ST_TopologyDataEx

The structure ST_TopologyDataEx contains information on EtherCAT topology and hot-connect groups.

TYPE ST_TopologyDataEx:
STRUCT
   nOwnPhysicalAddr  :  UINT;
   nOwnAutoIncAddr   :  UINT;
   stPhysicalAddr    :  ST_PortAddr;
   stAutoIncAddr     :  ST_PortAddr;
   aReserved1        :  ARRAY [0..3] OF UDINT;
   nStatusBits       :  DWORD;
   nHCSlaveCountCfg  :  UINT; (*nStatusBits.0 = TRUE: DcSupprt;.1 = TRUE: DC64Supprt; .2=TRUE: SlavePresent following hot connect info requires runtime >= TC 2.11 R3 B2246 nStatusBits.3 = TRUE: HotConnectGroupStart; .4 = HotConnectSlave; .5 = TRUE: HotCOnnectInvalidB; .6 = TRUE: HotConnectInvalidC; .7 = TRUE: HotConnectInvalidD*)
   nHCSlaveCountAct  :  UINT;
   aReserved2        :  ARRAY [0..4] OF UDINT;
END_STRUCT
END_TYPE

Name	Type	Description
nOwnPhysicalAddr	UINT	Dedicated physical EtherCAT address of the EtherCAT slave device
nOwnAutoIncAddr	UINT	Dedicated auto-increment EtherCAT address of the EtherCAT slave device
stPhysicalAddr	ST_PortAddr	Physical address information of the EtherCAT slave devices at port A…D
stAutoIncAddr	ST_PortAddr	Auto-increment address information of the EtherCAT slave devices at port A…D
aReserved1	ARRAY [0..3] OF UDINT	Reserved
nStatusBits	DWORD	nStatusBits.0 = TRUE: Distributed clock is supported nStatusBits.1 = TRUE: Distributed Clock is supported (64-bit) nStatusBits.2 = TRUE: slave is present nStatusBits.3 = TRUE: slave is start node of a Hot Connect group nStatusBits.4 = TRUE: slave is in a Hot Connect group nStatusBits.5 = TRUE: Hot Connect is invalid at port B nStatusBits.6 = TRUE: Hot Connect is invalid at port C nStatusBits.7 = TRUE: Hot Connect is invalid at port D
nHCSlaveCountCfg	UINT	Configured number of Hot Connect group devices
nHCSlaveCountAct	UINT	Found number of Hot Connect group devices
aReserved2	ARRAY [0..4] OF UDINT	Reserved

Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT v3.1.0	PC or CX (x86, x64, ARM)	Tc2_EtherCAT