Beckhoff C1220 Manuel d'utilisateur télécharger pdf (Page 11)

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11 Software description of functions

Beckhoff Lightbus - PC interface card C1220

A function request is composed of a length entry, a function number and

the function arguments. The length entry refers to the number of following

bytes:

Byte ’Length’ + Byte ’Function number’ + Number of Bytes ’Argument

0’ to ’Argument n’

Test and analysis functions

Fibre-optic reset

The fibre-optic ring can be reinitialized by means of this function. Within the

scope of initialization, the number of modules in the ring is defined, the

module addresses are distributed and tested and the ring is checked with

regard to its attenuation reserve. Any existing fracture point is also

detected and located.

ArgumentChannel Length Function

0 1 2

Comment

Request

02 0x01

05 0x01 00 00 nn Function correctly executed

(nn modules in the fibre-optic ring)

05 0x01 01 01 00 Maximum number of send repetitions

exceeded

05 0x01 01 02 00 No address setting possible

05 0x01 0a 01 nn Fracture point before nn-th module

before the receiver input of the C1220

05 0x01 0a 01 ff Fracture point cannot be located

(Fracture point before receiver input)

05 0x01 07 01 nn Test addresses:

Address error (module nn)

05 0x01 05 02 00 Attenuation test:

Error with high intensity

05 0x01 05 03 nn Attenuation test:

Switch error with low intensity

(module nn)

05 0x01 05 04 nn Attenuation test:

Error with data pattern 1

(pattern 00)(module nn)

05 0x01 05 05 nn Attenuation test

Error with data pattern 2

(pattern FF) (module nn)

05 0x01 05 06 nn Attenuation test :

Error with data pattern 3

(pattern AA) (module nn)

05 0x01 05 07 nn Attenuation test :

Switch error with high intensity

(module nn)

The number of modules in the ring is communicated if the ring is initialized

without errors. If an error should have occurred, the error type (see table)

and the module address where the error occurred are returned.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 29 30

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Beckhoff C1220 Manuel d'utilisateur Page 11

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