SV-iS7 CANopen Manual
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4.2.5 The frames enabling communication by NMT status
Pre-operational
Operational
Stopped
PDO -
O
-
SDO O
O
-
SYNC O
O
-
TIME O
O
-
EMCY O
O
-
Node control and
error control
O O O
* “O” mark indicates communication enabled.
4.3 Error
Control
Protocols
These protocols are used to check normal operation of the device.
Two methods are available in the CANopen; Protocol node guarding and Protocol heartbeat.
4.3.1 Protocol
node
guarding
Master inquires the Slave for normal operation via the RTR Frame, and the Slave returns the current NMT State
to the Master.
The NMT status of the Slave is indicated by the value of S;
-. 4: Stopped
-. 5: Operational
-. 127: Pre-operational