Transitions Of Communications States - Omron SYSMAC FH Series User Manual

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Transitions of Communications States

The EtherCAT master controls the state transition model for communication control of its slave termi-
nals.
The following figure indicates the transition for the communication state since the power has been
turned ON.
The following table indicates whether or not data objects can be sent or received in each communica-
tion state.
Status
Init.
Pre-Operational (Pre-
Op)
Safe-Operational
(Safe-Op)
Operational (Op)
FH/FHV Series Vision System User's manual for Communication Settings (Z342-E1)
2 Methods for Connecting and Communicating with External Devices
Power supply ON
Init
Pre-Operational
Safe-Operational
Operational
SDO
Sending
commu-
PDOs
nications
Not possi- Not possi-
ble ble
Not possi-
Possible
ble
Possible Possible
Possible Possible
Receiv-
ing PDOs
Not possi- Communications is in initialization. Communica-
ble tions are not possible.
Only SDO (message) communications are pos-
Not possi- sible.
ble After the initialization, the network settings is ini-
tialized in this state.
Sending PDOs in addition to SDO (message)
Not possi- communications are possible in this state.
ble The slave terminals can send Information such
as status with sending PDOs.
Normal state in communications.
Possible The I/O data can be controlled with PDO com-
munications.
Description
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