TC_SysLatency
The function block "TC_SysLatency" can be used to determine the current and maximum latency time of a TwinCAT system. The function corresponds to the TwinCAT latency time display in the TwinCAT system menu under real-time settings.
VAR_INPUT
VAR_INPUT
NETID : T_AmsNetId;
START : BOOL;
TMOUT : TIME := DEFAULT_ADS_TIMEOUT;
END_VAR
NETID: This parameter can be used to specify the AmsNetID of the TwinCAT computer whose latency time is to be determined (type: T_AmsNetID). If it is to be run on the local computer, an empty string can be entered.
START: the block is activated by a positive edge at this input.
TMOUT: States the length of the timeout that may not be exceeded by execution of the ADS command.
VAR_OUTPUT
VAR_OUTPUT
BUSY : BOOL;
ERR : BOOL;
ERRID : UDINT;
ACTUAL : UDINT;
MAXIMUM : UDINT;
END_VAR
BUSY: When the function block is activated this output is set. It remains set until a feedback is received.
ERR: If an error should occur during the transfer of the command, then this output is set once the BUSY output was reset.
ERRID: Supplies the ADS error number when the ERR output is set.
ACTUAL: The current latency time of a TwinCAT system in µs.
MAXIMUM: The maximum latency time of a TwinCAT system in µs (maximum latency time since the TwinCAT system was last started).
Requirements
Development environment |
Target platform |
PLC libraries to be integrated (category group) |
---|---|---|
TwinCAT v3.1.0 |
PC or CX (x86, x64, ARM) |
Tc2_Utilities (System) |