Downloading Your Program; Connecting The Controller To The Pc; Figure 10. Connecting The Pc To The Controller; Table 1: Rs232: Pinout - Unitronics Vision 120 OPLC User Manual

Vision120 OPLC™ User Guide
Diagram
Pin #1
Note that standard programming cables do not provide connection points for pins 1 and 6.
In addition, note that when a port is adapted to RS485, Pin 1 (DTR) is used for signal A, and
Pin 6 (DSR) signal is used for signal B as shown in Table 2.

Downloading Your Program

You can download programs via a direct cable connection between your PC and the
controller. The cable should not exceed 3 meters in length.

Connecting the Controller to the PC

•
Connect the controller to your PC using the communication cable as shown in
Figure 10.
20
Table 1: RS232: Pinout

Figure 10. Connecting the PC to the Controller

Pin Number RS232: Function
1 DTR signal
2 0V reference
3 TxD signal
4 RxD signal
5 0V reference
6 DSR signal