MDS MDS 9710 Series Specifikace stáhnout pdf (Strana 29)

MDS 05-3305A01, Rev. D MDS 4710/9710 I/O Guide 21

BAUD [xxxxx abc]

Data Interface Port

Baud Rate

This command sets (or displays) the communication attributes for the

DATA INTERFACE port. It has no effect on the RJ-11 DIAG. port.

The first parameter (

xxxxx) is baud rate. Baud rate is specified in

bits-per-second (bps) and must be set to one of the following speeds:

1200, 2400, 4800, 9600, or 19200.

The second parameter of the

BAUD command (abc) is a three-character

block indicating how the data is encoded:

a = Data bits (7 or 8)

b = Parity (N for None, O for Odd, E for Even)

c = Stop bits (1 or 2)

The factory default setting is 9600 baud, 8 data bits, no parity, 1 stop bit

(Example:

9600 8N1).

NOTE: 7N1, 8O2, and 8E2 are invalid communication settings and are

not supported by the transceiver.

BUFF [ON, OFF] [xxx]

RX Data Buffer This command sets or displays the received data handling mode of the

radio. The command parameter is either

ON or OFF. The default is ON.

This command affects the timing of how received RF data is sent out

from the

DATA INTERFACE connector. Outgoing (transmitted) data is not

affected by this command.

If data buffering is

OFF, the radio operates with the lowest possible

average latency. Data bytes are thus sent out the

DATA INTERFACE port

as soon as an incoming RF data frame is disassembled. Average and typ-

ical latency will both be below 10 ms, but idle character gaps might be

introduced into the outgoing data flow.

If data buffering is

ON, the radio operates in Seamless Mode. Data bytes

will be sent over the air as quickly as possible, but the receiver buffers

(stores) the data until enough bytes have arrived to cover worst-case

gaps in transmission. This mode of operation is required for protocols

such as MODBUS™ that do not allow gaps in their data transmission.

Note that Seamless Mode (

BUFF ON) is intended only for applications

where the transmitter’s baud rate is greater than or equal to the

receiver’s baud rate. Enforcement of this rule is left up to the user.

In some rare cases, the default timing parameters for Seamless Mode are

not optimal. In these cases, the user might need to specify an exact delay

time. To set a custom delay time, enter

BUFF xxx (xxx is a value between

1 and 255). Entering

BUFF xxx resets the default delay time.

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 57 58

Komentáře k této Příručce

Žádné komentáře

MDS MDS 9710 Series Specifikace Strana 29

Komentáře k této Příručce