ICP DAS USA 7000 user manual PLC Networking Applications, RS2

6.2PLC Networking Applications

PC

RS2

32

		￿7520						￿7510
	R	RS485	D+					RS485	D+
	T
			D-						D-
GND		RS232						RS485
					￿7520R		￿7520R				￿7520R
				RS485		RS485				RS485

	RS232		RS232		RS232
	T R	Gnd	T R Gnd		T R Gnd
	￿PLC 1		￿PLC n		￿PLC m
DC power	Address=1 DC power		Address=	DC power	Address=m
			n

These PLCs can be used at different baud rates & different configurations. For example,

PLC-1=1 start + 7 data + 1 stop=9-bit/byte, baud rate=1200 PLC-n=1 start + 8 data + 1 parity + 1 stop=11-bit/byte, baud rate=9600 PLC-m=1 start + 8 data + 1 parity + 2 stop=12-bit/byte, baud rate=115200

OMRON CQM1 = 1 start + 7 data + 1 even parity + 2 stop =11-bit/byte OMRON C200 = 1 start + 7 data + 1 even parity + 2 stop = 11-bit/byte

The ￿7520 can be the 7520 or 7520R, refer to Sec. 2.5 for details.

The ￿7520R, ￿7520R, ￿7520R can be the 7520 or 7520R, refer to Sec. 2.5 for details. In this configuration, the ￿PLC1, ￿PLCn, ￿PLCm provides DC power to ￿7520R, ￿7520R, ￿7520R. This is the cheapest to the 3000V high isolation. The user should not replace the 7520R, ￿, ￿, ￿, with the 7520.

Refer to “NAP7000S User Manual” for PLC networking software details.

7000 Bus Converter User Manual (version 1.2,Feb/2003, 7PH-006-10) --------------- 77