Vaisala MMT330 - Manual (Page 134)

User's Guide _______________________________________________________________________
134 __________________________________________________________________ M210764EN-F
The last message displayed may be incomplete if there is active Modbus
traffic while using the MODBUS command.
Modbus RTU only: If the last received message was rejected because of
bad CRC checksum, the MODBUS command displays the message with
corrected CRC (last two bytes updated).
To clear the counters, select again the Modbus mode with the SMODE
command:
>smode modbus
Disabling Modbus
If you stop using Modbus with the transmitter, set the transmitter to some
other operating mode using the display/keypad option or the SMODE
command.
For example, to return the transmitter to the RUN mode where the
measurements are output at regular intervals, issue the following
command through the service port:
>smode run
Alternatively, you can enter the Main Menu using the display/keypad
option, and change the mode from the Interfaces submenu.
The other communication settings of the output interface (User Port,
LAN interface, or WLAN interface) will remain as configured, but the
Modbus protocol will be disabled.