Omron C200HW-CORT21 Operation Manual page 37

Control and Status area
IR n+3.03 New user defined CAN message(s) received
This bit is set when one (or more) specific CAN message has
been received since the last I/O refresh. The received messages
are transferred to the PLC during the same I/O refresh as when
this bit is set. Refer to section 4-6 for details.
0: No new user defined CAN message is received since the last
I/O refresh.
1: New user defined CAN message(s) received and transferred
to the PLC memory.
IR n+3.09 Network power failure
The network transmission interface of the C200HW-CORT21 is
galvanicly isolated and requires power via pin 1 and 5 of the bus
connector.
0: No network power failure.
1: Network power failure.
This error is also indicated on the 7-segment display (see
section 3-3).
IR n+3.10 Bus Off
If the C200HW-CORT21 detects an abnormal rate of errors on
the bus, the Unit will go bus off. This means that all CAN
communication is stopped. The Unit will try to go online again
after toggling IR n.03 'Start Bus Off recovery'.
0: Unit is online.
1: Unit has gone bus off.
This error is also indicated on the 7-segment display (see
section 3-3).
When a network power failure is detected during Bus Off, IR
n+3.10 is reset and IR n+3.09 is set. When the network power
failure is solved, the Bus Off recovery sequence is started
automatically.
IR n+3.13 Wrong CPU Unit
The C200HW-CORT21 can only be mounted on a C200H Alpha
PLC or CS1 backplane. On any other PLC backplane IR n+3.13
is set.
0: No error
1: The Unit is mounted on a PLC backplane that is not
supported.
The ERR-LED is ON and the CAN communication is
disabled.
IR n+3.14 Application error
0: No error
1: Application error.
The ERR-LED is ON and the CAN communication is
disabled. This is a fatal error; if this error keeps on recurring,
contact the distributor.
Section 3-2
35