ItpSingleBlock

The ItpSingleBlock function block activates or deactivates single block mode in the NCI. Block relaying can be triggered directly from the PLC with the input 'bTriggerNext'. Alternatively the Start button of the interpreter (F5) can be used in the XAE.

A more detailed description can be found in the interpreter documentation.

VAR_INPUT

VAR_INPUT
    bExecuteModeChange  : BOOL;
    nMode               : E_ItpSingleBlockMode;
    bTriggerNext        : BOOL
    tTimeOut            : TIME;
END_VAR

bExecuteModeChange: Single block mode (nMode) is activated through a rising edge at this input.

nMode: Operation mode for single block (cf. single block mode):

ItpSingleBlockOff: single block off
ItpSingleBlockNck: single block in NC kernel
ItpSingleBlockIntp: single block in interpreter

	ItpSingleBlockIntp is not available if the GST interpreter is used.

bTriggerNext: Block relaying is triggered by a rising 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)

TYPE E_ItpSingleBlockMode:
(
    ItpSingleBlockOff   := 0,
    ItpSingleBlockNck   := 1,
    ItpSingleBlockIntp  := 16#4000
);
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).

Requirements

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