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Software description of functions 20

Beckhoff Lightbus - PC interface card C1220

ArgumentChannel Length Function

0 1 2 3 4

Request

07 0x0f 0m Criterion

for

interrupt

channel 0

Criterion

for

interrupt

channel 1

Criterion

for

interrupt

channel 2

Criterion

for

interrupt

channel 3

03 0x0f 0m

The LOW nibble in the argument 0 specifies which of the 4 possible

interrupt channels is to be enabled.

Example: m = 0x00 all interrupt channels disabled (Default)

m = 0x01 Interrupt channel 0 enabled

m = 0x06 Interrupt channels 1 and 2 enabled

m = 0x0f Interrupt channels 0, 1, 2 and 3 enabled

Each interrupt channel can be characterized by way of a criterion.

The following criteria can be selected:

Criterion Interrupt-Channel

(0,1,2,3)

no Interrupt

Interrupt on positive edge

Interrupt on negative edge

Interrupt on edge change

The respective criteria are assigned to the interrupt channels by way of the

arguments 1 to 4.

Example:

ArgumentChannel Length Function

0 1 2 3 4

Request

07 0x0f 0x0c 00 00 01 03

Interrupt enabling for channels 2 and 3

Interrupt criterion for interrupt channel 0

no interrupt transfer

Interrupt criterion for interrupt channel 1

no interrupt transfer

Interrupt criterion for interrupt channel 2

Interrupt transfer with a positive edge

Interrupt criterion for interrupt channel 3

Interrupt transfer with an edge change

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 29 30

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