Operation
Executing a command and calling data
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9 Operation
NOTE
The read and write data stored in the module is reset after a power reset.
9.1 Executing a command and calling data
NOTE
A command is successful when the response code is the same as the command
code.
Set the parameters for the command.
Set command code.
a Set the command code. The command is successful when the response code is the same
as the command code and no error message is present.
9.1.1 Typical times for command processing via a controller
The values shown in the following table are approximate values. The typical times for com-
mand execution depend on the following factors:
n Hardware configuration
n Software configuration
n Number of bus stations
n Bus cycle times
HF applications
Command System cycle time Required time Dependence on factors such as
protocol, system etc.
Read 8 bytes 4 ms 10 ms ≤ 20 %
Write 8 bytes 4 ms 10 ms ≤ 20 %
Read 8 bytes 20 ms 60 ms ≤ 20 %
Write 8 bytes 20 ms 60 ms ≤ 20 %
Read 128 bytes 4 ms 40 ms ≤ 20 %
Write 128 bytes 4 ms 50 ms ≤ 20 %
Read 1 kByte 4 ms 700 ms ≤ 20 %
Write 1 kByte 4 ms 800 ms ≤ 20 %
Inventory (4 tags) 4 ms 300 ms ≤ 10 %