation for #L_AlwaysON.

After the execution of an operation, #L_CalcZero rewrites OFF or ON. Because this is a read-only area, writing is not possible.

Depending on the result after the execution of an operation, #L_CalcCarry turns ON only when a overflow occurs.

Every time an operation is executed, the contents of #L_CalcCarry are rewritten.

After the execution of an operation, #L_CalcCarry rewrites OFF or ON. Because this is a read-only area, writing is not possible.

When #L_ScanModeSW is ON, operation is in CPU Scan Percentage mode. When #L_ScanModeSW is OFF, operation is in Fixed Scan Time mode. Because this is a read-only area, writing is not possible.

If the external input and output settings are enabled in the action settings at power ON, #L_InOutSW turns ON.

If the external input and output settings are disabled in the action settings at power ON, #L_InOutSW turns OFF.

When the continue on error switch is set to enable (stop when a countinuous error occurs), #L_FaultStopSW turns ON.

When the continue on error switch is set to disable (continue when a coutinuous error occurs), #L_FaultStopSW turns OFF.

If communication with external devices/PLCs is synchronized in the action settings when powering ON, #L_SyncRunSW turns ON.

If communication with external devices/PLCs is not synchronized in the action settings when powering ON, #L_SyncRunSW turns OFF.

By turning ON #L_UnlatchClear, zero clear of the clear area is requested. (An up edge is detected and the area is cleared to zero.)

The setting value and time base of the timer and the setting value of the counter cannot be cleared to zero. The system variables and addresses of the connection devices cannot be cleared to zero.

By turning ON #L_LatchClear, zero clear of a retentive area is requested. (A rising edge is detected and the area is cleared to zero.)

The setting value and time base of the timer and the setting value of the counter cannot be cleared to zero. The system variables and addresses of the connection devices cannot be cleared to zero.

The variable turns ON and OFF repeatedly with a frequency of 50 milliseconds OFF time and 50 milliseconds ON time.

When the Scan Time is longer than the clock pulse, ON and OFF are not repeated. Confirm and set the Scan Time.

The variable turns ON and OFF repeatedly with a frequency of 500 milliseconds OFF time and 500 milliseconds ON time.

When the Scan Time is longer than the clock pulse, ON and OFF are not repeated. Confirm and set the Scan Time.

The variable turns ON and OFF repeatedly, with a frequency of 30 seconds OFF time and 30 seconds ON time.

When the Scan Time is longer than the clock pulse, ON and OFF are not repeated. Confirm and set the Scan Time.

If this bit turns ON, the #L_BatteryErr bit does not turn OFF until the display unit is reset or the power turns OFF.

If this bit turns ON, the #L_Error bit does not turn OFF until the display unit is reset or the power turns OFF.

Until #L_StopScans is zero, the #L_StopPending bit remains ON for the duration of the scans until the logic stops.

This flag is referenced at the end of the "error handler" subroutine to determine whether to stop or continue the execution of the logic program.

The execution of the logic program on the display unit will stop at the end of ERRH routine if the #L_Fault bit is ON.

#L_IOFault turns ON if an I/O error occurs on the I/O driver and an error status is stored in #L_IOStatus. Internal I/O Driver errors are stored in #L_IOFault[1], while external I/O Driver errors are stored in #L_IOFault[2].

A.2.1.1 Bit Type Logic System Variables - #L System Variables