Encompass 4 Reader System Guide
7-40
Reader response:
Done
#648NN Set Synchronization Output Delay Time
Command #648NN sets the time in milliseconds by which the reader is delayed before
sending a synchronization pulse on the RS–485 synchronization bus to all other read
-
ers connected on the bus. Entering a value of #64800 (factory default) disables this
feature. Entering #64801 through #648FF sets the reader countdown time from 1 and
255 milliseconds. If the reader gets a pulse from another reader before its own time
period expires, it first executes all of the enabled tag protocols, then restarts its count
-
down timer. The reader on the bus with the smallest entered value becomes the master
and all readers with a larger entered number become slaves. Any reader on the bus can
become the master. The master does not necessarily have to be on one of the ends of
the synchronization bus, but the installer must exercise caution to ensure that every
reader on the bus has a different value.
When the master sends out the synchronization pulse all of the connected readers
begin the RF tag protocol transactions that have been enabled. This synchronization
. .
6470EA 918.50
6470EB 918.75
6470EC 919.00
6470ED 919.25
6470EE 919.50
6470EF 919.75
. .
. .
.
657113 928.75
647114 929.00
647115 929.25
647116 929.50
647117 929.75
647118 930.00
Table 7-16 Select RF Operating Frequency Commands (continued)
Command RF Frequency (MHz)
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