Mitsubishi Electric MELSEC iQ-F FX5UC Series, User Manual

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14 PROCEDURES BEFORE OPERATION
14.9 Programming
Inserting program elements by key input
Program elements can be inserted by key input.
Procedure
Inserting a normally open contact of "Start1" in the program example, following the procedure below.
A new label can be registered during insertion. Enter the name of a new label on the ladder entry window, and
click the [OK] button. Then, specify the registered destination, class, and data type of the label on the
"Undefined Label Registration" window, and click the [OK] button.
Special relay for low battery voltage
Prepare a system which allows constant external monitoring of the battery status, using a device such as GOT.
• SM52 (SM8005)
The special relay turns on when the battery voltage is less than the specified value.
The special relay turns off when the battery voltage is normal.
• SM51 (SM8006)
The special relay turns on when the battery voltage is less than the specified value.
The special relay stays on even when the battery voltage is normal.
• SD8005
Battery voltage can be monitored.
1.
Click the insertion position on the ladder editor, and
press
 .
2.
Enter the name, "Start", in the entry field (1). Select
"Start1" from the displayed list (2).
3.
The normally open contact of "Start1" is inserted to the
program.
(1)
(2)
SM52(SM8005)
Battery low-voltage
Y1 is output when a battery low-voltage condition occurs. Y1