5/31/2019 5:13 PM | |
Joined: 5/25/2017 Last visit: 9/19/2024 Posts: 7 Rating: (0) |
Hello all, my application is written by SFC , I have emergency stop pushbutton I want to make hold for the sequence if some one push the emergency stop . and resumed again if any one released the emergency stop how can I link between SFC and the pushbutton to make Hold. ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 06/03/2019 10:05:57New subject after splitting |
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6/1/2019 5:41 AM | |
Joined: 9/9/2015 Last visit: 10/10/2024 Posts: 728 Rating: (279) |
Let me give a suggestion, For SFC, there are inputs named "HOLD'" and " RESUME". When you press your button, HOLD= 1, the seq will go to HOLDING=1 and then HELD = 1. In the SFC sequencer, you can add a start condition for the sequence when HOLDING=1 Then you will have bit memory Command of VLV_X, PUMP_X, State_X. You will need to save the command/running/status for the Valves or Pumps into this bit. Then when RESUME = 1, the seq will go to RESUMING=1, and then Run =1. In the SFC sequencer, you can do the same, create another sequencer named RESUME. Start condition = resuming =1. Then you can restore the bit memory into the dedicated valve and pumps. Eventually, the pump will start/stop based on the initial status you stored on the bit memory. Hope it helps. |
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