RS-485 Communication Features
• If there is an undefined address in the addresses for writing into multiple consecutive data
defined in the common area, or if the value that is being written is not a valid one, no error
response about the wring operation is returned. If all the consecutive addresses are
undefined, or if all the date is invalid, one return code is received from the first undefined
address only.
It may take longer to set the parameter values in the inverter memory control area because all
data is saved to the inverter. Be careful as communication may be lost during parameter setup if
parameter setup is continues for an extended period of time.
7.4 BACnet Communication
7.4.1 What is BACnet Communication?
BACnet (Building Automation and Control network) is a communication network frequently
used in building automation. BACnet introduces the concept of object-oriented systems,
and defines standardized objects. By exchanging data, this function makes communication
possible between products from different companies. It also stadardizes some of the
general services carried out by using these standard objects.
7.4.2 BACnet Communication Standards
5 Pin Pluggable connector
RS-485 MS/TP, Half-duplex
Twisted pair (1 pair and shield)
Stated in ANSI/ASHRAE Standards 135-2004
Supports 9600, 19200, 38400, 76800 bps
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