FM-ONE
HOKUTO DENSHI
CO;LTD;
株式会社
23
Troubleshooting
Items to be confirmed at errors
State of Cable & Power supply
While operating, there may be a loose connection or breaking, so confirm if the cable is properly connected. Also, when the
FM-ONE body is turned OFF, or some trouble occurs while operation in MCU, make sure that power is properly supplied to the
body and the board. In particular, when using the system with batteries, be sure to replace with new ones in case they drain.
Maximum length of the attachment of the target table is 30cm and if it is too long, it may result in a harmful effect.
Setting of transmission rate
Transmission rate varies depending on the target board clock. For the transmission rates, refer to the ROM chapter of the
Hardware Manual. Transmission by the writing control program, or User program with a built-in ROM deleted, the maximum
transmission rate must be set considering the serial communication error rate. The communication error rate should be
adjusted by changing the combinations of rates. (For selectable rates, refer to the Bit rate register section of the Serial
Communication chapter, the Hardware Manual.)
Various types of setting
Confirm how MCU selection and Pin setting are done. When this system is used by reinstalling or in a different
environment, the pin setting may remain the
default value and the boot mode does not start readily. For detailed pin
setting, refer to the Boot mode timing chart section.
State of MCU
The more the frequency of writing becomes, the more frequency of delete and retry of program writing becomes, and
consequently time required for writing is longer. When a socket is applied to the target, be sure that there is no loose
connection.
Target circuit
On the assumption of Open Collector drive, RESET is output from FM-ONE. A delayed or slow output causes a startup error.
The description of the main body and points to remember of the reference circuit diagram are shown in the beginning of the
User
’s guide of the User’s Manual. Read them when examining output waveform.
Programs
Make sure whether reduplicated addresses are in the MOT/HEX file or not, or writing is designated at any area other than
built-in ROM area. Bear in mind that file extension is possible only on .MOT/HEX file and make sure file formats as well.