I. OverviewUsually large wave soldering machines, production lines, but some customers such as laboratories, schools, small factories need a small lead-free wave soldering machine. Certain electronic equipment factory developed this product, using the Austrian letter OYES series PLC and touch screen. The device requires three temperature control, a total of three PID, the Austrian letter … Continue reading OYES PLC applied using a small wave soldering machine design
Author: arcozhang
How to read the S7-1500 CPU running time
Read S7-1500 CPU running time There are many ways, are described below in several ways.1 reads out the running time by the startup parameters OB1 OB1 start in non-optimized run-time information with the OB1The startup information passed to the global variable parameters can be read out of the CPU the last scan, minimum, maximum scan … Continue reading How to read the S7-1500 CPU running time
Through the program determines the touch screen and plc communication failure method
The usual method is to use heartbeat, defined a bool, HMI fixed point set the frequency, PLC receives the point after ON signal is reset. If a period of time, for example, do not receive the points for the ON signal within 5s, it is considered Tongxu interrupted.plc to the memory clock of bytes transmitted … Continue reading Through the program determines the touch screen and plc communication failure method
Delay ON / OFF circuit
Delay ON / OFF circuit
Flashing circuit
Flashing circuit
Three-phase asynchronous motor reversing control circuit
Three-phase asynchronous motor reversing control circuit
sample PLC circuit diagram
PLC circuit diagram
PLC control inverter circuit diagram
PLC control inverter circuit diagram
PLC conduction delay timer instruction (TON)
When the limit switch 1 is set, the indicator 2 ON 180ms (timer clocked). When the accumulated value of the timer 1 (.ACC) reaches 180, 2 lights off, the indicator 3 is turned on, and remains on until the TON instruction is disabled. If you disconnect the timer is timing the limit switch 1, then … Continue reading PLC conduction delay timer instruction (TON)
PLC program sequential logic design method
(1) overview Sequential logic design method is suitable for the output signals of the status change of the PLC has some chronological situation, when in programming according to draw sequence diagram of the output signal, streamlining the state transitions and transition conditions, examine the output and input and internal contacts and the relationship, and make the … Continue reading PLC program sequential logic design method
PLC ONE 