TransCore MPRX Series - Table 17 Unique ID Code Criteria

q current status of input0 and input1 (0 to 3)
sss relative to tag read strength
Reader response: #Done
ID Filtering — Command Group 4
Group 4 commands set criteria for filtering (buering or discarding) ID codes. These commands are useful
for eliminating duplicate ID codes and selecting the type of tags read by the MPRX.
40 Transmit All ID Codes
#40 instructs the reader to transmit all IDs without regard for uniqueness. This command
can be useful when tuning the read zone and mapping the footprint or performing
diagnostics.
After diagnostics are complete, you may want to reinstate the uniqueness check using
Command #410N Select Unique ID Code Criteria.
Reader response: #Done
410N Select Unique ID Code Criteria (Anti-passback Feature)
#410N instructs the reader to buer and transmit ID codes according to the following test: an
ID is read if previously decoded IDs have changed value at least N+1 times since the
new ID was last received. IDs that do not pass the test are not reported. The factory-
default setting is Command #4100, which selects a separation of one ID. Variable N
specifies ID separation as shown in Table 17.
Table 17 Unique ID Code Criteria
Command Uniqueness Criteria
4100
Separation of 1 ID (factory default)
4101
Separation of 2 IDs
4102
Separation of 3 IDs
4103
Separation of 4 IDs
Each time the reader receives a tag ID, it compares the ID with the contents of a
comparison register. This register contains the following two items:
Item 1 Most recently acquired ID
Item 2 Second-most recently acquired ID
Item 3 Third-most recently acquired ID
Item 4 Fourth-most recently acquired ID
When the uniqueness filter is set to separation of one ID, the newly acquired ID
is transmitted only if it is dierent from the first item. Separation of two IDs allows
transmission if the new ID is dierent from Items 1 and 2 in the comparison register.
Chapter 5 Commands
TransCore Proprietary
5–63