Global

Commissioning

The PfwLib_TempControl.lib library is divided into six main structures.

ST_TcPfw_TempCtrlInput
This structure contains all linkable input variables.
ST_TcPfw_TempCtrlOutput
This structure contains all linkable output variables.
ST_TcPfw_TempMparamFromHmi_Itf
All machine parameters are stored in this structure.
ST_TcPfw_TempPparamFromHmi_Itf
All product parameters are stored in this structure.
ST_TcPfw_SupplyParam
Settings for PWM output are made in this structure.
ST_TcPfw_TempToHmi_Itf
This structure shows the current states of the temperature controller.

For successful commissioning of the temperature controller, the PfwLib_TempControl.lib library must be included in the project. The following steps must then be carried out:

Creating an instance of the function block FB_TempCtrlMainBody_TcPfw and declaring the variables

Variable	Short description	Example value
ConfigEnable	Signals the validity of the parameters.	TRUE
Callback_Enable	Enables background communication with the I/O terminals.	TRUE
Looptest_Enable	Activates the power monitoring of the heating tapes.	FALSE
tCycle	Cycle time (A cycle time unequal to the mains frequency is recommended).	0.025s
Simu_Enable	Starting a simulation.	FALSE
Simu_DisCharge	Reset simulation to initial value.	FALSE
Simu_DisCharge	Reset simulation to initial value.	FALSE

	The temperature library contains two simulations: A Pt2 path that is active when the aaaPfwTempMparamFromHmi[..].TempSensTerm parameter contains a 0 (recommended simulation for the user). If the parameter Simu_Enable is set, a physical model of an extruder cylinder becomes active. This simulation is mainly intended for development purposes and should not be activated by the user.

Constant definition

Variable	Short description	Type	Example value
cnPfwTempCtrlFirst	Number of the first zone (usually 1).	INT	1
cnPfwTempCtrlLast	Number of the last zone.	INT	32
cnPfwAppSupplyFirst	Number of the first supply group.	INT	1
cnPfwAppSupplyLast	Number of the last supply group.	INT	3
cnPfwTempTrendFirst	cnPfwTempTrendFirst and cnPfwTempTrendLast specify the number of samples for trend acquisition.	INT	1
cnPfwTempTrendLast	cnPfwTempTrendFirst and cnPfwTempTrendLast specify the number of samples for trend acquisition.	INT	100
cnPfwTempTrend_sPH	Period value of the sampling time in ms.	INT
cnPfwBoolOutSwapFirst	Initial index of the array out_SwappedDigitalOut.	INT	1
cnPfwBoolOutSwapLast	End index of the array out_SwappedDigitalOut.	INT	2 (When not in use)
cnPfwBoolInSwapFirst	Initial index of the array in_SwappedDigitalIn.	INT	1
cnPfwBoolInSwapLast	End index of the array in_SwappedDigitalIn.	INT	2 (When not in use)
cnPfwScopeSampleFirst	cnPfwScopeSampleFirst and cnPfwScopeSampleLast specify the number of samples for scope acquisition.	INT
cnPfwScopeSampleLast	cnPfwScopeSampleFirst and cnPfwScopeSampleLast specify the number of samples for scope acquisition.	INT
bPfw_UseTempControl	The feedback is active and thus the reading of actual values is possible.	BOOL	TRUE
bPfw_UseRtScope	The acquisition of scope data is active.	BOOL	FALSE
bPfw_UseTempTrend	The acquisition of trend data is active.	BOOL	FALSE
cnst_pfw_selRelAlarm	Via a TRUE, the selected setpoint is used for the relative alarms. With a FALSE the internally ramped setpoint is used.	BOOL	FALSE
cnPfwLoopTestTimer	Time in ms in which the power measurement measures.	LREAL	0.4 s
cnPfwLoopTestCycle	Time in ms which is available for the controller before the next zone is checked.	LREAL	9.999 s
cnst_PfwParamFilePath_CE	Folder path on a CE operating system.	STRING
cnst_PfwParamFilePath_XP	Folder path on an XP/ Win7 operating system.	STRING
cnst_PfwSubDir_Logging	Subfolder for log files.	STRING
cnst_PfwSubDir_Product	Subfolder for product files.	STRING
cnst_PfwSubDir_Machine	Subfolder for machine files.	STRING
cnst_PfwSubDir_Supply	Subfolder for supply files.	STRING
bPfw_UseEnergyRecording	Activation of a theoretical energy acquisition.	BOOL	FALSE
bPfwRunOn_WinCE	A TRUE activates the folder path for a CE operating system.	BOOL	TRUE

	Please note that the constants of the timer as well as the alarm visualization must also be taken into account.

	A heating zone in this library is an actuator (Solid State Relay - SSR or contactor), one or more heating tapes and a temperature sensor. If a calculated temperature is regarded as an actual value, this must be done in the application.

Sample project

The loading and saving of product and machine parameters as well as the general handling of the temperature library will be explained in more detail using the sample project. To start the application it is necessary to include the PfwLib_TempControl.lib and to adjust the path for saving and loading the parameters.