Input Pin Description - CableLength_Enc

Input Pin Description - CableLength_Enc_2

Input Pin Description

Input	Data Type	Description
i_xEn	BOOL	TRUE: Enables the function block. FALSE: Disables the function block. Refer to detailed description below this table.
i_xCalbMode	BOOL	This input enables the calibration. TRUE: Calibration active. FALSE: Calibration inactive. Refer to detailed description below this table.
i_wPulsEnc	WORD	This is the encoder pulses input from the drive (PUC). Range: 0 to 65535
i_xHighLim	BOOL	This is the forward stop limit switch input of the hoisting axis. NOTE: It is mandatory to use a limit switch which is normally closed (NC contact). TRUE: Limit inactive FALSE: Limit active
i_rLoadLen	REAL	This input is the input for an additional load length if needed. Range: 0...100 Scaling/Unit: 1 m
i_stCLE	CLE	Refer to Sub-structure description.

i_xEn

NOTE: If the information of the limit switch input i_xHighLim is transferred via the fieldbus, connect the status of the fieldbus communications to this i_xEn input, because during the boot-up phase of the controller, the fieldbus becomes operational later than the program of the controller. This could lead to an incorrect cable length output of the function block.

Example of CANopen status verification for node 3:

VAR
      GET_STATE_Node: CIA405.GET_STATE;
      xNodeOperational: BOOL;
END_VAR
_____________________________________________
(* Check the CANopen node with NodeId 3 *)
GET_STATE_Node(
      NETWORK:= 1,
      ENABLE:= NOT GET_STATE_Node.CONFIRM AND NOT (GET_STATE_Node.ERROR > 0),
      TIMEOUT:= 1000,
      DEVICE:= 3);

IF GET_STATE_Node.CONFIRM OR (GET_STATE_Node.ERROR > 0) THEN
      xNodeOperational:= (GET_STATE_Node.STATE = 5);
END_IF

Example of EtherNet/IP status Verification for a device with connection id 257:

VAR
xEipHealth: BOOL;
END_VAR
_____________________________________________
(* Check the Ethernet/IP device with connection Id 257 *)
xEipHealth:= UINT_TO_BOOL(EipGetHealth(i_uiconnId:= 257));

By setting the i_xEn input to FALSE the output states will be overwritten by a defined fallback state. 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.

WARNING

UNINTENDED EQUIPMENT OPERATION

Ensure that the status of the fieldbus communications is used to enable the function block.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

The fallback state of CableLengthEnc_2 is given in the table below:

Output	Data Type	Fallback State
q_xEn	BOOL	FALSE
q_rLenActl	REAL	0
q_diCalbPulsVal	DINT	no change
q_xCalbDone	BOOL	no change
q_wAlrmId	WORD	0
q_xAlrm	BOOL	FALSE

i_xCalbMode

This is the input to enter into calibration mode of the FB. The calibration is conducted as followed:

1.It is mandatory to use a limit switch which is normally closed (NC contact).

2.Lift the hoist up to its highest limit, so the i_xHighLim is getting FALSE.

3.Set the i_xCalbMode input to TRUE.

4.Lower the hoist down to the ground.

5.Enter the distance from the top position down to the ground into the i_stCLE.rCalbCbleLen input, scaling is 1.0 meter.

6.Set the i_xCalbMode input to FALSE.

Sub-Structure Description of i_stCLE

A structure of the data type CLE containing configuration parameters.

For example, a declaration of structure variable with initial values:

VAR

structure_instance: data_type := (element1 := XX, element2 := YY);

END_VAR

Structure Parameter	Data Type	Description
rCbleLenMin	REAL	Remaining cable length at forward stop. When the hoist was stopped by the upper limit switch (forward stop) there is normally a distance left between the hook and the point where the cable is attached to the drum, the remaining cable length which cannot be under-run. This is the minimum cable length. Range: 0.5...10 Scaling/Unit: 1 m
rCalbCbleLen	REAL	Length of the calibration run. This is the length driven during calibration, usually the length in between the upper limit switch of the hoist and the hook touching the ground, the maximum length of the crane. It is used to determine the ratio of length versus pulses and only entered once during calibration. Range: 0...100 Scaling/Unit: 1 m
diCalbPulsVal	DINT	Number of pulses to rCalbCbleLen for manual override of calibration. In a series of cranes where the calibration results are known, this is the manual override to omit the calibration procedure. It determines the number of pulses relating to the entered value of pulses at rCalbCbleLen. Range: 1...2147483647 Scaling/Unit: 1 pulse

Structure Parameter

Data Type

Description

rCbleLenMin

REAL

Remaining cable length at forward stop.

When the hoist was stopped by the upper limit switch (forward stop) there is normally a distance left between the hook and the point where the cable is attached to the drum, the remaining cable length which cannot be under-run. This is the minimum cable length.

Range: 0.5...10

Scaling/Unit: 1 m

rCalbCbleLen

REAL

Length of the calibration run.

This is the length driven during calibration, usually the length in between the upper limit switch of the hoist and the hook touching the ground, the maximum length of the crane. It is used to determine the ratio of length versus pulses and only entered once during calibration.

Range: 0...100

Scaling/Unit: 1 m

diCalbPulsVal

DINT

Number of pulses to rCalbCbleLen for manual override of calibration.

In a series of cranes where the calibration results are known, this is the manual override to omit the calibration procedure. It determines the number of pulses relating to the entered value of pulses at rCalbCbleLen.

Range: 1...2147483647

Scaling/Unit: 1 pulse