IFM AC1433, Device Manual

Page: 158 / 168

SmartPLC DataLine with EtherCAT slave interface
158
>
Read acyclic data records
42163
To access acyclic data sets of the device the user can use the TwinCAT function block
FB_EcCoESdoRead. The functions block is part of the TwinCAT library Tc2_EtherCAT.lib (
→
TwinCAT documentation).
The user has to configure the parameters of the function block:
Input Description Possible values
sNetId AMS net ID of the device depends on the project, e.g. 172.16.2.131.2.1
nSlaveAddr EtherCAT address of the device depends on the project, e.g. 1006
nIndex index of the field bus object 0x2013 read/write an acyclic data set
nSubIndex subindex of the fieldbus object xx number of the data set DSxx
(
→
Overview: acyclic data sets (DSx)
(
→ S.
152 ))
pDstBuf pointer to the structure variable (e.g.
arRxData) to which the read data set DSxx
is written address of the structure variable, e.g.
ADR(arTxData)
cbBufLen maximum size of the data buffer (number of
the words) depending on the command, e.g. 8