Longer Precision Pump Co., Ltd provides high-accuracy peristaltic pumps for laboratories and industrials around the world.
Their peristaltic pumps can be controlled remotely from a computer which can give you more flexibility and convenience, especially if you want to run complex pumping programs with loops, pauses, and varying flow rates.
The communication control is based on the Longer RS485 protocol, which is a serial communication protocol that allows you to send commands and receive responses from the pump.
While writing a control command string for the pump, one needs to compute the frame check sequence (fcs) which is obtained by calculating the XOR of the pump address, the length of the pdu (protocol data units) and the pdu itslef. The frame check sequence XOR calculator below can be therefore a useful tool for your fcs calculation.
