Vaisala PTU300 - Manual (Page 155)

Chapter 5 ___________________________________________________________________ Modbus
VAISALA _______________________________________________________________________ 153
For a description of the available settings, see section
Wireless LAN Configuration on page 87.
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
PTU300 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.