Those who are familiar with Zhejiang University Zhongkong JX300XP, please explain!
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Figure 1 shows the stop procedure, while Figure 2 shows the pin annotations. According to the procedure, when the intermediate variable for stopping is set to ON, it is necessary to perform a logical operation with the output of the RS flip-flop in order to generate the stop signal. The problem is that I don’t understand that RS flip-flop. Since the intermediate variable for the stop signal is already set to ON, according to the procedure, either the stop feedback PF or the reset signal SA must be set to ON for the stop signal to be generated properly But since there is no stop signal generated, how can there be a stop feedback? There is no reset button either, nor any reset signal; when everything is set to OFF, the RS flip-flop outputs ON, and after inversion it becomes OFF. When this value is combined logically with the stop intermediate variable, which is also ON, the output remains OFF. So the vehicle still cannot stop. What kind of logic is this? Some kind sir, please explain it to me; I would be extremely grateful!
Those two repeated diagrams are just annotations; the remaining two diagrams represent the module logic and the module annotation logic. I spent the whole morning trying to figure out why that is the logic of the program, but I still didn’t understand it
Setting SFS to 01 is fine; there is no alarm for a lack of stop feedback within 3 seconds, so everything is okay
But I see that the stop feedback is also involved in the output of the stop signal! Mainly, I don’t quite understand why, after sending the stop feedback and reset signals to the RS flip-flop, they still need to be combined with the stop intermediate variable using an AND operation? What state of the stop feedback and reset signals is required to bring the machine to a stop?
What is the purpose of that inverting input right after the Rs flip-flop?
After a failure, an operation is selected to determine whether to trigger an alarm; inverting this setting is required in order to stop the machine when an alarm is triggered as a result of a failure
Stop feedback, do not participate in output PF
But in the program, isn’t the output after the RS flip-flop also connected to the AND gate? Could you add me on WeChat, brother?
I think I understand a bit; it’s like hitting a dead end. Thank you
Under normal circumstances, when parking in series and before the parking signal is sent, PF is OFF, SA is also OFF, and SFS is not taken into consideration; therefore, when the S1 pin of the RS flip-flop is ON, the output is ON. Is there anything wrong with this? After inversion, it becomes OFF. When this is ANDed with a stop intermediate variable that is ON, the output remains OFF – so how is it possible to stop in this case?