Watlow Series F4P Temperature/Process Controller

(2) Panel button function

Example of Key Function Operation

Up/Down: Move the cursor, increase or decrease values, switch display items to adjust the set point: Select "P.E. 1" on the homepage, press Up to increase, Down to decrease

Left/Right: Switch menu, confirm selection, exit current page, confirm alarm reset: Select alarm message, press Right to confirm reset

Auto/Manual Switch Control Mode: Auto (Closed loop)/Manual (Open loop) Manual Adjust Output: Press the Auto/Manual key, confirm and use Up/Down to adjust the output power

Informaci ó n displays parameter definitions and operation prompts. View the definition of "Banda propositional": select the parameter and press the information key to display instructions

2. Core configuration process (taking single loop temperature control as an example)

(1) Basic Configuration (Required Steps)

System parameter configuration (P á gina Configuraci ó n>Sistema)

Unit setting: "Unidades PID" is set to "SI" (℃/minute) or "Inglesas" (℉/time/minute), and "° F o ° C" is set to the required unit for the process (such as ℃).

Power failure: Set "Modo de falla" to "Apagado" (turn off output in case of failure), and set "Deterci ó n de lazo abierto" to "Encendido" (enable open circuit detection).

Filter setting: Set "Tiempo de filtrado" to 1-5 seconds (to reduce signal noise and avoid frequent adjustments).

Input configuration (P á gina Configuraci ó n>Entrada anal ó gica 1)

Sensor type: "Sensor" is set to the actual usage type (such as "J" type thermocouple), and "Tipo" is set to the corresponding curve (such as "J").

Range setting: "Escala baja/alta" is set to the sensor range (such as 0-750 ℃ for J-type thermocouples), and "L í mite bajo/alto P.E." is set to the process allowable set point range (such as 50-500 ℃).

Compensation setting: Set "Tipo de compensaci ó n" to "Linear sencillo" (single point compensation). If there is a deviation in the sensor, enter the compensation value (such as+1 ℃) in "Valor de compensaci ó n de la calibraci ó n".

Output configuration (P á gina Configuraci ó n>Salida control 1A/1B)

1A output (heating): Set "Funci ó n" to "Calor" (heating), "Tipo del tiempo del ciclo" to "Disparo variable" (variable period), and "Valor del tiempo de ciclo" to 1-10 seconds (adjusted according to load to avoid contactor wear).

1B output (optional, cooling): If cooling is required, set "Funci ó n" to "Fr í o" (cooling), with the same parameters as 1A; if not required, set "Apagado".

Process output (optional): If temperature signal needs to be resent, set "Proceso" to "4-20mA" and "Escala baja/alta" to 0-500 ℃ corresponding to 4-20mA.

Alarm configuration (P á gina Configuraci ó n>Salida de alarma 1/2)

Alarm 1 (Overtemperature): Set "Tipo de alarma" to "Proceso", "Lados de alarma" to "Alto", "Enganche" to "Autoborrado" (automatically reset after fault relief), and "Hist é resis alarma" to 5 ℃.

Alarm 2 (low temperature): "Tipo de alarma" is set to "Proceso", "Lados de alarma" is set to "Bajo", and all others are the same as alarm 1.

(2) PID tuning and optimization (ensuring control accuracy)

Automatic tuning (P á gina Operaiones>Autoafinar PID)

Select tuning object: "Conjuno PID can. 1" is set to 1 (storage group 1), "Tipo auto afinac. PID" is set to "Calentar y exhaust" (if cooling is available) or "Ur nicamente calentar".

Start tuning: Confirm the safety of the set point (such as 90% of the process temperature), press Right to start, and the controller will automatically store PID parameters after completing 4 oscillations.

Verification result: After the setting is completed, observe whether the process value is stable within ± 1 ℃ of the set point. If the overshoot is large, the differentiation time can be manually reduced; If the fluctuation is large, increase the proportion band.

Manual optimization (when the automatic tuning effect is poor)

Proportional band: If the process value fluctuates greatly, increase the "Banda proportional" (such as changing from 10 ℃ to 15 ℃); If the response is slow, reduce the proportional band.

Integral time: If there is a static deviation (such as a set point of 100 ℃ and a stable temperature of 98 ℃), reduce the "Integral" (such as changing from 5 minutes to 3 minutes); If there is oscillation, increase the integration time.

Differential time: If the overshoot is large (such as set point 100 ℃, peak 105 ℃), increase "Deriviva" (such as changing from 0.5 minutes to 1 minute); If the response is slow, reduce the differential time.

(3) Advanced configuration (choose as needed)

Cascade control: It is necessary to first configure the input of the internal circuit (heat source temperature) (such as connecting input 3 to the heat source sensor), set "Cascada" in "P á gina Configuraci ó n>Entrada anal ó gica 3", tune the PID of the internal circuit, and then tune the external circuit.