Omega Engineering OMA-D560, Руководство пользователя

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OMEGA ENGINEERING, INC.
„ Open Communications Gateway
Type COM R at the command prompt and the OMA-D560 system will open a communications path between
the modem and its serial port. This path can be used to establish communications with a secondary OMA-D560
system or almost any other device that has an RS-232 port.
When using the communications gateway, make sure that the RS-232 cable connecting the OMA-D560 system
and secondary device supports full hardware (RTS/CTS) handshaking. If the secondary device does not
support hardware handshaking, you must make sure that neither device transmits more data than the receiver
can handle.
For example: If you have a OMA-D560 system operating its modem at 33.6 kbps and its RS-232 at 115 kbps
you must make sure that the device attached to the RS-232 port does not transmit data at a sustained rate of
115kbps. Because the OMA-D560 system would be receiving data 3.5 times faster than it can send it, the
receive buffer will fill up quickly. The OMA-D560 can buffer up to 256 incoming and outgoing bytes but any
data received after a buffer has filled up will be lost.
*Note: If you attach a device that continuously generates data to the OMA-D560 RS-232 port, you must enable
the smart gateway option. (See COM S).
COMMAND>COM R
Connecting modem to RS232 port.
Two seconds of silence followed by Ctrl-D will
close gateway.
„ Communications Gateway Set-up
Type COM S at the command prompt and the OMA-D560 system will display a sub-menu of
related parameters that you can alter.
COMMAND>COM O
1 = Baud Rate
2 = Gateway Echo On/Off
0 = Previous Menu
Choose a Number>1
SET/CHECK BAUD RATE
--------- ---- ----
Present Value: 4800
1 = 300 baud
2 = 1200 baud
3 = 2400 baud
4 = 4800 baud
0 = Previous Menu
Choose a Number>