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The operating principle of the paper tube machine under different control systems will also be different from different perspectives, as follows:
From the working mode of the paper tube machine, there are two working modes.
1. In the relay control circuit, when the power is turned on, all relays in the circuit are in a restricted state, that is, the relays that should be attracted are attracted at the same time, and the relays that should not be attracted cannot be attracted due to certain conditions. This is a parallel working mode.
2. The serial working mode refers to the use of PLC for control, and its user program is executed in a certain order, so each soft relay is in a periodic cycle scan connection, and the action order of each relay subject to the same condition is determined by the program scanning order.
From the control method of the paper tube machine, the control logic of the two control systems is different.
1. The control logic of the relay control system adopts hardware wiring, and the control logic is composed of the series or parallel connection of the mechanical contacts of the relay.
2. When using PLC, the control logic is stored in the memory in the form of a program. It uses computer technology. To change the control logic, you only need to change the program, so it is easy to change or add system functions.
