Manual Documentation Number: MDRxxxxA-807
23
Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com -- Tech Support and Ordering: 724-746-5500 - Fax: 724-746-0746
GD (Receive Good Count)
Command
<Diagnostics> Set/Read the
count of good received RF
packets. Parameter value is
reset to 0 after every reset and
is not non-volatile (value does
not persist in the module’s
memory after a power-up
sequence). Once the “Receive
Good Count” reaches its maximum value (up to 0xFFFF), it remains at its maximum
count value until the maximum count value is manually changed or the module is
reset.
HP (Hopping Channel)
Command
<Networking & Security> HP
Command is used to set the
module hopping channel
number. A channel is one of
three layers of addressing
available to the module. In order
for modules to communicate
with each other, the modules
must have the same channel number since each network uses a different hopping
sequence. Different channels can be used to prevent modules in one network from
listening to transmissions of another.
HT (Time before Wake-up
Initializer) Command
<Sleep (Low Power)> If any
modules within range are
running in a “Cyclic Sleep”
setting, a wake-up initializer
must be used by the
transmitting module for sleeping
modules to remain awake [refer
to the LH (“Wake-up Initializer
Timer”) Command]. When a
receiving module in Cyclic Sleep
wakes, it must detect the
wake-up initializer in order to remain awake and receive data. The value of HT
Parameter tells the transmitter, “After a period of inactivity (no transmitting or
receiving) lasting HT amount of time, send a long wake-up initializer”. HT
Parameter should be set to match the inactivity timeout [specified by ST (Time before
Sleep) Command] used by the receiver(s).
From the receiving module perspective, after HT time elapses and the inactivity
timeout (ST command) is met, the receiver goes into cyclic sleep. In cyclic sleep, the
receiver wakes once per sleep interval to check for a wake-up initializer. When a
wake-up initializer is detected, the module will stay awake to receive data. The wake-
up initializer must be longer than the cyclic sleep interval to ensure that sleeping
modules detect incoming data. When HT time elapses, the transmitter then knows
AT Command: ATGD
Binary Command: 0x10 (16 decimal)
Parameter Range:
0 – 0xFFFF
Default Parameter Value: 0
Number of bytes returned: 2
Related Commands: ER (Receive Error Count)
AT Command: ATHP
Binary Command: 0x11 (17 decimal)
Parameter Range:
0 – 6
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: DT (Destination Address),
ID (Module VID), MK (Address Mask)
AT Command: ATHT
Binary Command: 0x03 (3 decimal)
Parameter Range:
0 – 0xFFFF
[x 100 milliseconds]
Default Parameter Value: 0xFFFF (means that
long wake-up initializer will not be sent)
Number of bytes returned: 2
Related Commands: LH (Wake-up Initializer
Timer), SM (Sleep Mode), ST (Time before
Sleep)
24
Manual Documentation Number: MDRxxxxA-807
Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com -- Tech Support and Ordering: 724-746-5500 - Fax: 724-746-0746
that it needs to send a long Wake-up Initializer for all receivers to be able to remain
awake and receive the next transmission. Matching HT to the time specified by ST on
the receiving module guarantees that all receivers will detect the next transmission.
ID (Modem VID) Command
<Networking & Security>
Set/Read the VID (Vendor
Identification Number). Only
modules with matching VIDs
can communicate with each
other. Modules with non-
matching VIDs will not receive
unintended data transmission.
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
AT Command: ATID
Binary Command: 0x27 (39 decimal)
Parameter Range (user-settable):
0x10 - 0x7FFFF
(Factory-set and read-only):
0x8000 – 0xFFFF
Number of bytes returned: 2
Minimum Firmware Version Required: 4.2B
(previous firmware versions did not support user-
settable IDs.)
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
