User's Manual

6-1 Error Types and Diagnostic Functions
6-1
6-2
The Reader/Writer performs a variety of self-diagnostic functions to reduce system downtime in case of an
error. The errors detected by the Reader/Writer are categorized into fatal errors and nonfatal errors.
Fatal Error If the Reader/Writer main unit or hardware fails, the CPU operation is interrupted and the
ERROR LED is turned on or flashed.
 ●CPU error
  Detects the CPU operation error using the watch dog timer (W.D.T.)
 ●Memory error
  Checks if data is read from or written onto the internal memory normally when the power is on.
Nonfatal error When an error occurs during communications between the Reader/Writer and the host, or the
antenna and Tag, the ERROR LED is turned on.
● Communication error
Checks for the errors in the communication processing sequence, frame, check code, and data at the execution of a command. The
error code corresponding to each error, is returned to the host as the response. (Error code:1□ )
● Host communication error
Checks for the errors in the communication processing sequence of the command data, frame, check code, and data at the reception
of a command. The error code corresponding to each error is returned to the host as the response. (Error code:7□ )
● System error
Checks that the command processing functions (EEPROM, communication circuit, etc.) are normal at the execution of a command.
The error code corresponding to each error is returned to the host as the response. If the error occurs repeatedly, the device needs
repair. (Error code:7C, 93)
● Set value error
Checks that set data concerning the operating environment on the EEPROM in the main unit is not corrupted.. Checks for errors at
power on, and if the error(s) are detected, operates in Online Mode with the factory default settings. The operating environment is
regained by setting the operating conditions once again.
■ LED states in each condition
Indicator
Item
RUN COMM NORM ERROR
Awaiting command
○ ● ● ●
Communicating with Tag/ Offline mode
○
○ ／
● ●
Normal operation
Normal completion of communications with Tag
○ ● ○ ●
CPU error
● ● ● ○
Fatal error
Memory error
● ● ●
Communications error
○ ● ● ○
Host communications error
○ ● ● ○
System error
○ ● ● ○
Nonfatal error
Setting error※
○ ● ●
○ ：ON, ● ：OFF,
：Flashing
* The LED-lit state for the set value error is retained until the next command has been executed.
: During the communication with Tags in Online Mode, the COMM LED is lit in the software versions 1.20 and higher, or
flashes in versions 1.10 and lower.