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Manual Documentation Number: ZPXXx-XXXXx-XR-0812
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 –
www.bb-elec.com
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 –
www.bb-europe.com
SY (Time before
Initialization) Command
<Networking & Security> SY
Command keeps a
communication channel open
as long as module transmits or
receives before the active
connection expires. It can be
used to reduce latency in a
query/response sequence and
should be set 100 ms longer than the delay between transmissions.
This command allows multiple Zlinx Modules to share a hopping channel for a given
amount of time after receiving data. By default, all packets include an RF initializer
that contains channel information used to synchronize any listening receivers to the
transmitter‟s hopping pattern. Once a new module comes within range, it is able to
instantly synchronize to the transmitter and start receiving data. If no new modules
are introduced into the system, the synchronization information becomes redundant
once modules have become synchronized.
SY Command allows the modules to remove this information from the RF Initializer
after the initial synchronization. For example, changing the SY Parameter to 0x14 (20
decimal) allows all modules to remain in sync for 2 seconds after the last data packet
was received. Synchronization information is not re-sent unless transmission stops for
more than 2 seconds. This command allows significant savings in packet
transmission time.
Warning: Not recommended for use in an interference-prone environment.
Interference can break up the session and the communications channel will
not be available again until SY time expires.
With SY set to zero, the channel session is opened and closed with each ransmission
– resulting in a more robust link with more latency.
TO (DO2 Timeout) Command
<Serial Interfacing>DO2 output
will return to default after no
DI2 status information is
received during the timeout
period.
Use with CS = 2 or 4.
AT Command: ATSY
Binary Command: 0x17 (23 decimal)
Parameter Range:
0
– 0xFF
[x 100 milliseconds]
Default Parameter Value: 0 (Disabled - channel
initialization info sent with each RF packet.)
Number of bytes returned: 1
AT Command: ATTO
Binary Command: 0x31 (49 decimal)
Parameter Range:
0
– 0xFFFF [x 1 second]
Default Parameter Value: 3
Number of bytes returned: 2
Minimum Firmware Version Required: 4.30
