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31.3.5 System signal 2(Write device+4)
•Bit 0 : This bit is ON during one alarm monitor bit is ON. In case, monitor bit is ON, this bit
preserves the status.
•Bit 4 : It is ON when numeral input is completed. In case of numeral input or ASCII input tag, it is
ON when input value is registered correctly.
It is required to reset in PLC program because it is not reset automatically.
•Bit 8 : [Barcode input signal] It is set when completing the write of barcode input data from GP to
PLC.
•Bit C : It is set when battery is Low reading voltage status of backup battery.
31.3.6 System signal 4(Write device+5)
• Bit 0 : Flag of alarm print (1 for printing, 0 for other.)
• Bit 5 : 0.5sec clock
• Bit 6 : 1sec clock
• Bit 7 : 2sec clock
• Bit 8 : Communication port 1 Frame error
• Bit 9 : Communication port 1 Parity error
• Bit A : Communication port 1 Overrun error
• Bit C : Communication port 2 Frame error
• Bit D : Communication port 2 Parity error
• Bit E : Communication port 2 Overrun error
31.3.7 Time and date (7 points )
31.3.8 Reserved area (2 points )
User cannot use reserved area.