All About Automation and Control System

The MOV instruction is also used to save the hexadecimal representation of the Baud Rate, Data Bits, Parity, Stop Bit, and Comm. Protocol parameters in the D8120 register, which is stored in Hexadecimal Number. The binary format 0100 0000 1000 0001 is equivalent to the Hexadecimal number , where each bit denotes a distinct communication configuration. So, how do we use it? For example, let's assume that our desired communication setting is : Data Length         : 7 bit  Parity                    : None Stop Bit                : 1 bit Baud Rate            : 9600 bps Comm. Protocol  : Modbus Slave Slave ID               : 1 Therefore, Our Binary Code will be 0100 0000 1000 0001. Remember! This Binary Code B0 to B15 is from Least Significant Bit to Most Significa...

As seen in the accompanying image, the voltage output of a 4–20 mA transmitter can be transformed to a specific range, from 0 to a maximal amplitude Vmax: I [mA] = ( ( (V − Vmin) / ( Vmax − Vmin) ) × 16 ) + 4 (Voltage to Current) V [Voltage] = ( (I − 4 ) / 16) × ( Vmax − Vmin ) + Vmin (Current to Voltage) PV [units] = ( (I − 4 ) / 16) × ( PVmax − PVmin ) + PVmin (Current to Process Variable) Where, I is the current. V is the voltage. PV is the Process Variable. min is the Lower Range Value of the respective signal. max is the Upper Range Value of the respective signal. Keep in mind that the min and max values and units must match. For Voltage to Current, As an illustration, The output voltage of an analog output card is 3V, and its total range is 0–6V. Determine the corresponding 4–20 mA current value. I = ( ( (V − Vmin) / ( Vmax − Vmin) ) × 16 ) + 4 I = ( ( (3 − 0) / ( 6 − 0) ) × 16 ) + 4 I = 12A Reference : Instrumentationtools

A PLC's datasheet contains a wealth of information that covers nearly every feature the PLC is capable of offering. The technical specifications of the PLC, such as the supply voltage, input and output types, and power rating of these IO points, will be your main concern if you are the installation engineer. The historical data may not be as important to you if you are only a PLC programmer. Instead, you will concentrate on information about the PLC memory, the amount of IO available, and the ability to add new modules. The following details in the PLC data sheet must be examined, depending on the different manufacturers: - PLC Memory  - Current and Voltage Rating  - Addressing Various Blocks and Data Areas - Specifications for Inputs and Outputs - Interfaces and Protocols for Communication - The Ambient Situation Different PLCs will have different features and capabilities, hence different information will be displayed on different PLC data sheets. Depending on whether you ar...

Safety PLC means Safety Programmable Logic Controller. Their functions are similar with traditional PLC. But the different is that it has additional built in features that set them apart. They are built with redundancy to prevent the failure in the system. While standard and safety PLCs have similar appearances and functions, safety PLCs include additional redundancy and safety-specific capabilities, which are typically denoted by a bright color (yellow or red). The image was provided by Rockwell Automation. Not all control systems are impossible to avoid malfunction and device failure, so it is very important in some large processes or systems. Security In the event of a failure, PLCs' predicted failure modes lessen the degree of system disturbance. It is possible to reduce wiring complexity, time, labor expenses, and wire cabinet area by substituting safety PLCs for safety relays. A safety PLC also makes future system improvements simpler and less costly because, i...