HINT

Example of alarm output to external device (lamp, buzzer, etc.)

The following describes an example of outputting the battery voltage low signal from a FX series PLC to an external device with system information.

Condition: The Write Device is "D20" and all data is used (the button is clicked on the setting screen of drawing software) for the system information assignment.

D36 b12: Battery voltage low (System Signal 2-2) Turned on upon a battery voltage drop.

Used as shown below in the sequence program.

RUN monitor

 

M8000

 

MOV D36

K4M20

Battery voltage low

Output to external device of PLC

M32

Y***

Activated the output upon battery

voltage low detection.

 

"*" indicates the output number at which the external device is connected.

For details of system information, refer to the following.

GT Designer3 Version1 Screen Design Manual (Fundamentals)

17

INSPECTION

MAINTENANCE AND

18

APPENDICESTROUBLESHOOTING

17. MAINTENANCE AND INSPECTION

17 - 5

17.4 Battery Voltage Low Detection and Battery Replacement