PLC = Programmable, Logic, Controller, programmable logic controller, an electronic system for digital operation, designed for use in industrial environments. It uses a programmable memory, used in its internal storage procedures to perform the logic operation, sequence control, timing, counting and arithmetic operations such as user oriented instructions, and through digital or analog input / … Continue reading What is PLC?
Category: plc program
LE3U PLC AB phase encorder
6RA70 equipment, in the direction of the times police F030!
A company 6RA70 equipment, in the direction of the times police F030!Problem supplement:My equipment is reversible rolling mill, each time the alarm F030 is the time to change, and sometimes just change the alarm, and sometimes to go for a while and then alarm, alarm reset after the normal work!Best answerFault F030:Detection of current loop … Continue reading 6RA70 equipment, in the direction of the times police F030!
Damage cause of s7300 analog input module
S7300 analog input module (331-7KB02-0AB0 6ES7) 3 years of bad 2, the input signal 4-20mA, consult the module is easy to damage the reason?Best answerReference: analog quantity module damageHttp://www.ad.siemens.com.cn/service/answer/solution.aspx? Q_ID=63278&cid=1029?
MRES switch problem
MRES switch how the operation will clear the data and procedures PLC400.Best answer1 memory card inserted in the bottom of the CPU. CPU requires the machine to reset (LED STOP lamp slowly flashing).2 switch the switch to MRES and keep it there (about 9 seconds) until the LED STOP light continues to shine.3 in the … Continue reading MRES switch problem
WINCC no landing window
This is based on the WINCC PCS7 landing, the installation of the CEMAT version number is 7.1SP1, the selection of the 007 library. Before the project is a good, normal use. For some reason, today I will reinstall the computer system, in accordance with the step, CEMAT also re installed, but when the project is … Continue reading WINCC no landing window
S7-400PLC program lost
The S7-400PLC program under what conditions will be lost, if the PLC power supply and power supply immediately, will not have lost PLC program.Best answer1, if the PLC power supply, power supply immediately, will cause the PLC program is lost?If there is no backup battery or flash memory card (prior backup), will cause the loss … Continue reading S7-400PLC program lost
PLC STOP switch problem
Can not use the program or other settings to prohibit the use of ST0P outside the S7-400PLC or MRES switches.Best answerCan not. This can only be considered from the system or external equipment, such as:1, the development of relevant operating system2, to the PLC cabinet lock
WINCC status display problem
Through the 400PLC control of a WINCC status display, but in WICC do not see the connection variables of him and PLC, is indeed WICC internal variables seen in WICC, this is what he shows the status of the PLC through what way, is not through C script or VB script to achieve, how should … Continue reading WINCC status display problem
SIEMENS PID parameter settings why the same procedure as the PID parameters, but the output value of the change is not the same
The master station set up a PID control valve is P=5 I =5 D=0 control is stable, can be output to the maximum and minimum values, but also I have a program through my 200 and Mudbus communications, from the station of PID is the same as the PID parameter value is written from the … Continue reading SIEMENS PID parameter settings why the same procedure as the PID parameters, but the output value of the change is not the same
PLC ONE 