I/O Connection PLC State

Type:	Communications Register
RMC75 Address:	%MD21.24
RMC150 Address:	%MD45.24
RMC200 Address:	EtherNet/IP Connection #1: %MD112.1 EtherNet/IP Connection #2: %MD112.5 EtherNet/IP Connection #3: %MD112.9 PROFINET I/O Connection: %MD112.13
RMC75/150 System Tag:	_Enet.PLCStatus
RMC200 System Tag:	EtherNet/IP Connection #1: _Enet.IOConn1PLCState EtherNet/IP Connection #2: _Enet.IOConn2PLCState EtherNet/IP Connection #3: _Enet.IOConn3PLCState PROFINET I/O Connection: _Enet.PNIOConnPLCState
How to Find:	Address Selection Tool → Controller → Communication Settings → Ethernet
Data Type:	DINT
Accessibility:	Read Only

These registers indicate the RUN/STOP (or RUN/PROGRAM) state of the I/O controller for EtherNet/IP and PROFINET I/O communications. For more details, see Handling Broken EtherNet/IP I/O Connections and Handling Broken PROFINET Connections.

For the RMC75 and RMC150, there is a single PLC State register shared by EtherNet/IP and PROFINET. If there is an Exclusive Owner EtherNet/IP I/O connection open, this register will reflect the state of the PLC controlling that connection. If there is a PROFINET I/O connection open, then this register will reflect the state of the I/O controller (PLC) for that connection.

For the RMC200, there is one PLC State register dedicated to each EtherNet/IP and PROFINET I/O connection.

Each register can hold one of the following three values:

Value	Description
0	Unknown Applies when the I/O connection is not currently active.
1	RUN
2	PROGRAM or STOP