LOVATO ELECTRIC DMK40, Руководство пользователя программного обеспечения

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Activation of the PC - DMK connection
To run the program, the PC and the DMK multimeters must be able to exchange data on the serial link. To
activate the connection, carry out the following operations:
1. Make sure that the PC you intend to use has an available and free RS-232 serial interface port. The
serial ports are usually identified with the COM: code and usually range from COM1: to COM4: even
though most of the PCs available on the market have only two serial ports (COM1: and COM2:) which
can be identified by their 9-pin male receptacle connector. To use the program, you must first of all
identify which port of your PC you intend to use; remember that, in some cases, one of the serial ports
may already be occupied by the mouse
2. Configure the software for use of the port selected; you can do this during the initial installation phase or
subsequently using the Configuration-Options-General menu (see the specific paragraph). The default
serial port is COM1: set to 9600 baud, no parity.
3. Set up the RS-485 network, i.e. connect the Rs232/Rs485 converter to the PC and then all the
multimeters to each other and to the converter as indicated in the Connection diagrams paragraph
below. Comply scrupulously with the polarity of the Rs485 cables.
4. We recommend use of a Rs232/Rs485 converter furnished by Lovato. If you intend to use another type
of converter, Lovato will be unable to provide assistance in the case of wiring problems and to assure
correct functioning of the 485 network. In any case, the converter must be insulated and must have an
enable line automatic control circuit.
5. From the keypad of each multimeter, access the parameters of the serial interface (see the Addendum to
the manual furnished with the appliances) and set a different serial address for each DMK starting from
01 onwards. Check that the speed and parity settings all the multimeters match those of the PC.
6. At this point, you can run the program. If the wiring and the settings are correct, the connection with the
DMK 01 will be activated automatically.
Connection diagram (direct)
In the case of problems…
If the connection does not work (when you try to switch to Online, the program issues a beep and switches
automatically to Offline), check the following points carefully:
•
The number of the COM: port of the PC used must match that programmed in the Configuration-Options-
General-Serial port settings window.
RS232 RS485
SG A B TR
RS232
PC
A TR B SG
PX1
RS485
TR B A
DMK40 n°31
SG
DMK40 n°1
Max 1200m