ItpGoAhead
from library version 4.0
 | Outdated version The sole purpose of the function block is to ensure compatibility with existing projects. For new projects please use the function block ItpGoAheadEx. |
Interface
VAR_INPUT
bExecute : BOOL;
nChnId : UDINT;
tTimeOut : TIME;
END_VAR
VAR_OUTPUT
bBusy : BOOL;
bErr : BOOL;
nErrId : UDINT;
END_VAR
Description
The function block ItpGoAhead may only be used in association with the decoder stop '@717'. There is a more detailed description of this decoder stop in the interpreter documentation.
The function block has the following inputs:
|
Input |
Data type |
Description |
|---|---|---|
|
bExecute |
BOOL |
The command is triggered by a rising edge at this input. |
|
nChnId |
UDINT |
Channel ID |
|
tTimeOut |
TIME |
ADS Timeout-Delay |
|
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 |
PLC libraries to include |
|---|---|---|
|
TwinCAT v2.7.0 |
PC (i386) |
TcNciItp.lib |
|
TwinCAT v2.8.0 |
PC (i386) |
TcNci.lib |