To solve your issue with creating a binary bit memory to jump between custom sequencers using SFC in PCS7, consider these points:

1. Using SFC Jumps: Ensure that the "jump" element in SFC is correctly configured. According to the manual, jumps can be set between steps within sequencers to control the flow based on certain conditions.

2. Synchronizing Multiple Sequencers: It seems you need to verify that the jump is activated properly. Ensure that the initial sequencer (QCS1) completes its sequence or is set to allow a transition to occur before jumping to QCS3.

3. Managing Internal Commands: WhileINTHOLDandINTSTOPare used to manage pauses and stops, jumps between sequencers might require additional configuration to ensure that the current sequence (QCS1) halts correctly before starting another (QCS3). Ensure that the conditions for ending QCS1 and starting QCS3 do not conflict.

4. Troubleshooting: If the jump is not working as expected, check:

   • The logical condition for the jump is met and active.
   • Transitions between steps in sequencers are properly defined and do not have conflicting logic.

5. Debugging Tools: Use the monitoring features of SFC to track the state and conditions in real-time and validate if the jump condition triggers correctly.

Hi,

I suggest not to use startconditions to initiate different sequencers but rather solve it how it's suppose to:

SFC works with ISA88 states like Idle, Starting, Run, Completing, Holding etc. A sequencer in run can have a Control Sequencer. For each control sequence, you can select a defined range of setpoints. Like CS: Cleaning, can have different setpoints then CS: Production. 

In order to start a CS, you need to provide a valid CS and PARAM must be set before the Start signal is given. PARAM checks all CS and setpoints before activation. If OK, QPARAM is set and it's allowed to start the SFC.

If you want to jump to different sequencers during run, normally, the SFC must be completed, aborted or stopped to initiate a new run, but you can also initiate new sequencers during run. The SFC goes through Starting and directly to the desired CS. You need to enable: ENASTART=1 if you want to do this.

The startconditions of your sequencers should be:

- QCS = 1

- SFC Run

AutoGen_3671083

Hi,

Using SFC Type, i created a binary bit memory (JUMP_QCS3) in one sequence (QCS 1 for example) and put it as start condition in the third sequencer. When this bit turns true, it will jump to QCS=3, however, i notice from the block, QCS output still remains at QCS=1 where it doesn't end the current running sequence (QCS=1) before jumping to QCS=3, is there a better way of doing this jumping? Like internal commands there's INTHOLD, INTSTOP, but what about jumping between custom sequencers?