PLC ladder diagram programs limited the maximum operating frequency of the counter by the scanning cycle, generally only dozens of Hz. In industrial control, sometimes requires fast PLC counting function, pulse count may come from rotary encoders, mechanical switches or electronic switch. High speed counting modules for dozens of even hundreds kHz Hz pulse count, … Continue reading Mitsubishi PLC high-speed counter module FX2N-1HC
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FX2N series PLC input/output relay introduction
FX series PLC ladder diagram programming elements names letters and digits, they represent the type of component and the component number, such as Y10,M129. Input relay output relay element, represented by the octal number, octal number only 0~7 the 8 digit symbol, follow the "every 8 into 1" operation. For example, octal, X17 and X20 … Continue reading FX2N series PLC input/output relay introduction
FX2Nc series PLC performance profile (basic unit, extension)
FX2NC has very high performance volume and communication capabilities, can be installed to a PLC in a much smaller space than standard. I/O connectors wiring costs can be reduced, saving connection time. I/O point numbers can be extended to 256, optional real-time clock, can connect up to 4 specific modules. Take advantage of built-in features, … Continue reading FX2Nc series PLC performance profile (basic unit, extension)
FX series PLC user environments, and data structure
It consists of user data, user components distribution, storage, file storage, user parameters by the user program area.1. User data structureUser data structure is divided into three main categories:First class is a bit of data. Second class is character data. Third class for words mixed with bit2. Logic elements(1) enter relay (X0 ~ X177) PLC … Continue reading FX series PLC user environments, and data structure
Mitsubishi PLC ladder diagram and the SFC by for example
When you use a step ladder instruction programming, first to design a State transition diagram based on State transition diagrams into a step ladder or instruction sheet. These three types of representation is shown in Figure 5-2. Action process when stepping contact S20 is closed, Y1 coil output relays switched on. When closing X0 a … Continue reading Mitsubishi PLC ladder diagram and the SFC by for example
Mitsubishi PLC ladder step instructions [STL],[RET]
Step instructions (STL) is the use of internal software components, processes stepping sequence control program control instructions. Step return instructions (RET) refers to the condition (s) process is finished, to return to the main program (bus) instructions.Attention when stepping instructions1. Stepper point is only normally open contact, instead of normally closed contacts, said the instructions … Continue reading Mitsubishi PLC ladder step instructions [STL],[RET]
Mitsubishi FX series PLC constants (k, h)
State relay (s) within the PLC "soft relay", and enter a relay (x) and the output relay (Y), there are countless on the normally open and normally closed contacts, if not step into the soft components can be used as General auxiliary relay (m). Total state relays within the FX series 1000, S0~S9 are mainly … Continue reading Mitsubishi FX series PLC constants (k, h)
The three ways of realization of communication between PLC and PC Internet
Numerous suppliers of various types of PLC, each of them has advantages and disadvantages, to meet user needs, but in terms of morphology, composition, functions, and programming varies, no uniform standards, the manufacturers to develop communication protocols also vary. At present, the following three main ways of communication between PLC and PC connectivity:1) by using … Continue reading The three ways of realization of communication between PLC and PC Internet
PLC timer (t)
Of timer in PLC equivalent to relays time relays in the system.It has a set value registers (one word), a current values of registers (one word) and an image uses to store its output contact status register (binary bit), these three storage units using the same component number. FX series PLC timers are divided into … Continue reading PLC timer (t)
Mitsubishi FX series PLC analog control functional unit
A, analog input/output modules1.F2-6A input characteristicThe output characteristics of 2.F2-6ASetting and adjustment of 3.F2-6A(1) input type selectionInput type selection (0~5) v, (0~10) and v (0~20) when mA, each channel selection. If a channel selection (4~20), mA, then all of your channel needs to be set to (4~20) mA.(2) set the output typeSet the output type … Continue reading Mitsubishi FX series PLC analog control functional unit
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