Beckhoff First Scan Bit 〈TRUSTED ◉〉

PROGRAM MAIN VAR bFirstScan : BOOL; rst : BOOL; END_VAR

Retain variables survive a warm start but may be invalid after a cold start or program change. beckhoff first scan bit

PROGRAM SafeStartup VAR fbFirstScan : FB_FirstScan; bStartupComplete : BOOL; bResetDrives : BOOL; tStartupTimer : TON; END_VAR PROGRAM MAIN VAR bFirstScan : BOOL; rst :

What the first scan bit is

IF fbFirstScan.bFirstScan THEN // First scan actions here bInitDone := FALSE; (* Set safe output states *) bEmergencyStop := FALSE; nMotorSpeed := 0; PROGRAM MAIN VAR bFirstScan : BOOL