The PLC control system design of the early, first of all, should according to the system input and output signal properties and points, and the function of the control system requirements, determine the hardware configuration of the system, such as types of CPU module and power module and need to which input / output module … Continue reading STEP 7 hardware configuration task
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STEP 7 hardware configuration tool HW Config
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 ladder diagram input signal conditioning 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
Omron PLC and Siemens touch screen Communication setting method
OMRON PLC can not communicate with TP177B / DP touch screen, But TP177A / DP and other communication with the screen (have repeatedly tested)Specific settings Communication Notes:(1) All communication settings (HMI and PLC) must be consistent (station number, baud rate, parity, etc., Use the default values here namely: "9600,7, Even / even, 2");(2) CPU-42H 4 feet should … Continue reading Omron PLC and Siemens touch screen Communication setting method
Omron PLC technical problems and solutions
A, normally-off mark What does this mean? Under what circumstances can use normally-off signs, normally-off flag at what time it is turned on?(Normally open) Under what circumstances will the conductor, generally not allowed to handle the case 1.P_OFF bit set to ONFor example, CNT command, if a customer is not allowed in any case reset, … Continue reading Omron PLC technical problems and solutions
Siemens S7 PLC address register load and transmission
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
PLC Siemens S7 series into time or count values
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
PLC Siemens S7 series loading and transfer instructions
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
STEP7-Mirco/WIN software project management
1 print (1.) printing method of program and project documentsPrint program and project documents in the following way:Click the "print" button.Select the menu command "file" then "print".Press the CTRL + p shortcut key combination.(2). network and print a single itemFollowing a single block printed a series of network, or from a single symbol table or figure … Continue reading STEP7-Mirco/WIN software project management
Siemens S7-200 PLC high-speed counter instruction Initialization
High speed counter instruction is initialized as follows:(1) first scans through a special internal memory scanning cycle SM0.1 to call a subroutine to complete initialization. Because the use of subroutines, in subsequent scans, no need to call this subroutine, to reduce the scanning time, make the program better.(2) in initial of of child program in … Continue reading Siemens S7-200 PLC high-speed counter instruction Initialization
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