ItpRetraceMoveBackward
The function block ItpRetraceMoveBackward deals with the geometric entries at the actual position at the start of the part program (G-Code).
VAR_INPUT
VAR_INPUT
bExecute : BOOL;
tTimeOut : TIME;
END_VAR
bExecute: The command is triggered by a positive edge at this input.
tTimeOut: ADS Timeout-Delay
VAR_IN_OUT
VAR_IN_OUT
sNciToPlc : NCTOPLC_NCICHANNEL_REF;
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)
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).
Procedure
- 1. Activate feeder backup list (see ItpEnableFeederBackup)
- The NC program is stopped with ItpEStopEx
- 2. Wait and ensure that all axes in the group are at standstill
- 3. Call ItpRetraceMoveBackward
- 4. Stop backward movement with ItpEStop, otherwise the program returns to the start
- 5. Call ItpRetraceMoveForward to move forward again
- 6. Call ItpEStopEx and ItpRetraceMoveBackward etc., if required.
Voraussetzungen
Entwicklungsumgebung | Zielplattform | Einzubindende SPS-Bibliotheken |
|---|---|---|
TwinCAT V3.1.0 Classic Interpreter TwinCAT V3.1.4024.40 GST Interpreter | PC oder CX (x86 oder x64) | Tc2_NCI |