Omron C200H-ASC11, Manual, Page: 260 / 301

251
Troubleshooting
Section 9-2
Note The following flowchart shows the BASIC indicator during normal operation.
9-2-1 Procedure for Dealing with Damage to the Program Memory
1,2,3... 1. Turn OFF the power supply to the PC and remove the ASCII Unit from the
Backplane.
2. Set the user memory default switch on the back panel of the ASCII Unit to
the right (ON) and attach the ASCII Unit to the Backplane.
3. Turn ON the power supply to the PC and check that all the indicators on
the ASCII Unit are flashing (except T/R). The CPU Unit is now ready for
operation. if the DM setting is set to automatically read the flash ROM at
startup (DM bits 8 to 15: 5A), set to 0 (flash ROM not automatically read).
(If the indicators are not flashing, replace the Unit.)
4. After checking that all the indicators are flashing, turn OFF the power sup-
ply to the PC and remove the ASCII Unit from the Backplane.
5. Set the user memory default switch on the back panel of the ASCII Unit to
the left (OFF), and attach the ASCII Unit to the Backplane.
6. Turn the power to the PC ON, and check that the RUN indicator is lit. (If the
RUN indicator is not lit, replace the Unit.)
7. Since the program memory is now set to default (all clear), programs need
to be transferred once more to RAM (by setting DM bits 8 to 15 to 5A, so
that flash ROM is read automatically at startup, etc.).
Note When performing the above procedure, make sure that the DM setting for
automatically reading the flash ROM at startup is not set to read (bits 8 to 15:
00). If the setting is already set to automatic (bits 8 to 15: 5A), set to 0 and
then perform the procedure.
Normal operation
BASIC indicator (green)
Lit
Not lit Flashing
BASIC program is stopped.
BASIC program is being executed. Quick flashing Slow flashing
Waiting for transfer of
BASIC program.
Waiting for INPUT command, or
waiting for PRINT command, or
waiting for command input (in
command mode).