Omron CJ1W-CORT21 Operation Manual page 69

State
ST1 Initializing
ST2 Start-up error
ST3 Not configured
ST4 Configured
ST5 Communicating
 Events
Events will force the Unit to switch to a different state. These events can be user initialized, caused
by system behavior or error conditions detected in the system. Changed state information is
reflected as changes in device variables for CJ-series
initialized and no start-up errors occur.
Event
EV1
EV2
EV3
EV4
EV5
Bus Off State
In case the User Defined CAN Unit detects an abnormal rate of errors on the bus, the Unit will go in
bus off. This means that all CAN communication is disabled and the Unit will try to go online after the
user enables the communication (normally this is initiated in the user program). In the bus off state
the Unit will:
• Turn ON the *_BusoffErr
• Activate event EV5, i.e. disable communications
• Turn ON the ERR LED indicator
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Cyclic refresh of message
Name
command(s)
No
No
Yes
Yes
Yes
Name
Configure memory The memory areas for message buffers, send triggers and
areas receive flags have been successfully configured through mes-
sage commands.
Configure one CAN One of the output message buffers or input message buffers
message has been successfully configured through message com-
mands.
Enable communica- CAN messaging has been successfully enabled with device
tions variables for CJ-series Units
Disable communica- CAN messaging has been disabled with device variables for
tions CJ-series Units
Bus-off CAN messaging has been transitioned to the bus off state, e.g.
a bus-error occurred.
2 Nomenclature and Installation
Description
The Unit executes start-up tests and ini-
tializes the CPU bus communications.
A start-up error was detected during start-
up tests or during the intialization of the
CPU communication bus.
The Unit started without start-up errors but
is not yet configured using message com-
mands.
The Unit has received the memory loca-
tions and a number of output and input
message buffers.
CAN messages can be sent and received
if the network is powered.
Units. In normal operating mode the Unit is
Description
2
2-11