<td style="vertical-align:middle;">Swapping RS485 A and B lines (or RS232 Tx and Rx) of the external device and also not connecting common ground first - May cause irreparable damage.</td>
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</tr>
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</table>
====Log mode====
====Log mode====
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====RS-232 LCD mode====
====RS-232 LCD mode====
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In this mode, the user is able to communicate with the server through the terminal. A link between the FMB device and the server has to be established for this mode to function properly.
+
In this mode, the user is able to communicate with the server through the terminal. A link between the {{{model|FMB640}}} device and the server has to be established for this mode to function properly.
To communicate from terminal to server - in terminal send command "WT^W your text here"
To communicate from terminal to server - in terminal send command "WT^W your text here"