User Manual

7000 Bus Converter User’s Manual (Version 1.8 Jan/2006, 7PH-006-18) --------------- 72
6.4 RS-232 Devices Network
(For this application, we recommend to use i-7520U to replace the i-7520)
Some RS-232 devices can be connected to the 7000 RS-485
network very easily, just like the PC or PLC introduced in Sec 6.2 and Sec.
6.3. These RS-232 devices must adhere to 3 rules given as follows:
Rule 1: cannot send out the RS-232 signal in normal,
operating state.
Rule 2: every device has a unique device address
Rule 3: will not send out a RS-232 signal if the destination
address does not match with the device address
The software for RS-232 device networking and PLC
networking is very similar. The only difference is the command
format. The command format of PLC is always different for
different manufacturers. Refer to “DCON_DOS.pdf” for software
details.