Pin Description - OverloadCtrlEnc

Input Pin Description

Input	Data Type	Description
i_xEn	BOOL	The enable function enables or disables the function. Refer also to i_xEn below this table. TRUE: Enabled FALSE: Disabled
i_iDrvTrqActl	INT	This is the actual torque on the motor. Range: –3000...3000 Scaling/Unit: 0.1%
i_wDrvTrqMax	WORD	This is the maximum torque allowed before an overload alarm is generated. The range is between 0 and 3000 (0.1%). Range: 0...3000 Scaling/Unit: 0.1%
i_wFltrTime	WORD	This is the time delay set by the operator for the function block to wait before generating an overload alarm. This is used to avoid any jerking in the system that is being registered as an alarm. Range: 0...200 s Scaling/Unit: 0.1 s
i_iDrvSpdActl	INT	This is the speed value from the drive input through the fieldbus. Refer also to i_iDrvSpdActl below this table. Range: –6000...6000 RPM
i_wEncPos	WORD	This is the value from the encoder through the fieldbus. Refer also to i_wEncPos below this table. Range: 0...65535 count

i_xEn

By setting the i_xEn input to FALSE the output states will be overwritten by a defined fallback state which is specific for each function block.

As soon as the function block gets enabled again the output states will be updated corresponding to the function block behavior as described above. There is no additional action required from you to re-establish the enabled state.

The fallback states of OverloadCtrlEnc are given in the table below.

Output	Data Type	Fallback State
q_xEn	BOOL	FALSE
q_xOvldAlrm	BOOL	FALSE

Outputs that are not listed will retain their current values.

i_iDrvTrqActl

The input i_iDrvTrqActl is read in through a fieldbus communication interface directly from the drive. It is a mandatory input for the function.

The range of the torque is –300% to 300%.

i_wEncPos

This is used as the feedback to calculate the distance traveled under overload.

NOTE: The 16 bit encoder resolution of WORD type is converted to 32 bit resolution DINT internally by the function block.

Output Pin Description

Output	Data Type	Description
q_xEn	BOOL	This displays the status of the enable parameter. TRUE: Enabled FALSE: Disabled
q_xOvldAlrm	BOOL	This is the overload alarm output. Refer also q_xOvldAlrm below this table. TRUE: Alarm overload detected. FALSE: No alarm detected.

Output

Data Type

Description

q_xEn

BOOL

This displays the status of the enable parameter.

TRUE: Enabled

FALSE: Disabled

q_xOvldAlrm

BOOL

This is the overload alarm output. Refer also q_xOvldAlrm below this table.

TRUE: Alarm overload detected.

FALSE: No alarm detected.

q_xOvldAlrm

If the upward movement of the hoist needs to be restricted during an overload condition, the application designer must interlock this particular output to the crane program.

NOTE: The overload alarm q_xOvldAlrm and the position are retained after warm start.