3-12Note:• The operating time for the instructions is as follows.F150 READ : 16.19+(0.84 x No. of words to read) μsF151 WRITE : 17.88+(0.77 x No. of words to write) μs• If all areas are read and written in one scan, the scanning time may be over.• If you try to READ/WRITE data in multiple addresses in one scan, arrange the instructions using theabove operating time as a guide.Battery errorWhen any error occurs in a backup battery, the input will be turned on as follows.[Example] When installing in the expansion unit 1 (slot No. 0)OFF Battery voltage is normal.X100 ON The battery voltage for memory backup decreased.Or the memory backup SW is off.Lights out Battery voltage is normal.BATT LED (Red) Lights The battery voltage for memory backup decreased.Or the memory backup SW is off.Note:• If an error with a battery is detected, backup the data within one month and replace the unit with a newone.3.4.3 Other Expansion UnitsFor other FPΣ expansion units, the dedicated manuals are available.Reference: <1.2.2 FPΣ expansion unit>
