Hitachi SJ300 Series Serial Communications

3–59

SJ300 Inverter

Serial Communications

The following table configures the communications port of the SJ300 inverter. You can have up to thirty-two devices on the serial communications network. The inverters are slaves and the computer or digital operator is the master. Thus, all inverters on the serial connection must use the same baud rate, data length, parity, and stop bits. However, each device on the serial network must have a unique node address. See “Serial Communications” on page B–1 for more information.

	“C” Function			Run		Defaults
				Mode				Units	SRW Display
Func.				Edit	–FE	–FU	–FR
	Name		Description
Code				Lo Hi	(EU)	(US)	(JP)
C070	Data command method	Four option codes:		✘ ✘	02	02	02	—	>C070 PARAM
		02	Digital operator						SELECT	REM
		03	RS485
		04	Expansion card #1
		05	Expansion card #2
C071	Communication speed	Five option codes:		✘ ✔	04	04	04	bps	>C071 RS485
	selection	02	(Test)						BAU	4800bps
		03	2400bps
		04	4800bps
		05	9600bps
		06	19200bps
C072	Node allocation	Set the address of the		✘ ✔	1.	1.	1.	—	>C072 RS485
		inverter on the network.							ADDRESS	01
		Range is 1 to 32.
C073	Communication data	Two option codes:		✘ ✔	7	7	7	—	>C073 RS485
	length selection	07	7-bit data						BIT	7BIT
		08	8-bit data
C074	Communication parity	Three option codes:		✘ ✔	00	00	00	—	>C074 RS485
	selection	00	No parity						PARITY	NO
		01	Even parity
		02	Odd parity
C075	Communication stop bit	Two option codes:		✘ ✔	1	1	1	—	>C075 RS485
	selection	01	1 stop bit						STOPBIT	1BIT
		02	2 stop bits
C078	Communication wait	Time the inverter waits after		✘ ✔	0.	0.	0.	—	>C078 RS485
	time	receiving a message before it							WAIT	0000ms
		transmits. Range is 0.0 to
		1000 ms

Parameters Drive Configuring