State Transition - Renesas RA6T2 Application Note

Sensorless vector control for permanent magnetic
synchronous motor - 1shunt current detection

3.1.4 State transition

Figure 3-1 is a state transition diagram of the sensorless vector control software. In the target software of
this application note, the software state is managed by "SYSTEM MODE". Motor 1 and 2 are controlled in the
same method.
Figure 3-1 State Transition Diagram of Sensorless Vector Control Software
(1). SYSTEM MODE
"SYSTEM MODE" indicates the operating states of the system. The state transits on occurrence of
each event (EVENT). "SYSTEM MODE" has 3 states that are motor drive stop (INACTIVE), motor drive
(ACTIVE), and abnormal condition (ERROR).
(2). EVENT
When "EVENT" occurs in each "SYSTEM MODE", "SYSTEM MODE" changes as shown the table in
Table 3-4, according to that "EVENT". The occurrence factors of each event are shown below.
Table 3-4 List of EVENT
EVENT name
STOP
RUN
ERROR
RESET
R01AN6840EJ0100 Rev.1.00
May 23, 2023
SYSTEM MODE
STOP
[ERROR EVENT]
[RESET EVENT]
[ERROR EVENT]
ERROR
STOP
STOP
STOP
RUN
RUN
EVENT
ERROR
ERROR
RESET
STOP
occurrence factor
by user operation
by user operation
when the system detects an error
by user operation
For Renesas Flexible Motor Control Series
POWER ON/
RESET
[RUN EVENT]
[STOP EVENT]
RUN
MODE
RUN ERROR
ERROR
STOP
ERROR
RUN
ERROR
ERROR
RUN
STOP
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