Chapter 1
1-5
Communications Methods
● Communications Unit Number
To communicate with the host computer, set a unit number for each Inverter so that the Inverters can
be recognized by the host computer. The unit number can be set to an integer value between 0 and
99.
Note When communicating with multiple Inverters, do not set the same unit number for more than
one Inverter. If the same unit number is set for more than one node, the system will not operate
correctly.
• Up to 32 nodes including the host computer can be connected in a 1:N system.
• When connecting a 1:N system, make sure that the communications specifications are the same for
all the node that are connected. In addition, set a unique communications unit number for each
node.
● Communications Baud Rate
This parameter sets the baud rate for communications with the host computer. The communications
baud rate settings are as follows:
2.4 (2,400 bps), 4.8 (4,800 bps), 9.6 (9,600 bps), and 19.2 (19,200 bps).
● Communications Data Length
This parameter sets the number of communications data bits. Set either “7 bits” or “8 bits.”
● Communications Stop Bits
This parameter sets the number of communications stop bits. Set either “1 bit” or “2 bits.”
● Communications Parity
This parameter sets the communications parity. Set the parity to “none,” “even,” or “odd.”
P15 Communications unit number Changes during
operation
No
Setting range 0 to 99 Default setting 1
P16 Communications baud rate Changes during
operation
No
Setting range 2.4/4.8/9.6/19.2 (kbps) Default setting 9.6
P17 Communications data length Changes during
operation
No
Setting range 7/8 (bits) Default setting 7
P18 Communications stop bits Changes during
operation
No
Setting range 1/2 (bits) Default setting 2
P19 Communications parity Changes during
operation
No
Selected item None/even/odd Default setting Even
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