According to the following ladder diagram programs write statements that correspond to table program
PLC ladder diagram programs statement that corresponds to the table program
Category: plc program
Normally closed contact Input signal Processing circuit and PLC ladder diagram
In these input signals can only be provided by a normally closed contact, Figure 1a is to control the motor run relay circuit, SB1 and SB2 start button and stop button, respectively, if they are normally open contacts connected to PLC input, type contacts in the ladder diagram with exactly the same figure 1a. If … Continue reading Normally closed contact Input signal Processing circuit and PLC ladder diagram
Pulse output (PLS/PLF) instructions
PLS (pulse) rising differential outputPLF (pulse) down along the differential output
PLC Timer Three basic usage
Basic usage of timers(1) TCDescription: X0 after 2s, Y0(2) loss delay faultFigure 3 power failure delays broken ladder diagram and sequence diagramNote: when X0 is ON, the normally open contact closure, Y0 connected and self-preservation; when X0 is off, the timer start time delay when X0 when time reaches the time timer setting is removed, … Continue reading PLC Timer Three basic usage
FX2 series PLC stepping sequential control instruction
FX series PLC 2 step instructions there are two: stepping contact instructions step and STL RET return instructions.1, STL: stepping contact instructions Ladder diagram symbolsSignificance of STL instructions to activate a State. Reflected in the ladder diagram from the bus status led on points. STL function of instruction established a bus, so that the State … Continue reading FX2 series PLC stepping sequential control instruction
PLC differential circuit
Rise differential differential circuit and the falling edge of differential pulse circuit, discussed below.Rose along differential pulse circuit, PLC is to cycle scan way work of, in PLC first times scan Shi, entered X0 by OFF into ON Shi, M100, and M101 coil connected, but in first line of M101 of often open touch points … Continue reading PLC differential circuit
Using PLC to realize any of the input signal frequency
Using PLC to realize any of the input signal frequencyFrequency pulse signal applied on the X0 side, in the first pulse arrives, a scanning cycle pulse M100, M100 normally open camp, closed a scanning cycle. Determine the condition that Y0 Y0 State set to 0, M100 set to 1.Y0 in the conditions of work in … Continue reading Using PLC to realize any of the input signal frequency
PLC Timer delay time extension
Timer has a maximum time of the time, such as 100ms timer maximum timer time is 32767.7s. As in the project delay time is greater than the value that you want to do, one of the most simple method is to use a timer relay, that is to start a timer time, time time to … Continue reading PLC Timer delay time extension
PLC programming elements timer
Timer is equivalent to relay time relay in the circuit may delay control in your program. FX2 series programmable controller has the following four types of timer.100ms timer: T0~T199 200 timing ranges: 0.1~3276.7 sT200~T245 46 10ms timer timing range: 0.01~327.67 s1ms totalizer timers T246~T249 4 (interrupt) time range 0.001~32.767 s100ms totalizer timer T250~T255 6 timer … Continue reading PLC programming elements timer
PLC selection of simple capacity
PLC including I/O points and user storage capacity the capacity of two aspects.(A) Selection of I/O pointsPLC I/O points average prices are still relatively high, so the number of reasonable selection of PLC I/O points, to meet control requirements and strive to use the minimum number of I/O points, but you must have a certain … Continue reading PLC selection of simple capacity
PLC ONE 