plc program
FX series timers for a maximum time of 3 276.7s, if you need more time, you can use the circuit shown in Figure 1. When OFF is X2, T0, and C0 is in reset State, they do not work. X2 for ON Shi, its often open touch points connected, T0 began timing, 3000s Hou 100ms … Continue reading Timed extension of FX series PLC programming
(1) BCD BCD conversion instructions (d) BCD (p) instruction ALCE number is FNC18. It is the source component of the binary number is converted into BCD codes to send to the target element, as shown in Figure 3-41.If the instructions for 16-bit operation, Executive outcomes beyond the scope of 0~9999 an error occurs when instructions … Continue reading PLC data conversion instructions BCD BIN
Data exchange instruction (d) XCH (p) number is FNC17, which is the data exchanged between the specified target component. As shown in Figure 1, when X0 is ON, and data exchanged in the D1 and D19.Figure 1 data exchange instructionUsing data exchange instruction should be noted:1) operand element desirable KnY, KnM, KnS, t, c, d, … Continue reading PLC Data exchange instruction XCH
(1) instruction MOV (d) MOV (p) order number is FNC12, which is the function of the source data to the specified destination. As shown in Figure 1, when ON is X0, then the [s.] K100 delivered to the destination of the data in the operation elements [d.] The D10. At the time of order execution, … Continue reading PLC transmit instruction MOV SMOV CMOV BMOV FMOV
Comparison instructions include CMP (compare) and ZCP (interval) b.(1) compare CMP (d) CMP (p) order number is FNC10, and the source operand [S1.] And the source operand [S2.] Compared, the comparison with target element [d.] Expressed in the State. As shown in Figure 3-33, when X1 is switched on, the constant 100 compared to the … Continue reading PLC instructions CMP ZCP
Cycle instructions there are two circular area FOR beginning instruction, number FNC08, 3 programs step instructions NEXT the end of circular, the number is FNC09, taking up 1 program step, no operands.While the program is running, is located in the FOR~NEXT the program repeated n times (determined by the operand) before continuing the implementation of … Continue reading PLC cycle instructions
Monitor the WDT timer instructions (p) number is FNC07 no operands, possession of 1 program step. WDT instruction function is to refresh the watchdog timer of the PLC.FX series PLC watchdog timer default value is 200ms (D8000 could be used to set), normal PLC scan period is less than the scheduled time. If outside interference … Continue reading PLC watchdog timer instructions WDT
Instruction FEND number main program ends FNC06, no operation, taking up 1 program step. FEND main program ends, as when performing to FEND, PLC input/output processing, watchdog timer, refresh, complete and return the start step.FEND instruction should be used note:1) subroutines and interrupts service routines should be placed after the FEND;2) subroutines and interrupts service … Continue reading PLC program instructions FEDND
Three command is associated with the interrupt: interrupt return instructions IRET, numbered FNCO3; EI interrupt enable directive, the number is FNCO4; break prohibition of DI, the number is FNC05. They have no operands, occupies 1 program step.PLC is usually in the interrupt disable State, composed of EI and DI instructions allow ranges to be interrupted. … Continue reading PLC instructions associated with the interrupt
CALL subroutine call instruction's number is FNC01. P0~P127 the operands, this instruction takes 3-program step.SRET subroutine return directive number FNC02. No operands, occupies 1 program step.As shown in Figure 1, if X0 connected, go to the label P10 to execute subroutines. When a SRET instruction is executed, it returns to the next step of the … Continue reading PLC subroutine call and return instructions
PLC ONE 