MCV_TorqueLimit

The MCV_TorqueLimit FB limits the maximum torque of the drive for every motion direction independently.

Blockdiagramm

Parameters of the FB

VAR_INPUT
Variable name	Data type	Description
enable	BOOL	If "Enable“ is TRUE, the torque limit is active.
TorqueLimitPositive	INT	Maximum drive torque which may occur in the positive motion direction. Default unit [0.1%]
TorqueLimitNegative	INT	Maximum drive torque which may occur in the negative motion direction. Default unit [0.1%]

VAR_OUTPUT
Variable name	Data type	Description
ActualTorque	INT	Currently effective drive torque. Default unit [0.1%]
LimitActive	BOOL	The torque limit is activated.
LimitReachedPositive	BOOL	The maximum torque for the positive motion direction is reached.
LimitReachedNegative	BOOL	The maximum torque for the negative motion direction is reached.
Error	BOOL	Indicates TRUE if an error occurs in the FB.
ErrorID	WORD	Error code.

Behaviour of the FB

The torque limit can always be specified whenever the ISG-MCP has been initialised correctly.
The torque limit must be specified separately for each motion direction of the axis. If no value is specified for the torque limit via the "TorqueLimitPos" or "TorqueLimitNeg" inputs, the FB specifies the default of 100%. Input values less than 0% and values greater than 130% are converted to 0% or 100% without any further message.
The MVC_PosLagMonitor FB is used to deactivate the position lag error monitor.
The "LimitReachedPos" and "LimitReachedNeg" outputs become TRUE whenever the currently active torque corresponds to at least 95% of the torque commanded by this FB.