ReadCrcErrors (FB)¶

FUNCTION_BLOCK ReadCrcErrors EXTENDS ETrigA

This function block is for reading the the crc counters of EtherCAT slaves.

Example:

Following example code reads the crc error counters

PROGRAM PLC_PRG
VAR
   etcReadCrc : ReadCrcErrors;
   xRead : BOOL;
END_VAR
etcReadCrc(xExecute := xRead, usiCom:=1, wSlaveAddress := 1002,
     xAutoIncAdr := FALSE, udiTimeout := 500);

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	`xExecute`	`BOOL`		Rising edge: Action starts Falling edge: Resets outputs If a falling edge occurs before the function block has completed its action, the outputs operate in the usual manner and are only reset if either the action is completed or in the event of an error. In this case, the corresponding output values (`xDone`, `xError`, `iError`) are present at the outputs for exactly one cycle.	ETrigA
Input	`xAbort`	`BOOL`		`TRUE`: Action is stopped immediately and all outputs are reset to their initial values.	ETrigA
Output	`xDone`	`BOOL`		`TRUE`: Action successfully completed	ETrigA
	`xBusy`	`BOOL`		`TRUE`: Function block active	ETrigA
	`xError`	`BOOL`		`TRUE`: Error occurred, function block aborts action `FALSE`: No error	ETrigA
	`xAborted`	`BOOL`		`TRUE` : Action aborted by user	ETrigA
Input	`usiCom`	`USINT`	1	index of master 1: first Ethercat master
	`wSlaveAddress`	`WORD`		address either auto increment address or physical address of device
	`xAutoIncAdr`	`BOOL`		flag that determines which way to use the given address
	`udiTimeOut`	`UDINT`		Timeout for operation in ms
Output	`usiCrcPortA`	`USINT`		Invalid frame counter of Port A (counting is stopped when 0xFF is reached).
	`usiCrcPortB`	`USINT`		Invalid frame counter of Port B (counting is stopped when 0xFF is reached).
	`usiCrcPortC`	`USINT`		Invalid frame counter of Port C (counting is stopped when 0xFF is reached).
	`usiCrcPortD`	`USINT`		Invalid frame counter of Port D (counting is stopped when 0xFF is reached).
	`uiWorkingCounter`	`UINT`		working counter of received command