Toshiba T2N - Manual (Page 114)

2.INTERNAL OPERATIONS
User’s manual 101
The T2N operation mode is selected according to the status of the mode switch
on the CPU module and mode change requests from the peripherals
(programmer,computer link,data transmission system).
The T2N operation mode is basically divided into three, the RUN mode, the HALT
mode and the ERROR mode. The ERROR mode is when diagnostic checks
conclude that normal operation can not continue.
The figure below shows basic mode transition. Also, within the RUN mode, other
than the usual RUN mode, there are also RUN-F, HOLD and DEBUG modes
mainly for debugging.
2.3
Mode Control
RUN mode
Mode change request
by operation mode switch
Mode change request
by programmer peripherals
HALT mode
RUN mode
RUN-F mode
HOLD mode
DEBUG mode
ERROR mode Result of self diagnostics