Remote-processing RPC-52 User Manual download pdf (Page 33)

CHAPTER 12 USER JUMPERS

Page 31

Figure 12-1 W8 user jumpers

DESCRIPTION

Eight jumpers are available at W8. These jumpers may

be read as part of a program to determine a boards

function or configuration. It is up to you to determine

what the jumpers mean. A common use is to set the

boards address in a RS-485 network.

Jumpers are at bank 6, address 1, bits 0-7.

Jumper W 8 is mapped to the following bit num bers.

Jumper Bit No.

[1-2] 0

[3-4] 1

[5-6] 2

[7-8] 3

[9-10] 4

[11-12] 5

[13-14] 6

[15-16] 7

Jumper status is read using the LINEB function. A ' 0'

indicates a jumper is installed.

100 A = LINEB(6,1)

Jumpers m ay be read to deter mine a car d address. Use

the following map to assign a value to a jumper. When

a jumper is installed, its value is 0. When r emoved, its

value is shown to the right. The pr ogram example

shows how a jumper configuration can be converted into

a number and a string. The values below are returned

for a position if other jumpers are installed.

Jumper Value

[1-2] 1

[3-4] 2

[5-6] 4

[7-8] 8

[9-10] 16

[11-12] 32

[13-14] 64

[15-16] 128

Assume W8[7-8] and [1-2] are not jum pered a nd all

others are. The program would return the following

value.

10 A = LINEB(6,1)

20 PRINT "Jumper value is:",A

RUN

Jumper value is: 9

Even if all jumpers are not installed, you can .A ND. out

jumper s not of intere st.

1 2 ... 28 29 30 31 32 33 34 35 36

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