plc program
Bytes read instruction immediately (MOV-BIR) reads the actual input IN the 1-byte values, and write OUT the result as the specified storage unit, but the input image register has not been updated.Bytes write command immediately read from the input IN the specified storage unit 1 byte numerical and written (in bytes) of physical output point … Continue reading Siemens PLC byte immediately read instruction MOV-BIR
Byte switch command is used to switch the input word IN the highest and lowest bytes ENO = 0 error condition:0006 (indirect addressing error),SM4.3 (run-time)Results of the program:Before instruction execution VW50 the word: D6 C3After the instruction execution VW50 word: C3 D6
FBDTerminal Description: EN--allows inputsIN--source data inputPurpose OUT--output operandsENO--allows the output side Statement List: A I 0.0 JNB _0001 L MW 10 T DBW 12 SET // make RLO 1 SAVE // make BR 1 CLR _0001: A BR = Q 4.0
Format: LAR1Note: the load address of the operand register 1 (ARl);Format: LAR2Note: the load address of the operand register 2 (AR2);Format: TAR1Description: pass the contents of the ARl to store or AR2;Format: TAR2Description: pass the contents of the ARl to store or AR2;Format: CARDescription: swaps the contents of ARl and AR2 LARl P#I0.0 //input I0.0 … Continue reading Siemens S7 PLC address register load and transmission
Characters in the remaining time of the timer value is saved in the binary format, l instruction read binary in the timers time value into accumulator 1, known as direct mount. LC instructions to DCD format can also be used to read out time value, loaded in accumulator 1 low, called BCD code formats read … Continue reading PLC Siemens S7 series into time or count values
Mount (l) and transmission (t) command will store or store and Exchange data between process input and output. L directives in the source operand load accumulator •, existing data into the accumulator and accumulator 2, accumulator 2 existing content is overwritten. T command writes the contents of the accumulator 1 purpose store, contents of the … Continue reading PLC Siemens S7 series loading and transfer instructions
Terminal Description:CU - count inputCD - minus counting inputS - preset inputPV - setting the initial countR - Reset inputQ - counter status outputCV - current output count value (hexadecimal format)BCD-- output current count value (BCD format)FBD A I 0.0CU C 10 A I 0.1CD C 10 A I 0.2S C 10 L C#55 … Continue reading PLC Siemens S7 series counter
A I 0.0 L S5T#2s SE T5 A I 0.1 R T 5 A T 5 = Q 4.0 FBD
A I 2.0 FR T1 A I 2.1 L S5T#10s SP T1 A I 2.2 R T1 A T1 = Q4.0
FBDLADA I 1.0 A I 1.1 NOT A( A I 1.2 A I 1.3 NOT O I 1.4 ) = Q 4.0
PLC ONE 