SMAX MODBUS®
When the page of the interface opens, by means of the drop-down box in the
Select serial com
field you can choose the serial port the device is connected
to. The port that is currently selected is indicated in the drop-down box. If you
do not know the number of the COM port the device is connected to select the
All coms
check box.
In the
Address
field in the
DEVICE
group box, the MODBUS address of the
connected device must be entered. By default the address of all Lika devices is
“1”. If you do not know the MODBUS address of the networked device select the
All addresses
check box.
If you select the
All coms
and
All addresses
check boxes the tool will scan all
the available serial ports (COM1 first, then COM2, COM3, etc., if installed) and
will test for each one all the baud rate and parity bit options (9600 No parity,
9600 Even, 9600 Odd, etc.) and all the possible addresses (from 1 to 247,
according to the MODBUS protocol).
It is clear that this searching operation may take a while.
To start searching and connect to the device press the
CONNECT
button in the
DEVICE
group box. While the program is attempting to connect to the device, a
green progress bar appears over the button to indicate that the searching
operation is in progress; a further progress bar and the label
Busy
over the drop-
down box of the
Select serial com
field indicate that the port is currently open
and being checked. As long as the communication is active the bar indicates
that the port is open. When there is no communication the port becomes
available for other applications after a timeout of about 1 second.
If problems occur while trying to establish the connection (you have selected a
wrong or not available serial port, or the port is currently busy; or you have set a
wrong node address, etc.), the interface will go on trying to establish the
connection uninterruptedly, until the
CONNECT
button is pressed once again.
The message
No device
and the name of the last address and serial port that
have been checked will appear under the button.
MAN SMAX MB E 1.2
Quick reference
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