Vaisala DMT346 - Manual (Page 143)

Chapter 5 ___________________________________________________________________ Modbus
VAISALA _______________________________________________________________________ 143
8. Modbus configuration is now complete. Reset or power cycle the
transmitter to enable the Modbus mode, and proceed with the
installation of the transmitter.
Diagnostic Modbus Counters
DMT345/346 has diagnostic counters that can be used to pinpoint
Modbus problems. The counters are always active when the Modbus
protocol is enabled.
Viewing Counters Using Display/Keypad
You can use the display/keypad option to view and clear the counters.
Enter the Main Menu and navigate to
System ► Diagnostics
► MODBUS Counters.
1101-037
Figure 71 Modbus Counters
Viewing Counters Using Service Port
Use the Modbus command to view the counters:
MODBUS
Example:
>modbus
Bus messages : 0
Bus comm. error: 0
Bus exceptions : 0
Slave messages : 0
Slave no resp. : 0
Last message :
>
In addition to the diagnostic counters, the last message (received or
transmitted) is shown in hexadecimal format. If the last message was a
broadcast message, the suppressed response message is shown.
The last message displayed may be incomplete if there is active Modbus
traffic while using the MODBUS command.