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9.2 CANopen Communication
9-35
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Chap 9
(3) State Machine
To run the inverter, operate the state machine (state transition diagram) defined with DSP 402. The state of the
state machine is changed by Controlword (CTW in the figure) and the state is monitored by Statusword (STW in
the figure). The Figure 9.2-3 shows the state machine and the Table 9.2-18 shows the commands to the inverter
during each state transition.
The inverter enters into running state by putting the state machine in the state 5 “Operation enabled” in
the Table 9.2-18.
Start
1. Not Ready to switch on
STW = x00x 0000
2. Switch on disabled
STW = x10x 0000
3. Ready to switch on
STW = x01x 0001
4. Switched on
STW = x01x 0011
5. Operation enabled
STW = x01x 0111
6. Quick stop active
STW = x00x 0111
8. Fault
STW = x00x 1000
7.Fault reaction active
STW = x0xx 1111
Every state
12
13 Alarm occur
Trip cleared
or
CTW = 1xxx xxxx
15
10
7
2
6
3
5
4
8
9
11
Internal initialization finished
1
CTW=0xxx x110
CTW=0xxx x111
CTW=0xxx 1111
CTW=0xxx 0111
CTW=0xxx x110
CTW=0xxx 0110
CTW=0xxx 0000
CTW=0xxx xx0x
or
CTW=0xxx x0xx
Output shut off
or
CTW = 0xxx x00x
CTW=0xxx x01x
Caution:
Since upper bytes of CTW and
STW are independent of state
machine, the description is omitted
1: True, 0: False, x: Don't care
Output shut off (trip)
14
CTW=0xxx xx0x
or
CTW=0xxx x0xx
Figure 9.2-3 State Machine
Table 9.2-18 Correspondence of the States of State Machine and Inverter
State No.
Name
State of inverter
1
Not Ready to switch on
Initializing the CANopen
2
Switch on disabled
Inverter’s alarm cleared
3
Ready to switch on
Inverter output shut off
4
Switched on
Inverter stopped (running command OFF)
5
Operation enabled
Inverter running (running command ON)
6
Quick stop active
Inverter stopped urgently (for the time set in Index 604A)
7
Fault reaction active
Alarm detected
8
Fault
Inverter tripping
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