User Manual

Textile L100 Reader User's Guide
24/48 Revision 3.5 December 2007
In particular, the following parameters are defined by the multiplexing mode:
• the transmitting antennas,
• the phase shift between the antennas,
• which antenna is read, and for how long.
Multiplexing information is organized into patterns. A sequence contains between one and eight
patterns that are applied one after the other in a loop. The TR-L100 Reader can only store a single
sequence.
Figure 5: Sequence of Patterns in a Loop
Pattern 1 Pattern 2 Pattern 3 ...Pattern n
If n
p
atterns are defined
Multiplexing mode enables the user to implement several combinations on the basis of this
physical configuration.
Phase shifts can be used to detect tags in a 3-D rotating field application. Phase shifts of 0° and
180° are available.
In this case, both antennas must be enabled (transmitting) simultaneously in order for the two
phases to create a 3-dimensional RF field. For more information, refer to Appendix A: "Pattern
Examples".
7.1.4 Communication Parameters
Standard communication speed parameters are available. 4800, 9600, 19200 or 38400 bauds can
be selected.
Other parameters are set to their standard values: no parity, 1 stop bit and 8-bit characters.
7.2 Message Format
The format of the ASCII message used in Standalone mode can also be defined. The Header and
Trailer strings are optional, as is the Antenna (RF channel) and its separator string. If Tag ID is
selected, the number of characters to be displayed must be entered (in bytes).
A Checksum is also available to verify the validity of the data.
Messages are sent in frames with the elements shown in Figure 6. The elements sent in the
message can be individually selected.
Figure 6: Message Format
Header Ant. No. + Separator Tag ID Separator + CRC
Trailer
The Header can contain from 1 to 16 characters or be absent. Note that the both the Header and
the Trailer are either absent or present simultaneously.
The Antenna Number is either 1 or 2. This Separator can contain between 1 and 16 characters.
The Tag ID field contains the tag ID for C210, C220 and C270 tags. This field can contain 1 to 16
characters and the repetition of characters is configurable.
The second Separator can contain between 1 and 16 characters. The CRC field is the XOR of the
sum of all the characters (in hexadecimal format) included in the message. This value is
represented by two ASCII characters.
The Trailer can contain from 1 to 16 characters or be absent.