The basic performance of the programmable controller can be summarized in the following eight items:
Working speed
Working speed refers to the speed at which the CPU of the PLC executes instructions and the speed of response to the input signal that needs to be processed urgently.Working speed is the basis of PLC work.When the speed is high,it is possible to realize control by running the program,to continuously expand the control scale,and to play the various roles of PLC.
There are many PLC instructions.different PLCs.The number of instructions is also different.Dozens less,hundreds more.Different instructions have different execution times.However,various PLCs always have some basic instructions,and various PLCs have these basic instructions,so the speed is often measured by the time to execute a basic instruction.Of course,the shorter the time,the better.It has been shortened from microseconds to zero microseconds.And with the advancement of microprocessor technology,this time is still shortening.Home of the PLC
The short execution time can speed up the PLC’s response speed to general input signals.From the discussion of the working principle of PLC,from adding input signal to PLC to generating output of PLC,the ideal situation should also delay a cycle of PLC running program.Because the PLC monitors the input signal,the output generated after running the program is the response to the input signal.If it is not ideal,it is necessary to extend one more cycle.When the input signal is sent to the PLC,the input refresh of the PLC just ends,which is the case.At this time,it is necessary to wait for one more cycle before the input mapping area ofthe PLC can receive this new input signal.Although this delay is acceptable for general input signals,it is not acceptable for input signals that urgently need a response.How long the PLC can respond to the input signal that needs to be dealt with urgently is delayed,and another requirement shall be made.www.PLC100.com
In order to deal with the input signal that needs to respond urgently,PLC has various measures.Different PLC measures are not exactly the same,and the effect of improving the response speed is also different.The general practice is to use the input interrupt,and then the output is refreshed immediately,that is,after the interrupt program is running,the relevant output points are refreshed immediately instead of waiting for the entire program to run.
This effect can be measured from two aspects:one is whether it can respond quickly to several input signals;the other is how fast the fast response is.Most PLCs can respond quickly to one or more input points,with a fast response time of only a few milliseconds.High-performance,large-scale PLCs have more response points.
The working speed is related to the response speed of the PLC to the input signal,and it is the premise of whether the PLC can control the system in time.If the control is not timely,it is impossible to be accurate and reliable,especially for some systems that need to respond quickly.This is the reason for the working speed as the first indicator of PLC.
Name: Shanxi Runsheng Import & Export Co., Ltd.
Address: Room 3301, 33rd Floor, Building A, Wanda Center, No. 175 Jiefang Road, Xinghualing District, Taiyuan City
Contact: 15340683922 Wu Jiedong (same number on WeChat)
Contact QQ: 3542659095
Contact email: 3542659095@qq.com
★First-hand supply, no middlemen make the difference!
★As long as it is what you want, I can help you find it, and the price is favorable!
★According to the standard of the manufacturer of the brand, guarantee after-sales service, all products.
One-year warranty, etc.
Main business: Bentley Bentley, Invensys TRICONEX, Woodward Woodward
, Foxboro, FOXBORO, Westinghouse, Ryan, Schneider
, Modicon, ABB, AB, Motorola, GE Fanuc, Yaskawa YASKAWA, Bosch Rexroth REXROIH, ACSO, YOKOGAWA Yokogawa, Dark Horse HIMA, Emerson EMERSON
, Yokogawa YOKOGAWA, Honeywell Honeywell, Moore Moore, EPRO, ICS TRIPLEX, Bachmann and other major brands === Mainly do PLC, DCS, robot, servo and four major systems of discontinued spare parts, modules, cards, and drives.
