ItpEnableFeederBackup

from library version 6.1.24 and anticipated with TwinCAT version 2.10 Build 1308

ItpEnableFeederBackup 1:

The function block ItpEnableFeederBackup enables storing of the path for reversing. It has to be activated once before the NC program (G-Code) is started. If the Blocksearch functionality is used, ItpEnableFeederBackup has to be activated before ItpBlocksearch is called. Feeder backup is executed as long as a TwinCAT restart or bEnable = FALSE is triggered with a rising edge at bExecute.

If feeder backup is not enabled, reversing does not work. This can be verified via ItpIsFeederBackupEnabled.

Interface

VAR_INPUT
    bEnable        : BOOL;
    bExecute       : BOOL;
    tTimeOut       : TIME;
END_VAR

VAR_IN_OUT
    sNciToPlc      : NciChannelToPlc;
END_VAR

NciChannelToPlc

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

Input	Data type	Description
bEnable	BOOL	TRUE: enables feeder backup FALSE: disables feeder backup
bExecute	BOOL	The command is triggered by a rising edge at this input.
tTimeOut	TIME	ADS Timeout-Delay

Input/output	Data type	Description
sNciToPlc	NciChannelToPlc	The structure of the cyclic channel interface from the NCI to the PLC. This structure is only accessed for reading.

Output	Data type	Description
bBusy	BOOL	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	BOOL	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	UDINT	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).

Requirements

Development Environment	Target System Type	PLC Libraries to include
TwinCAT v2.10.0	PC (i386)	TcNci.lib