ItpReadZeroShiftEx

The ItpReadZeroShiftEx function block reads the zero shift components X, Y and Z for the given zero shift.

VAR_INPUT

VAR_INPUT
    bExecute       : BOOL;
    nZsNo          : UDINT;
    tTimeOut       : TIME;
END_VAR

bExecute: The command is triggered by a rising edge at this input.

nZsNo: Number of the zero shift. G54 to G59 are zero shifts at the NC. The valid range of values for 'nZsNo' is therefore from 54 to 59.

tTimeOut: ADS Timeout-Delay

VAR_IN_OUT

VAR_IN_OUT
    sNciToPlc      : NCITOPLC_NCICHANNEL_REF;
    sZeroShiftDesc : ZeroShiftDesc;
END_VAR

sNciToPlc: The structure of the cyclic channel interface from the NCI to the PLC. This structure is only accessed for reading. (type: NCTOPLC_NCICHANNEL_REF)

sZeroShiftDesc: The structure containing the components of the zero shift.

TYPE ZeroShiftDesc:
STRUCT
    fShiftX        : LREAL;
    fShiftY        : LREAL;
    fShiftZ        : LREAL;
END_STRUCT
END_TYPE

VAR_OUTPUT

VAR_OUTPUT
    bBusy     : BOOL;
    bErr      : BOOL;
    nErrId    : UDINT;
END_VAR

bBusy: This output remains TRUE until the function block has executed a command, but at the longest for the duration supplied to the 'Timeout' input. While Busy = TRUE, no new command will be accepted at the inputs. Please note that it is not the execution of the service but its acceptance whose time is monitored.

bErr: This output is switched to TRUE as soon as an error occurs during the execution of a command. The command-specific error code is contained in ‘nErrId’. Is reset to FALSE by the execution of a command at the inputs.

nErrId: Contains the command-specific error code of the most recently executed command. Is reset to 0 by the execution of a command at the inputs. The error numbers in ErrId can be looked up in the ADS error documentation or in the NC error documentation (error codes above 0x4000).

	For reasons of compatibility, there are two entries (coarse and fine) for each axis in each zero shift (e.g. G54). These two entries must be added together. This function block evaluates both the entries and adds them together automatically.

Requirements

Development environment	Target platform	PLC libraries to be linked
TwinCAT v3.1.0	PC or CX (x86 or x64)	Tc2_NCI