Vaisala HUMICAP HMT330 SERIES, Руководство пользователя

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User's Guide ______________________________________________________________________
140 _________________________________________________________________ M210566EN-J
Taking MODBUS into Use
To take the MODBUS protocol into use on the HMT330, you must
perform some configuration tasks using the built-in display and keypad
(optional) or a PC connected to the serial line. For example, you can
connect to the service port using the USB service cable (Vaisala order
code: 219685). The transmitter must be powered from a suitable power
supply during configuration.
Instructions for performing the configuration are provided in the
following sections:
- Enabling Serial MODBUS on page 141
- Enabling Ethernet MODBUS on page 143
After configuring the transmitter, perform the transmitter installation and
wiring according to the instructions in Chapter 3, Installation, on page
27.
The configuration instructions assume you are familiar with the use of
the transmitter. Additional details on the display/keypad, service port use,
and serial commands are available in other sections of this manual:
- The use of the display/keypad option is described in section
Display/Keypad (Optional) on page 69.
- If this is the first time you are using the USB service cable, you can
find detailed instructions in section Service Port Connection on page
81. You must install the required driver before using the service cable.
- Configuration of the LAN and WLAN Interfaces is decribed in section
LAN Communication on page 82.
- The serial commands available through the service port are described
beginning from section List of Serial Commands on page 93.