PREMIUM DSP 40-80 KVA PF0.9 3/3 - UPS www.visionups.com
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9.3 Modem Connection
A DSP0.9 Series UPS can be controlled through a normal telephone line by means of a remote
operator connected through a PC with modem device, who performs a phone call to the UPS
connected number. So the operator can see all parameters and control the UPS (if permitted from
OPTIONS MENU).
9.3.1 Hardware Configuration
All requirements for modem connection are as follows:
PC with modem
WINDOWS 98
Available UPS control software (T-MON)
NULL modem which is connected to UPS
UPS has its command set to set NULL modem to auto answer mode. In order to do this, press ENTER
button for 3 seconds in ENTER: MODEM INIT item in COMMAND MENU after the hardware is
installed.
A short beep sound warning is heard after pressing the buton. RX and TX lights of the connected
modem activates. Modem is set after this to answer external calls by telephone line. To test this, call
the telephone number that the modem is connected with another phone and listen the modem sound.
NOTE:
Not all the modems are compatible with the command set on UPS. In such a case
modem should be set by connecting a PC.
9.3.2 Functioning Principle
The remote operator, by means of a PC and a modem device and using the remote connection
function of the control software, calls the UPS through the number to which this is connected.
The NULL modem device, connected to the UPS, will answer the call and convert the data coming
from UPS’s serial port on to the telephone line. This way all measurements and controls allowed by
the RS232 serial port can be carried out.
9.3.3 Modem Programming Procedure
Smart modem (SM) is the one connected to PC, and NULL Modem (NM) is the one connected to the
UPS.
Standard Hayes AT
programming language is the suitable language for modems. In usual
applications a modem which uses AT command set should be selected.
9.3.3.1 Smart Modem (SM) Programming
The connected modem to PC (smart modem) will be programmed from UPS control software (T-Mon)
automatically.
B0 E1 F1 M1 Q0 V1 X3
BAUD = 2400 PARITY = N
WORDLEN = 8
DIAL = TONE (TONE which can be programmed)
&A3 &B1 &C1 &D0 &H1 &I0 &K1 &M4
&N0 &R2
&S0 &T5 &Y1
