Watlow Series F4P Temperature/Process Controller

2. Set the internal loop PID: "P á gina Operaiones>Autoafinar PID" Select "Lazo interno cassad"

3. Set the PID of the external circuit: select "Lazo externo cassad", and the set point of the internal circuit dynamically changes with the deviation of the external circuit, such as industrial furnaces (external circuit: furnace temperature; internal circuit: heating tube temperature), refrigeration systems (external circuit: cabin temperature; internal circuit: evaporator temperature), etc

Proportional control (Relaci ó n) process value and reference value are linked proportionally: output set point=reference value x proportional coefficient, supports 4 sets of digital trigger proportional switching. 1. Configure reference input: "P á gina Configuraci ó n>Entrada anal ó gica 3" set to "Relaci ó n"

2. Set the proportional coefficient: "P á gina Operaiones>PE de control" configure "P.E. Digital de relaxi ó n"

3. Associated trigger signals: digital input triggers ratio switching (such as different product formulas corresponding to different ratios), mixing process (such as mixing two materials in proportion), synchronous control (such as multi axis speed ratio adjustment)

The valve positioning control (Posici ó n de v á lvula) feeds back the valve position through the potentiometer, controls the valve switch with dual outputs, supports dead zone and lag adjustment, and avoids frequent actions. 1. Configuration input 3: "P á gina Configuraci ó n>Entrada anal ó gica 3" is set to "Posici ó n de v á lvula", and calibrates the potentiometer range (100-1200 Ω)

2. Set dead zone: "Bandamuerta (res.cur)" (0.3-100%) to avoid triggering actions with small deviations

3. Configuration output: 1A control valve closed, 1B control valve open, based on PID deviation adjustment action time fluid flow control (such as three-way valve), gas mixing ratio adjustment

Ramp control (Rampa) set point changes at a fixed rate: linearly rising from the current value to the target value to avoid process fluctuations caused by rapid changes. 1. Configuration mode: "P á gina Operaiones>Rampa x a Punto establecido" set to "Proceso" or "Punto establecido"

2. Set parameters: "Velocidad de rampa" (1-999 units/minute/hour), "Escala de rampa" (units)

3. Trigger start: Trigger ramp heating/cooling process (such as semiconductor annealing, glass forming) from "P á gina Principal" or digital input to avoid thermal shock

(3) PID automatic tuning and multiple sets of PID

Autoafinaci ó n: Through 4 oscillation tests across the set point, the optimal PID parameters are automatically calculated, supporting local (internal loop) or global tuning. During the tuning process, the controller switches to switch control and automatically restores PID control after completion. You need to select "Conjuno PID" (storage group) and "Tipo Autoafinac. PID" (heating/heating+cooling only) in "P á gina Operaiones>Autoafinar PID", and pay attention to choosing a safe setting point (to avoid overheating and damaging the product).

Multiple sets of PID storage: Supports 5 sets of PID parameters (Conjunto 1-5), which can be triggered to switch based on set points or process values (such as Conjunto 1 for low temperature section and Conjunto 2 for high temperature section). The switching point can be configured with "Hist é resis" (-1 unit) to avoid frequent switching, and the switching condition can be set in "P á gina Operaiones>Cambio de PID".

3. Alarm and safety functions (fault protection)

(1) Alarm type and configuration

Support process alarm, deviation alarm, and rate alarm, with 2 independent alarm outputs that can be associated with different fault scenarios:

Key parameter configuration points for triggering logic of alarm types

Process alarm (Proceso): Process value exceeds fixed threshold: above "P.E. alto de alarma" or below "P.E. bajo de alarma" triggers - P.E. alto/bajo de alarma: threshold must be within sensor range and above/below set point

-Hist é resis de alarma: 1-9999 units, to avoid frequent alarm triggering. Set the threshold in "P á gina Operaiones>Punto establecido de alarma" and set "Lados de alarma" (high/low only/dual end) in "P á gina Configuraci ó n>Salida de alarma x"

Deviation alarm (Desviaci ó n): The deviation between the process value and the set point exceeds the threshold: Deviation=Process value - Set point. If it is higher than "Desv. alta" or lower than "Desv. baja", it triggers - Desv. alta/baja: 1-9999 units (can be negative), and the deviation threshold dynamically changes with the set point

-The threshold for scenarios with frequent changes in the set point should be set in "P á gina Operaiones", and the alarm range should be adjusted synchronously with the set point (such as when the set point is raised from 100 ℃ to 200 ℃, the deviation threshold should be maintained at ± 5 ℃)