Digi 9XCite-PKG Manuel télécharger pdf (Page 25)

9XCite‐PKG‐R™RS‐232/485RFModem–ProductManualv2.1[2007.01.04]

©2007MaxStream,Inc. 25

CS (DO2 Configuration) Command

<AT Command: Serial Interfacing> CS Command

is used to modify the behavior of the CTS

signal

such that it either provides RS-232 flow control,

enables RS-485 transmission / reception or deter-

mines RS-422 transmit enable. By default, CTS

provides RS-232 flow control. CS Parameter must

be adjusted for the modem to operate in RS-485/

422 environments.

CT (Time before Exit AT Command Mode) Parameter

<Non-AT Settable Parameter: AT Command Options> AT Command Mode can be exited manually

using CN (Exit AT Command Mode) Command or, after a given time of inactivity, the modem exits

AT Command Mode on its own and return to Idle Mode. CT Command sets the amount of time

before AT Command Mode is exited automatically. If no characters are received before this time

elapses, the modem will return to Idle Mode.

Parameter Range: 0x02 - 0xFFFF [x 100 ms]

# of bytes returned: 2

Default Parameter Value: 0xC8 (200d (20 decimal seconds))

DB (Receive Signal Strength) Command

<AT Command: Diagnostic> DB Parameter returns the receive signal strength (in decibels) of the

last received packet. This Parameter is useful in determining range characteristics of the XCite

Modules under various conditions.

AT Command: DB

Parameter Range: 0x25 - 0x6A [Read-only]

# of bytes returned: 1

DT (Destination Address) Command

<AT Command: Networking> DT Command is used to set the address of the XCite Radio Modem.

XCite Radio Modems use three network layers - the Vendor Identification Number (ATID), Chan-

nels (ATHP) and Destination Addresses (ATDT).

DT Command assigns an address to a radio modem that enables it to communicate only with radio

modems that have matching addresses. This is similar to interconnecting several PCs under a

common hub. All radio modems that share the same destination address can communicate freely

with each other. Radio Modems in the same network with a different destination address (than that

of the transmitter) will listen to all transmissions to stay synchronized, but will not send any of the

data out their serial ports.

AT Command: DT

Parameter Range: 0 - 0xFFFF

# of bytes returned: 2

Default Parameter Value: 0

Related Commands: ID (Modem ID), HP (Channel), MK (Address Mask)

AT Command: ATCS

Parameter Ranges: 0 - 4

Parameter Configuration

0Normal CTS

1 RS-485 enable (low)

2high

3 RS-485 enable (high)

4low

Default Parameter Value: 0

Number of bytes returned: 1

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 38 39

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Digi 9XCite-PKG Manuel Page 25

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Produits connexes et manuels pour Modems à radiofréquence (RF) Digi 9XCite-PKG