04/03/68 PLC MELSEC- iQF series FX5U PLC MELSEC- iQF series FX5U การเก็บส ารองโปรแกรม(Backup) 1.Capacitor Backup Backup time (days) 20 10 7 1 25 40 80 0 Ambient temperature( C) 2.Battery Backup 5 Years ( Within 5 Min. for Change ) 11