List of figures

AN3975

4/26

Doc ID 022170 Rev 1

List of figures

Figure 1.

RS485 over power line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 2.

Connectivity gateway board with RS485 extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3.

ST485ABDR in SO8 package - RS485 module schematic. . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4.

CG (connectivity gateway) CN3 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 5.

Module signal pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 6.

Connectivity gateway board with interfacing USB and PLM . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 7.

HW interconnection of the complete test system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8.

Windows COM port setting dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9.

Even parity bit P = 0 on the eighth position of the data bit . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 10.

Even parity bit P = 1 on the eighth position of the data bit . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 11.

RS485 - one-byte transmission - jumper J1 closed, matching resistor 120 connected . . . 17

Figure 12.

RS485 - two-byte transmission - jumper J1 closed, matching resistor 120 connected. . . . 18

Figure 13.

RS485 - two-byte transmission - jumper J1 opened, matching resistor 120 not

connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 14.

Closed loop setup for communication test using bigger datafiles, UART loop . . . . . . . . . . 20

Figure 15.

Closed loop setup for communication test using bigger datafiles, RS485 loop . . . . . . . . . 20

Figure 16.

Closed loop test - 320-byte data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 17.

Log of packets - 320-byte data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 18.

Closed loop test - 2,565-Kilobyte data transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 19.

Log of packets - 2,565-Kilobyte data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23