Input Description

EN

Data_Type	Default_Value	Range	Unit
BOOL	FALSE	TRUE/FALSE	-

The input EN has to be driven in edge triggered mode.

The execution of the Function Block is started with a positive edge on the input EN.

In the first call it evaluates its inputs and creates a local copy of them. Afterwards it starts its internal algorithm. It may take several PLC task cycles until it is executed.

Once the execution is completed DONE and its other outputs are set. To start the Function Block again a new positive edge on the input EN has to be applied.

SLOT

Data_Type	Default_Value	Range	Unit
BYTE	0	0 … 4 (6)	-

At input SLOT, the Communication Module slot is specified which should be used by the Function Block.

The internal Communication Module always has the index 0. All external Communication Modules are serially numbered from right to left, starting with 1.

NODE

Data_Type	Default_Value	Range	Unit
DWORD	0	1 … 4294967295	-

NODE represents the ETHERCAT address of the slave.

IDX (index)

Data_Type	Default_Value	Range	Unit
WORD	0	1 … 65535 (depending on the ETHERCAT slave)	-

Index of the object which should be read/written.

SUBIDX (subindex)

Data_Type	Default_Value	Range	Unit
BYTE	0	1 … 255 (depending on the ETHERCAT slave)	-

Subindex of the object, which should be read/written.

LEN (length)

Data_Type	Default_Value	Range	Unit
UINT	0	1 … 65535	byte

LEN tells the function block how large the buffer in SLV_STATE is. For each slave 4 bytes are needed.

DATA (object \ data)

Data_Type	Default_Value	Range	Unit
POINTER_TO_ARRAY_OF_BYTE	0	-	-

Address of the data buffer where the value of the object (Index:Subindex) should be written. The needed buffer depends on the queried object.

TOUT (timeout)

Data_Type	Default_Value	Range	Unit
UINT	0	0-65535	ms

Timeout constraint for the function block. If this is exceeded, the function block returns with ERR set to TRUE.