Input Description

EN (enable)

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

In order to enable the function block processing, input EN has to be continuously set to TRUE. The function block is not processed if input EN = FALSE. While input is set to TRUE, the inputs are continuously checked for validity and plausibility. If this is not the case, processing is aborted and an error is displayed.

SLOT

Data_Type	Default_Value	Range	Unit
BYTE	0	-	-

The input parameter SLOT chooses the ETHERCAT Communication Module to be queried. The slots are numbered from right to left. Slot number 1 is the one beside the CPU.

NODE

Data_Type	Default_Value	Range	Unit
WORD	0	-	-

NODE represents the ETHERCAT address of the slave.

DIAG_S500_FORMAT (diagnosis \ S500format)

Data type: BOOL, default value: FALSE, range: FALSE, TRUE

With DIAG_S500_FORMAT is decided in which format the data should be returned. With a value of TRUE, the DIAG_DATA is formatted in ABB format. With a value of FALSE, the data coming from the slave is copied without modification.

DIAG_DATA (diagnosis \ data)

Data type: POINTER TO ARRAY OF BYTE, default value: 0

This input parameter is the address of the buffer that receives the diagnosis data. The needed buffer is directly related with the variable DIAG_S500_FORMAT. Is this variable set to TRUE, 25 bytes are needed (5 bytes per error). In this case, DIAG_DATA can be defined as the example below:

ECAT_SLV_DIAG_DIAG_DATA: DIAGDAT[5]; (* size of DIAGDATA is 5. Array of 5, one for each error = 25 bytes *)

The structure DIAG_DATA is defined as follows:

TYPE DIAG_DAT      : STRUCT
ERR_CLASS     : BYTE;
SLAVE_NR      : BYTE;
MODULE_NR     : BYTE;
CHANNEL_NR    : BYTE;
ERROR_NR      : BYTE;
END_STRUCT
END_TYPE

In case DIAG_S500_FORMAT is set to FALSE, a buffer of 40 bytes is needed (8 bytes per error, 5 errors max.), e. g.:

ECAT_SLV_DIAG_DIAG_DATA: ARRAY [1..40] OF BYTE;

The buffer should not be smaller than the sizes given for each format. Should the buffer be smaller, it will be overwritten with unexpected consequences.