Hitachi S10VE, User Manual

Page: 332 / 506

11. Operation
11-11
11.4.2 State transitions
Figure 11-10 contains the transition conditions of the various states described in Table 11-3, as well as the
combinations of the RUN LED, STBY LED, ERR LED, and ALARM LED in the various states.
The ERR LED being on indicates that a hardware or software error (such as a system watchdog timer
timeout) has occurred.
#1: If a major failure error is detected while the OS is running, the status of the RUN LED is held as the LED status
from before the error was detected.
#2: If a major failure error is detected in the firmware, the STB LED turns off.
If a major failure error is detected while the OS is running, the status of the STB LED is held as the LED status
from before the error was detected.
#3: When a minor failure occurs, the ALARM LED turns on and operation continues.
#4: If a system task error or software watchdog timer timeout error is detected, the status of the RUN LED is held as
the LED status from before the error was detected.
Figure 11-10 S10VE state transitions
(15) Power off from all states
2. Hardware initialization
RUN: OFF
ERR: OFF
STBY: B
ALARM: OFF/ON
#3
3. CPU STOP
RUN: OFF
ERR: OFF
STBY: ON
ALARM: OFF/ON
#3
(4) Transition from CPU STOP
to CPU RUN
6. OS initialization
RUN: B
ERR: OFF
STBY: B
ALARM: OFF/ON
#3
(6) Transition from CPU
RUN to CPU STOP
7. LADDER STOP
RUN: B
ERR: OFF
STBY: OFF
ALARM: OFF/ON
#3
5. Major failure error (CPU stop)
RUN: OFF
ERR: ON
STBY: OFF/ON/B
#2
ALARM: OFF/ON
#3
10. LADDER RUN
RUN: ON
ERR: OFF
STBY: OFF
ALARM: OFF/ON
#3
11. SIMU RUN
RUN: ON
ERR: OFF
STBY: OFF
ALARM: OFF/ON
#3
(7) OS initialization
complete
(8) Transition from
LADDER STOP to
LADDER RUN
(12) Transition from LADDER
RUN to LADDER STOP
(5) Major failure error occurrence
(core 0 detection to core 1 stop)
(5) Major failure error occurrence
(core 0 detection, core 1 operation)
(core 0 operation, core 1 detection)
(1) Power on
(13)
Transition
from
LADDER RUN to
SIMU RUN
(9) Transition from
LADDER STOP to
SIMU RUN
CPU RUN
LADDER RUN
1. Power supply off
RUN: OFF
ERR: OFF
STBY: OFF
ALARM: OFF
(5) Major failure error occurrence
(core 0 detection, core 1 operation)
(core 0 operation, core 1 detection)
LED status
ON: On, OFF: Off, B: Blinking
8. Major failure error (CPMS
operation in progress)
RUN: ON/B #1
ERR: ON
STBY: OFF/B
#2
ALARM: OFF/ON #3
(10) System task error, software watchdog
timer timeout error occurrence
(core 0 operation, core 1 detection)
9. System task error (CPMS
operation in progress)
RUN: ON/B
#4
ERR: ON
STBY: OFF
ALARM: OFF/ON
#3
(11) Major failure error
occurrence
(core 0 operation, core
1 detection)
(11) Major failure error occurrence
(core 0 operation, core 1 detection)
(11) Major failure error occurrence
(core 0 operation, core 1 detection)
(11) Major failure error occurrence
(core 0 operation, core 1 detection)
(3) Initialization
complete & CPU
RUN state
(14) Transition from SIMU RUN
to LADDER RUN
(10) System task error
Software watchdog timer
timeout error occurrence
(core 0 operation, core 1
detection)
(2) Initialization complete
& CPU STOP state