The FBs-PLC has more than 300 instructions which adopts a user friendly and readable multi-input/multi-output function structure. With this multi-input instruction structure the user can derive many types of functionality which other brands of PLC’s may require the use of many instructions to achieve this. Also, the operation result can be directly sent to internal or external outputs for each function instruction have their own mnemonic symbol attached and the content of each operand is also displayed. For high-end applications, such as PLC networking (LINK), PID control and NC positioning etc. the FBs-PLC provides dedicated convenient instructions to assist in program development.
Via the five high-speed communication ports included in the SoC, the FBs-PLC’s communication capability is outstanding operating at a maximum speed of 921,6Kbps. Communications can be achieved using ASCII code or the double-speed binary code. Along with FATEK’s standard protocol, Modbus ASCII/RTU/TCP or user-definable protocols are also available. The FBs-PLC also provides the option of 8 different communication boards and 10 different communication modules for various types of communication applications. With their high speed and functionality, the FBs-PLC has the greatest number of communication ports than any other PLC in its class. Each communication port comes standard with LED indicators for transmission (TX) and reception (RX) to enable the user to monitor the operation.
The SoC inside the FBs-PLC incorporates four sets of hardware high-speed pulse width modulation outputs with a maximum frequency of 184,32KHz and 18,432KHz with resolutions of 1% and 0,1%, respectively. Different from the PWM function operated by software alone in other brands of PLC’s, the hardware driven high-speed PWM in the FBs-PLC provides the user with easy control with high precision and stability.
NC Position Control is incorporated into the SoC of the FBs-PLC which integrates PLC-NC control into one unit for resources sharing and reducing the need of data exchange. The NC position control adopts special positioning command language, which allows programming by mechanical or electrical units and the changing control of parameters during execution. One single unit has up to four axes outputs with a maximum frequency of 200KHz (MC) or 920KHz (MN) and equipped with multi-axis linear interpolation function. If combined with the four sets of built-in HHSC, it can achieve a fully closed loop positioning control.
The FBs-PLC includes up to 4 sets of hardware high-speed counters (HHSC) and 4 sets of software high-speed counters (SHSC). The highest counting frequency of a HHSC is 200KHz (MC) or 920KHz (MN). Each HHSC also has a clear and mask function. There are 8 counting modes including U/D, U/Dx2, P/R, P/Rx2, A/B, A/Bx2, A/Bx3, A/Bx4 which makes the HHSC very powerful and efficient. For example, if the encoder, running at 200 pulses per revolution, adopts A/Bx4 mode the FBs-PLC can achieve the same results that 800 pulses per revolution encoder can provide. The counter is implemented in the hardware so as not to occupy CPU processing time. In addition, 4 sets of software high-speed counters (SHSC) has U/S, P/R, A/B 3 types of counting modes and the total counting frequency is 5KHz.
The FBs-PLC is the only PLC in this class providing 0,1mS high-speed timers (the FBs-PLC having one 16-bit and 4 sets of 32-bit HST) Currently, the fastest time base of high-speed timers used in other brands of PLC’s is 1mS. By incorporating the interrupt function of the FBs-PLC the accuracy of 0,1mS time base high-speed timer of FBs-PLC is further enhanced and can easily achieve more precise speed detection or can be used as a frequency meter. In most cases, expensive speed detection equipment can be replaced by the economical FBs-PLC.
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