Unit States - Omron CJ1W-CORT21 Operation Manual

2 Nomenclature and Installation
2-2-5

Unit States

The User Defined CAN Unit has several states. These states are visualized in the figure below. Events
will force the Unit to switch to a different state, these events can be user initialized or caused by system
behaviour (or error conditions detected in the system).
The different states are defined and described in the first table below. In the second table the events are
defined which will force the Unit into a different state. In normal operating mode the Unit is initialized,
and no start-up error occurrs. The states are refreshed during every Unit Cyclic refresh. Changed state
information is reflected as changes in device variables for CJ-series Units.
Yes
2-10
Power-on or Reset
Yes
Can bus power
fails
CAN bus off
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Start
ST1
Initialise hardware
and software
Startup error ? Yes
Fatal Error
No
ST3
No
Not
Configured
Memory Area
Configured ?
Yes
ST4
Unit configured
No
ST4
Enable CAN
communication
Yes
No
Can bus
powered?
Yes
Yes
ST5
Communicating
No
Disable CAN
communication
ST2