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 edge
TIMERTRIGGER (%M1) - an intermediary variable that turns on the first timer in the program
PULSEDBIT (%M2) - the boolean variable that we wish to turn on for 2s after 5s delay
Rung0: 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) assigned
Rung1: 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 delay
Rung2: 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
Udgivet til: Schneider Electric Danmark