1. Various analog input or frequency input.

  2. Triple display of process quantity, given value and control quantity.

  3. PID regulator positive and negative action selection. Manual automatic two-way undisturbed switching.

  4. In the event of blockage, couple breakage and wire breakage faults, the analog output of the control quantity and process quantity can be selected from 0%, 100% or the upper limit and lower limit.

  5. The zero point and full scale of the tracking input signal can be calibrated.

  6. Intelligent sound and light alarm, dual timer or counter function.

  7. It can perform square root and small signal removal.

  8. The valve position feedback signal can be selected arbitrarily (various analog inputs).

  9. It can realize external given value input (EM2 function).

  10. The upper limit and lower limit output control range of the control quantity can be set separately. The split-range PID control can be realized, that is, two split-range control variables are generated on the basis of maintaining the y.i control variables.

  11. Addition and subtraction can be performed on the display of measured value and set value.

  12. PID parameter self-tuning or P parameter d.u self-tuning.

  13. 8 groups of set values and P, I, D parameters are stored and recalled.

  14. The control quantity tracks the feedback quantity (EM1 function), which can realize manual/automatic two-way undisturbed removal. Internal setpoint displacement (SB function).

  15. Ratio control can be realized. Ratio control formula: given value SP=A×outside given+B (A is the ratio coefficient).

  16. 4 switch control outputs. Relocation, associated alarms, etc. can be realized.

  17. Two or three analog outputs: 0~10mA or 4~20mA.

  18. The 50HZ synchronous triac zero-crossing interpolation control algorithm realizes the optimal control of each sine wave and avoids the high-order harmonic pollution of the power grid by the high-power load. The discontinuous PID regulator has a built-in 41A triac to directly control a single-phase resistive load below 2KW AC or output 3 sets of synchronous signals that trigger a triac below 500A. (Note: should be resistive load)

  19. It can provide multi-host, single-host, and no-host RS485 asynchronous serial communication mode. Communication data verification follows the CRC-16 American data communication standard, high reliability cycle, and barcode verification.