21
May ’00
Chapter 2. Commands
Reader --> PC:
<CR><LF>
2.3.8
SET CHARGE PERIOD Command
The charge-up period to charge-up a transponder can be set in steps of 1 ms in the
range: 15 ms to 255 ms.
The ASCII character Z and two further ASCII characters (in the range of 0 to 9 and
A to F) specify the charge period. This hexadecimal number is translated into an ac-
tual time (for example: 32 = 50 ms, 64 = 100 ms and C8 = 200 ms), which will cause
the TIRIS reader to change the charge period. This new charge period is valid until
the TIRIS reader is either reset or powered-up again. The default charge period can
be set using the configuration utility software, but the charge period can still be mod-
ified using this command.
If you try to set the charge period at less than 15 ms, the current charge period will
not be changed.
Example
Comment
PC --> Reader:
Z
Reader --> PC:
Z
PC --> Reader:
20
Set charge period to 32 ms
20
hex
= 32
dec
Reader --> PC:
<CR><LF>
Note:
The result of the logical operation depends on the configuration of the
I/O 0...7. The TIRIS reader is preconfigured to:
I/O 0...3
INPUT
I/O 4...7
OUTPUT
all set to 1
This configuration can be changed, using the TIRIS Reader Manager.
Note:
Changing the charge period has a great influence on the synchroniza-
tion with other readers.
All Readers which should be synchronized must be configured with
the same charge period.
The TIRIS reader is preconfigured to 50 ms charge period.
