FB_ReadAdsTecSysData
The FB_ReadAdsTecSysData function block reads the system data/diagnostic data of an ads-tec industrial PC. The function block is level-triggered, i.e. the system data is only read cyclically when the bEnable input is set. To keep the system load low, the read cycle is automatically repeated every ~100 ms (default value). When the bValid output is set, the most recently read data is valid (i.e. the last read cycle was carried out without error). If an error occurs, the bError output is set, and cyclic reading is stopped. With a new rising edge at the bEnable input, existing errors can be deleted and cyclical reading can be restarted.
Inputs
VAR_INPUT
sNetId : T_AmsNetId;
bEnable : BOOL;
tCycleTime : TIME := T#100ms;
END_VARName | Type | Description |
|---|---|---|
sNetId | T_AmsNetID | A string with the network address of the TwinCAT computer whose system data are to be read can be specified here. For the local computer an empty string may be specified. |
bEnable | BOOL | The function block is reset with a rising edge (previous errors at output bError and nErrId deleted). The system data are read cyclically if the input is set. |
tCycleTime | TIME | The cyclic reading interval. |
Outputs
VAR_OUTPUT
bValid : BOOL;
bError : BOOL;
nErrId : UDINT;
stSysData : ST_AdsTecSysData;
END_VARName | Type | Description |
|---|---|---|
bValid | BOOL | When the function block is enabled, this output is set and remains set until a feedback is received. |
bError | BOOL | If an error should occur during the transfer of the command, then this output is set once the BUSY output was reset. |
nErrId | UDINT | Returns the ADS error number when the bError output is set. |
stSysData | Structure with the system data/diagnostic data. |
Requirements
|
Development environment |
Target platform |
IO hardware |
PLC libraries to be integrated (category group) |
|---|---|---|---|
|
TwinCAT v3.1.0 |
None. This functionality is not supported by TwinCAT 3 at present! |
ads-tec PC |
Tc2_IoFunctions (IO) |