Manual Documentation Number: ZPXXx-XXXXx-MR-0812
39
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IU (DI2, DI3 Update Timer)
Command
<Serial Interfacing> Set/Read
the interval at which the status
of DI2, DI3 and Break is
transmitted. Additionally, status
is transmitted whenever there is
a transition. A setting of “0”
disables periodic update. DI2 or
DI3 passing must be enabled
for the update to take place.
LH (Wake-up Initializer Timer)
Command
<Sleep (Low Power)> Set/Read
the amount of time during which
the RF initializer is sent. When
receiving modules are put into
Cyclic Sleep Mode, they power-
down after a period of inactivity
[specified by ST (Time before
Sleep) Command] and will
periodically awaken and listen
for transmitted data. In order for
the receiving modules to remain
awake, they must detect ~35ms of the wake-up initializer.
LH Command must be used whenever a receiver is operating in Cyclic Sleep Mode.
This lengthens the Wake-up Initializer to a specific amount of time (in tenths of a
second). The Wake-up Initializer Time must be longer than the cyclic sleep time that
is determined by SM (Sleep Mode) Command. If the wake-up initializer time were less
than the Cyclic Sleep interval, the connection would be at risk of missing the wake-up
initializer transmission.
AT Command: ATIU
Binary Command: 0x3B (59 decimal)
Parameter Range: 0 - 0xFFFF [x 100 ms]
Default Parameter Value: 0x0A (10 decimal)
Number of bytes returned: 2
Related Commands: BK (Serial Break Passing),
BO (Serial Break Timeout), CO (DO3 Timeout),
DR (Disconnect), RT (DI2 Configuration), TO
(DO2 Timeout)
Minimum Firmware Version Required: 4.30
AT Command: ATLH
Binary Command: 0x0C (12 decimal)
Parameter Range:
0
– 0xFF
[x 100 milliseconds]
Default Parameter Value: 1
Number of bytes returned: 1
Related Commands: HT (Time before Wake-up
Initializer), SM (Sleep Mode), ST (Time before
Sleep)
Refer to the figures in the Sleep Mode sections to view correct and
incorrect configuration diagrams. The images help visualize the importance
that the LH value be greater than the SM cyclic sleep value.
