BECKHOFF C1300 - Manual (Page 20)

C1300 VME to II/O Interface Unit Beckhoff II/O-System
Page 20 of 44 Version : 2.01 Date : 18.12.95
Function 05h : Absorbtion test
The light absorbtion of the fo-ring can be tested by means of this function. In this
test all connection cables of the fo-ring are partially run at about 80 % of the
normal transmission intensity using specified test telegrams. This test can be run
on all modules or on a single one selected before ( shown in the figure below ).
The C1300 interface can be tested seperately or through module address 0.
" Error at high intensity " means: The ring has even in a normal run an absorbtion
that is too high or a fraction of cables or connection occured.
" Error switching Low intensity " means, that the transmission intensity of the
module concerned cannot be reduced.
"Error at data pattern xx " shows up that in the fo-ring absorbtion is too high, after
the signal passed the last module .
" Error switching high intensity " means the module concerned cannot be reset
to full transmission intensity.
This figure shows an overview of the function call and responses possible.
channel length function argument
0
argument
1
argument
2
comment
call 04 05 00 00 test all modules
04 05 01 nn test module nn
response 04 05 00 00 there is sufficient absorbtion
(*)
04 05 02 00 error at High-Intensity
04 05 03 nn error switching Low-Intensity
( module nn)
04 05 04 nn error at Data pattern 1
( pattern 00) (module nn)
04 05 05 nn error at Data pattern 2
( pattern FF) (modul nn)
04 05 06 nn error at Data pattern 3
( pattern AA)(module nn)
04 05 07 nn error switching High-Intensity
(Modul nn)