XIB-E【PDF 26/64 页】BOARD INTERFACE ETHERNET

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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).

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)

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 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

AT Command: ATID

Binary Command: 0x27 (39 decimal)

<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.

Parameter Range (user-settable):

0x10 - 0x7FFFF

(Factory-set and read-only) :

0x8000 0xFFFF

Number of bytes returned: 2

Minimum Firmware Version Required: 4.2B

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(previous firmware versions did not support

user-settable IDs.)

IU (DI2, DI3 Update Timer) Command

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

<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.

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