plc program
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
CJ conditional jump instructions (p) numbered FNC00, label P0~P127 operand is pointer, P63 to END sequence, without tags. B line label is allowed to modify the pointer. Step 3 procedures for CJ and CJP, pointer grade 1 step.As shown in Figure 3-28, when X20 is switched on, then jumps to the label by CJ P9 … Continue reading CJ conditional jump instructions (p) number is FNC00
1. Components and componentsLike x, y, m and s only ON/OFF information, such as software components known as components like t, c, d and other numerical software components is called a word element, a word element composed of 16-bit binary number.Components can be used in combination, 4-bit components as one unit, general representation is soft … Continue reading Mitsubishi FX series PLC functional instruction data format
1. continuous and pulse the implementationFunction instruction are continuous and pulse implementation of the two types. As Figure 1 by shows, instruction help remember breaks MOV behind has "p" said pulse implementation, that the instruction only in X1 connected (by OFF to ON) Shi implementation (will D10 in the of data sent to D12 in … Continue reading Mitsubishi FX series PLC function instruction execution and data length
Command formatCommand format is different from basic instructions. Function instruction with number FNC00~FNC294, and give the corresponding mnemonics (mostly with English names or abbreviations). For example FNC45 mnemonic is MEAN (average), if using a simple programmer type FNC45, using the intelligent programming or program on your computer you can also type the mnemonic MEAN.Function instruction … Continue reading Mitsubishi FX series PLC functional instruction format
PLC ONE 