User's Manual

6-4 Troubleshooting
6-4
6-10
6-4-2 Check Items for Each Response Code
Response Code Primary check items
(Nonresponding
state)
・Are the communication conditions set for the host and the Reader/Writer matched?
Transmission rate, data length, stop bit length, parity (even, odd, none)
・Is the control code (STX/ETX) transmitted properly?
・Are the command node No. and Reader/Writer node No. setting matched?
・Is the Reader/Writer set to Offline mode?
・Is the command issued by the Reader/Writer executable in the state?
 Offline mode: Commands are not accepted.
Communication with the Tag in progress: Commands are not accepted.
FIFO mode: Only FIFO Access command is accepted. 
Select state: Only Tag Designation command is accepted.  
*Stop Command (ST) and Reset Command (XZ) are always executable.
・Is the command issued during the initialization (approximately 2.5 seconds) that follows
power ON or Reset Command execution?
“10”
“11”
“12”
・Are the communication conditions set for the host and the Reader/Writer matched?
Transmission rate, data length, stop bit length, parity (even, odd, none)
・Is there a noise source near the communication cables?
“13”
・Is the added BCC correct?
  Calculation method, Format (Binary,1byte)
“14”
・Is data for each command field correct?
  Communication method specified (Types, combination with the commands), specified data,
Tag types, page, written data
・Is the command executable with the Reader/Writer’s chip operating mode (I.CODE1/ISO)
settings?
・Is the simplified number already assigned using Tag designation command? [I.CODE1
Mode]
“18”
・Is the command to be issued correct?
・Is the control code (STX/ETX) transmitted correctly?
“70”
・Aren’t there multiple Tags present in the communication area? [In Single Access mode]
・Is there any antennas other than the one communicating, nearby?
・Are there any devices or cables that could be a source of noise nearby?
・Is the Tag in the stable communication area?
・Does the Tag stay for a short time in the communication area? (Is it moving fast enough?)
・Is the specified page within the Tag’s memory range?
・Does the Reader/Writer support the Tag?
“71”
・Is the Tag re-written exceeding its rewrite cycle?
・Is the write target page locked? [In ICODE1 Mode]
・Does the Reader/Writer support the Tag?
“72”
・Is the communication distance between the antenna and Tag appropriate?
・Are there multiple Tags present in the communication area?
・Are chip operating mode and the type of Tag used matched?
・Does the Reader/Writer support the Tag?
“79”
・Is the specified page within the Tag’s memory range? [ISO mode - I.CODE SLI]
・Is the write target page locked? [ISO Mode - I.CODE SLI]
“7A” ・Is the specified page within the Tag’s memory range? [ISO mode]
“7C” ・If this occurs continuously, the Reader/Writer may fail.
“7E” ・Is the specified page locked? [ISO Mode]
（“IC”） ・The command code for the command is incorrect.