Modem Compatibility and
Commands
The ML2430A Series Power Meter firmware supports Hayes-compatible mo
-
dems. The commands used are as follows:
Command Definition
+++ modem escape sequence
atz reset modem to factory defaults
at&h1&r2x4v1q0f1s0=1e0 initialize modem for power meter use
atd”number” dial “number”
Serial Interface
Remote Operation
Example
This section presents an example of Autodial using a terminal emulator on a re
-
mote computer ( \n = newline, \r = carriage return).
1.
Initialize local modem, using the same setup as the power meter:
at&h1&r2x4v1q0f1s0=1e0\r
&h1
transmit data flow control - use CTS
&r2
receive data flow control - use RTS
x4
full result code setting
v1
result codes in verbal mode
q0
result codes displayed
f1
local data echo OFF
s0=1
auto answer after 1 ring
e0
local command echo off
The modem should respond:
OK\n\r
2.
Dial power meter:
atd<phone number>\r
When the modem finally connects to the power meter modem, the response will be:
CONNECT\n\r
There might be additional information after “CONNECT” but before the line termination
characters.
3. The remote computer is now connected to the power meter. The power meter can now
be asked to identify itself:
*IDN?\n
The response from an ML2438A operating in native mode will be:
RANRITSU,ML2438A,<serial number>,<firmware version>
5-8 ML2430A OM
RS232 MODEM SUPPORT PROCEDURES
