ST_TcPfw_SupplyParam

This structure describes the parameters and runtime data of a supply unit.

Syntax

TYPE ST_TcPfw_SupplyParam :
(* last modification: 28.05.2008 *)
STRUCT
(*
see cnv_SupplyParam_TcPfw for format definition
*)

(*
temperature controller pwm setup
*)
fPwmCycleTime   : LREAL; (* will be updated to all temperature zones in supply group *)
fPwmMinOnTime   : LREAL;  (* will be updated to all temperature zones in supply group *)
fPwmMaxOnTime   : LREAL; (* will be updated to all temperature zones in supply group *)
fPwmMaxOnC      : LREAL; 
fPwmMaxRampLoad : LREAL;        (* in kW, will be updated to all temperature zones in supply group *)

fActSupplyLoad  : LREAL;
fActSupplyCurrent: LREAL;
fSupplyLoad     : LREAL;
fSupplyMatch    : LREAL;

nPwmFactorC     : INT:=1; (* will be updated to all temperature zones in supply group *)

(*
internal
*)
fUsedLoad       : LREAL;
fUsedLoad_H     : LREAL;
fUsedLoad_C     : LREAL;
tpwmtimer       : LREAL:=0.0;

SaveDelay       : DINT:=-1;
FileErrId       : DINT;


refresh_H       : BOOL;

Unsaved         : BOOL;        
bSavingParams   : BOOL:=FALSE; (* *)
bLoadParams     : BOOL:=FALSE; (* *)
FileErr         : BOOL:=FALSE; (* *)
END_STRUCT
END_TYPE

Parameter

Name	Type	Description
fPwmCycleTime	LREAL	The cycle time (in seconds) of the PWM signal generator.
fPwmMinOnTime	LREAL	The minimum switch-on component of the PWM signal. Range 0.1 to 1.0
fPwmMaxOnTime	LREAL	The maximum switch-on time from the PWM signal. Range 0.1 to 1.0
fPwmMaxOnC	LREAL	The maximum switch-on time of the cooling output from the PWM signal. If zero, the fPwmMaxOnTime is used. Range 0.1 to 1.0
fPwmMaxRampLoad	LREAL	reserved
fActSupplyLoad	LREAL	If a power measurement is performed, the current power can be read here.
fActSupplyCurrent	LREAL	If a power measurement is performed, the current currently measured can be read here.
fSupplyLoad	LREAL	The predicted total power of the supply line.
fSupplyMatch	LREAL	The ratio of fActSupplyLoad to fSupplyLoad.
nPwmFactorC	INT	The multiplier for the cooling PWM cycle time. Tpwm_cool := Tpwm_heat * nPwmFactorC.
fUsedLoad	LREAL	reserved
fUsedLoad_H	LREAL	reserved
fUsedLoad_C	LREAL	reserved
tpwmtimer	LREAL	Counter for the PWM cycles of the heating control.
SaveDelay	DINT	Memory delay in µs. After a time written to this variable by the application, the saving is triggered. (If the value is zero, the system is saved; if it is -1, the system is at rest; if the value is greater than zero, the system is saved after the time has elapsed)
FileErrId	DINT	In case of storage/loading of the zone, a coded information is provided here. However, only if saving and loading are performed via the machine and product parameters.
refresh_H	BOOL	Trigger signals for heating and cooling PWM cycles.
Unsaved	BOOL	Signals the application that parameters have changed from the library.
bSavingParams	BOOL	Signals to the application that data are being saved.
bLoadParams	BOOL	This flag triggers the saving of the parameters.
FileErr	BOOL	In case of storage/charging of the zone, it is displayed here if the storage or charging process has failed.

The controller output is usually provided to the heating tape as a PWM signal. It is possible to provide a separate PWM configuration for each phase of a supply line.