MCV_Trace
This FB can log axis positions and dynamic data cyclically or output diagnostic logs.
The logs for axes and trace data type can be parameterised.
Notice
The FB can only be invoked sequentially, i.e. different trace logs cannot be generated in parallel. The FB can only be re-commanded if it was previously ended with StopTrace = TRUE or if writing of the TraceFile has ended.
Notice
The “Error” output is currently not supported.
Block diagram
FB parameters
VAR_INPUT | ||
Variable name | Data type | Description |
StartTrace | BOOL | The trace log starts on the rising edge of this input signal. |
StopTrace | BOOL | The trace log stops on the rising edge of this input signal. |
StartWriteFile | BOOL | The output to file starts on the rising edge of this input signal. |
WriteAsciiHeader | BOOL | When TRUE, the header to describe the logged data is also written to the output file. |
FileName | MCV_STRING128 | Name of the trace file |
TraceType | UDINT | Type of logged data (see Description of “TraceType” input: |
ProtocolRate | UDINT | Logging cycle in interpolator cycles. |
TraceAxes | MCV_ARRAY_INT | Array with axis selection (see Description of “TraceAxes” input) |
TraceData | UDINT | Selection of logged data (see Description of “TraceData” input |
VAR_OUTPUT | |||
Variable name | Data type | Description | |
Active | BOOL | Is TRUE as long as data logging is active. | |
WriteFile | BOOL | Is TRUE as long as data output is active. | |
Error | BOOL | Indicates whether an error occurred in an FB (the output pin is currently not supported). | |
StateString | STRING | Indicates the current state of the FB as a string. The following strings are possible: IDLE WRITE_TRACE_PARAMETER START_TRACE TRACING STOP_STOP TRACE_STOPPED START_WRITE_TO_FILE WRITING_TO_FILE TRACE_FILE_WRITTEN TRACE_ERROR | |
State | INT | Indicates the current state of the FB. The possible values for State and their meanings are described below: | |
Value | Meaning | ||
1 | TRACE_IDLE, TRACE_ERROR | ||
2 | WRITE_TRACE_PARAMETER | ||
3 | START_TRACE | ||
4 | TRACING | ||
5 | TRACE_STOP | ||
6 | TRACE_STOPPED | ||
7 | START_WRITE_TO_FILE | ||
8 | WRITING_TO_FILE | ||
9 | TRACE_FILE_WRITTEN | ||