• Digital Outputs: all OFF,
• Auxiliary Relays: all OFF,
• Timers: all with RESET input is pulsed before scan,
• Counters: all with RESET input is pulsed before scan,
• Fast Input Counters: all OFF, loaded with Presets
• Counter Comparators: all OFF,
• State Machines: starts from State 1, with all outputs OFF,
• Front Panel F Keys: same as front panel F keys,
• Filtered Front Panel F Keys: depends on filter time and front panel F key status,
• Timer Ticks: all OFF,
• Run Time Screens: all OFF,
• Analog Comparators: all OFF,
• System Flags (Contacts):
o PowerONRst: 0.5 seconds ON then OFF,
o ErrRetention: ON if non volatile memory read error, else OFF,
o ErrPTCI: depends on sensor,
o ErrPTC2: depends on sensor,
o ErrCommAny: OFF,
o ErrCommGl: OFF
4.3 Rising Edge I Falling Edge Generation after Power on Rising Edge / Falling Edge generation is inhibited while PowerONRst is ON (the first 0.5 sec. after scanning starts). After that, Rising Edge / Falling Edge generation is enabled.
Starting an application with a user approval after power on, i.e. user presses to a switch to start, will be an appropriate design approach.
4.4 Input Edge Detection of Ladder Components after Power on
Input edge detection of ladder components is not allowed during the first scan cycle after Power is on. For example, a counter does not count when a rising edge exists at its “Count” input during the first scan cycle, but it counts at the next cycles.