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Section 5 Command Format
RFID System
Operation Manual
Section 5
Communications
Command List
There are four major groups of commands.
■ Communications Commands
Communications Commands perform communications with Data Carriers.
■ General Communications Subcommands
These subcommands are used to cancel or abort command execution.
Command code Name Description
More informa-
tion
RD READ Reads Data Carrier memory. p.82
WT WRITE Writes Data Carrier memory. p.84
XR EXPANSION READ Reads up to 2 KB of Data Carrier memory data by dividing the data into frames. p.86
XW EXPANSION WRITE Writes up to 2 KB of Data Carrier memory data by dividing the data into frames. p.89
ER EXPANDED READ Reads up to 8 KB of Data Carrier memory data. p.93
AR AUTO READ Waits for a Data Carrier to approach and then reads Data Carrier memory. p.95
AW AUTO WRITE Waits for a Data Carrier to approach and then writes Data Carrier memory. p.97
DF DATA FILL Fills Data Carrier memory with the specified number of write bytes from the start
write address specified in the command.
p.99
AF AUTO DATA FILL Waits for a Data Carrier to approach and then writes the specified number of
bytes of the specified data from the start write address specified in the command
to Data Carrier memory.
p.102
CP COPY Writes data read from Data Carrier memory by one Read/Write Head to the
memory of a Data Carrier in the communications area of the other Read/Write
Head.
p.104
AP AUTO COPY Waits until a Data Carrier approaches and then Writes data read from Data Car-
rier memory by one Read/Write Head to the memory of a Data Carrier in the
communications area of the other Read/Write Head.
p.106
PR POLLING AUTO READ Waits for a Data Carrier to approach and then reads Data Carrier memory. Com-
mand processing results can be checked using a subcommand.
p.108
PW POLLING AUTO WRITE Waits for a Data Carrier to approach and then writes Data Carrier memory. Com-
mand processing results can be checked using a subcommand.
p.112
MDC/MDK MANAGEMENT DATA
CHECK and MANAGE-
MENT DATA CALCULATE
Used to calculate and verify check codes in Data Carrier memory. Writes the cal-
culation result to Data Carrier memory. p.116
MDS/MDL MANAGEMENT DATA
SUBTRACTION and
MANAGEMENT DATA
LIMIT
Used to manage the number of times memory in a Data Carrier without a battery
is overwritten.
p.118
RP WRITE REPEAT Executes the most recently executed Write Command. p.120
Command
code
Name Description
More informa-
tion
AA COMMAND PROCESS-
ING TERMINATE
Terminates communications with the Data Carrier.
p.122
XZ ABORT Restores the initialization status of ID Controller, i.e., the status immediately after
power is turned ON. No response will be returned. Do not use the abort command
while communicating with a Data Carrier.
p.124