In EcoStruxure Machine Expert Basic, how do you pulse a bit after a short delay in Ladder Logic?
A program can be written comprised of three Variables and three Ladder Logic Rungs.Please see the example below.Goal:Turn on PULSEDBIT for 2 seconds after a 5 second delay after a rising edge (transition from FALSE to TRUE) from BUTTONPRESS.Variables:BUTTONPRESS (%M0) - the variable that triggers the sequence on rising edgeTIMERTRIGGER (%M1) - an intermediary variable that turns on the first timer in the programPULSEDBIT (%M2) - the boolean variable that we wish to turn on for 2s after 5s delayRung0: Rising Edge detection latch1) Create a Contact -| |- with BUTTONPRESS (%M0) assigned2) In parallel with the first Contact, add a second Contact with TIMERTRIGGER (%M1) assigned3) To end the ladder Rung, add a Set Coil -(S)- with BUTTONPRESS (%M0) assignedRung1: Delay timer1) Create a Contact -| |- with TIMERTRIGGER (%M1) assigned.2) In series to the contact, add a TON Timer (%TM0).3) Mouse over the TON Timer block and change the time to 5 seconds.4) To end the ladder Rung, add a Set Coil -(S)- with PULSEDBIT (%M2) assigned - this turns PULSEDBIT to TRUE after the 5s delayRung2: Turn ON PULSEDBIT for 2 seconds and reset all variables to FALSE1) Create a Contact -| |- with PULSEDBIT (%M2) assigned.2) In series to the contact, add a TON Timer (%TM0).3) Mouse over the TON Timer block and change the time to 2 seconds.4) To end the ladder Rung, add three parallel Reset Coils -(R)- with each of the three Variables assigned - this will reset all the variables back to FALSE once the timer sequences are completed.The completed project should appear as follows:
Example project (created in EcoStruxure Machine Expert Basic v1.0.0.63163):"PulsedBitExample.zip" - extract the PulsedBitExample.smbp project file
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