Omron CJ1W-CORT21 Operation Manual page 38

1 Features and System Configuration
The integrity check for the message fails. The
check is done by the CAN Unit directly, or the
firmware.
The integrity check for the message is success-
ful. The User Defined CAN Unit is not able to
process the message due to overload condi-
tions.
The integrity check for the message is success-
ful and the User Defined CAN Unit is able to
process the message, but no input message
buffer is configured for the received identifier.
The integrity check for the message is success-
ful. The User Defined CAN Unit is able to pro-
cess the message and an input message buffer
is configured for the received identifier.
Precautions for Correct Use Precautions for Correct Use
Successive messaging, sending or receiving messages with a high rate is not explicitly sup-
ported nor implemented.
1-4
Condition
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Unit Processing
The User Defined CAN Unit sends an error frame on the CAN
bus.
The message is rejected by the CAN controller and/or the
firmware, no notification is sent to the application layer.
The User Defined CAN Unit sends an acknowledge on the
CAN bus, ignores the message, and in the next cyclic refresh
of the CPU the receive queue overflow device variable
(*_RcvOver) is turned ON.
The User Defined CAN Unit sends an acknowledge on the
CAN bus and ignores the message.
The User Defined CAN Unit sends an acknowledge on the
CAN bus, and processes the message with the following
actions in next Unit Cyclic refresh:
• Device variable *_MsgRcv is turned ON.
• The message content is copied to the first input message
buffer that is configured for the received identifier.
• Set the receive flag of the first input message buffer that is
configured for the received identifier (see 4-2 Unit Configu-
ration and Control).