Temperature Control

The TB_TCtrl_PIDT1 function module is a PIDT1 controller that is primarily geared toward temperature regulation of thermally-sluggish systems. The controller can be used as a PIDT1 controller or a P, PI, PD or PDT1 controller. Combinations of controller types are also possible, e.g. for command PD and disturbance PIDT1, which means it can be used for almost any conceivable control distances.

The controller can be used as a PIDT1 controller or a PI, PD or PDT1 controller. When x_Enable = TRUE, the module is activated. Successful activation is signaled with TRUE at the x_Active output. From this point, the controller is active and calculates the output sizes. When x_Enable = FALSE, all output sizes are set to 0.

The controller works with four data records for command (cooling and heating) and disturbance (cooling and heating). Different parameters are required for heating and cooling since oftentimes only active heating is carried out, and not active cooling. The switching between command and disturbance is determined with u_Thresh_RD. If the same parameters are to be used for both command and disturbance, the parameters are to be connected regardless.

Setting rules according to Chien, Hrones and Reswick for determining the parameters can be found in the "setting rules" in this help information. Naturally, other methods can also be used for parameter finding.

Operation of the actuator can occur with the PWM generator TB_TCtrl_PWM, for example.

The TB_TCtrl_PIDT1 function module is a PIDT1 controller that is primarily geared toward temperature regulation of thermally-sluggish systems. The controller can be used as a PIDT1 controller or a P, PI, PD or PDT1 controller. Combinations of controller types are also possible, e.g. for command PD and disturbance PIDT1, which means it can be used for almost any conceivable control distances.

The controller can be used as a PIDT1 controller or a PI, PD or PDT1 controller. When x_Enable = TRUE, the module is activated. Successful activation is signaled with TRUE at the x_Active output. From this point, the controller is active and calculates the output sizes. When x_Enable = FALSE, all output sizes are set to 0.

The controller works with four data records for command (cooling and heating) and disturbance (cooling and heating). Different parameters are required for heating and cooling since oftentimes only active heating is carried out, and not active cooling. The switching between command and disturbance is determined with u_Thresh_RD. If the same parameters are to be used for both command and disturbance, the parameters are to be connected regardless.

Setting rules according to Chien, Hrones and Reswick for determining the parameters can be found in the "setting rules" in this help information. Naturally, other methods can also be used for parameter finding.

Operation of the actuator can occur with the PWM generator TB_TCtrl_PWM, for example.

The TB_TCtrl_PWM function module uses the four integer values of an array to generate the corresponding PWM signals or on/off signals for the operation of a relay for supplying the heating elements with power, for example. The TB_TCtrl_PWM function module can be used together with the TB_TCtrl_PIDT1 function module. Only the setting values i_Y in the a_PWM_Data array need to be entered once per controller call.

The function module generates the digital input/output signals from the array with four integer values to operate a relay, for example. The integer value must correspond to the call interval of the temperature controller in ms with a desired signal duration of 100%. Example:

The call interval of the temperature controller corresponds to 3 s, i.e. 3,000 ms.
100% of the controller output means that the digital output signal is active for 3,000 ms.
50% of the controller output means that the digital output signal is active for 1,500 ms.
The integer value of the array must therefore be between 0 and 3,000.

The TB_TCtrl_PWM function module uses the four integer values of an array to generate the corresponding PWM signals or on/off signals for the operation of a relay for supplying the heating elements with power, for example. The TB_TCtrl_PWM function module can be used together with the TB_TCtrl_PIDT1 function module. Only the setting values i_Y in the a_PWM_Data array need to be entered once per controller call.

The function module generates the digital input/output signals from the array with four integer values to operate a relay, for example. The integer value must correspond to the call interval of the temperature controller in ms with a desired signal duration of 100%. Example:

The call interval of the temperature controller corresponds to 3 s, i.e. 3,000 ms.
100% of the controller output means that the digital output signal is active for 3,000 ms.
50% of the controller output means that the digital output signal is active for 1,500 ms.
The integer value of the array must therefore be between 0 and 3,000.