5.2Connecting a PC or Controller to the RS-485 Port
You can operate the VS-88DTPvia the RS-485 port from a distance of up to 1200m (3900ft) using any device equipped with an RS-485 port (for example, a PC). For successful communication, you must set the RS-485 machine number and bus termination.
To connect a device with a RS-485 port to the VS-88DTP:
•Connect the A (+) pin on the RS-485 port of the PC to the A (+) pin on the RS-485 port on the rear panel of the VS-88DTP
•Connect the B (–) pin on the RS-485 port of the PC to the B (–) pin on the RS-485 port on the rear panel of the VS-88DTP
•Connect the G pin on the RS-485 port of the PC to the G pin on the RS-485 port on the rear panel of the VS-88DTP
5.2.1Setting the RS-485 Machine Number
When several VS-88DTPunits are connected, the machine number determines the unique identity of the VS-88DTPon the bus (see Figure 6).
Note:
•When using a stand-alone VS-88DTPunit, set the machine number to 1 (factory default)
•When connecting more than one VS-88DTP, set the first machine (connected via RS-232) to be machine number 1. The other VS-88DTPunits must each be set to a unique machine number between 2 and 16
The machine number on the VS-88DTPis set using the DIP-switches on the rear panel.
To set the RS-485 machine number using the DIP-switches:
Figure 4 illustrates the factory default MACH # DIP-switch settings.
12 | VS-88DTP - Connecting the VS-88DTP |
