plc program
Siemens plc S7-300 programming the timer can also be a pulse generator. (1) Control RequirementsThe PLC program using a timer constitute a pulse generator,With two timers generate a pulse signal frequency of the duty cycle can be set Timing diagram of the pulse generator(2) Ladder DiagramPLC Ladder DiagramWhen the input I0.0 is 1, the … Continue reading Siemens PLC S7-300 Ladder Diagram Programming Example-pulse generator
Select the SIMATIC manager on the left side of the station, double-click the right window of the "hardware" icon, open the hardware configuration tool HW Config (1) hardware directoryYou can use the menu command to "view", "directory" or the button on the toolbar to open or close the hardware directory window on the right. Select … Continue reading STEP 7 hardware configuration tool HW Config
PLC programming often need to use different commands to obtain different information on the switchthis is plc programming examples1. Get information on the rising edgeTo obtain information on the rising edge of the input signal by the transition instruction, contacts and trigger rising edge pulse2. Get information falling edgeTo obtain information on falling edge the input … Continue reading how to get a signal PLC ladder program
whatever the input signal X20 High level havs Any time,They are generating a pulse signal width， It can be the input signal sorting program, which was to became unified pulse signal,you can see the PLC ladder diagram programming
When any one of IR00004 and IR00005 is "ON", HR0000 will be set to "OFF".
① set and reset. When the condition becomes "ON", the set will be put in operation "ON", but not as output (OUT), when the condition becomes "OFF", the reset will not reset on the operation of "OFF". When the condition becomes "ON", the reduction in operation position reset "OFF", but does not output non-directive … Continue reading PLC ladder programming Instruction control bits
Three conveyor belts, respectively, by the motor M1, M2, M3 driven.Requirements: After pressing the start button SB1, a startup sequence for M1, M2, M3, interval of 3s.After the stop button SB2, Sequential stopping for M3, M2, M1, interval of 3s.Three motors M1, M2, M3, respectively, through the contactor KM1, KM2, KM3 three-phase AC power supply … Continue reading Siemens S7-200 PLC’s Belt conveyor Control Programming Example
When I0.0 changes from 0 to 1, T102 normally closed contact closure, T101 is started and start time: When the T101 SV reaches the set PT (50 × 100ms = 5s), T101 is turned on, T101 normally open contact closure, T102 is started, the start time; When the T102 current value of SV reaches its … Continue reading Siemens S7-200 PLC Duty Cycle Adjustable of the pulse source Programming Example
An electrical start of the conveyor belt, At the beginning of the conveyor belt has two push button switches: S1 for START and a STOP of the S2.At the end of the conveyor belt also has two buttons switches: the S3 for START and STOP for the S4. You can start or stop the belt … Continue reading Siemens S7-300 plc’s Controls Belt Programming Example
Timer may constitute a pulse generator with two timers generate a pulse duty cycle of the signal frequency can be set. When the input I0.0 is 1, Output Q0.0 is 0 or 1 alternatelyPeriodic pulse signal for 3s, the pulse width is 1s.
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