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2.4 Teleservice via PC
A Mitsubishi Alarm Modem can be used to handle the remote maintenance of
several controllersvia atelephone line.This isusually possible withthe program
-
ming software in use. The variables and I/O ports of the PLC can also be read or
written remotely online with the Mitsubishi Alarm Editor (MX-AME). The entire
configuration of theMitsubishi Alarm Modem can becarried out by remote dial-in
and the logged data can be read “manually".
Secure Login
Optimum security is ensured since unauthorized dial-in attempts are prevented by means of a
login procedure with user name and password. All dial-in and dial-in attempts are recorded.
2.5 Pump alarm application example
The following example shows how you can use the wide range of functions of the Mitsubishi
Alarm Modem to handle complex tasks automatically:
Pump alarm:
ቢ
Send an e-mail, a fax and an SMS to three different destinations
if input X0 on the PLC closes.
ባ
Wait ten minutes for a confirmation via SMS.
Service technicians can query status values by SMS (or dial-in and PC).
ቤ
Wait for a switch command for reserve pump 2.
ብ
If the SMS confirmation does not come within 10 minutes,
start a new alarm message cascade to other recipients.
ቦ
If the switch command for switching on the reserve pump has been received,
switch on the PLC output Y10 (or a relay).
2.6 Model And Equipment Versions
The Mitsubishi Alarm Modems were offered in two equipment versions: GM series (Alarm
Modem GSM) and AM series (Alarm Modem 56k ). The basic functions within these series are
identical.
Mitsubishi Alarm Modems for GSM (GM)
Mitsubishi Alarm Modems 56k for the analog telephone line (AM)
Function overview Teleservice via PC
Mitsubishi Alarm Modem 2-2
Interfaces MAM-GM6 MAM-GM20 MAM-GM24
COM1
RS232 RS232 RS232
COM2
— RS232 RS485/422
Tab. 2-1 Interfaces of the GM series
Interfaces MAM-AM6 MAM-AM20 MAM-AM24
COM1
RS232 RS232 RS232
COM2
— RS232 RS485/422
Tab. 2-2 Interfaces of the AM series