![]() If the stop inputs have NOT been triggered, the Start Command latch will still be active. So, when the PLC scan cycles back to the top and moves through the rungs. That’s not the end of the story, because the siren is still activated. ![]() The scan then jumps to the last rung and if the Start Command is TRUE then timer T1 is activated.Īfter the Start Command is TRUE for ten seconds (preset time) the T1 ON delay timer will activate the M1 Run output. Please Note – The M1 Run symbol is triggered from the third rung. If the Start Command is TRUE from the motor control latching logic on the first rung and the M1 Run output is FALSE (motor is not running) then the Siren output is activated. So now we can use the Start Command latch to trigger multiple actions.Īfter the first rung is scanned it moves to the second rung. The difference is we replace the M1 Run output with an internal variable called Start Command. The first rung works the same as the standard motor control latching logic. Motor Control Ladder Diagram – Delay Start Warning Siren ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |