BECKHOFF C1300 - Manual (Page 17)

C1300 VME to II/O Interface Unit Beckhoff II/O-System
Date : 18.12.95 Version : 2.01 Page 17 of 44
3.3. Test and Analysis Functions
Function 01h : FO-RESET
This function initialzes the fo-ring.In the course of the initialization the number of
modules in the ring is detected, the module addresses are distributed and tested.
Finally the ring is tested for its (Dämpfungsreserve). A fraction that could occur in
the cable is detected and localized.
channel length function argument 0 argument 1 argument 2 comment
call 02 01
response 05 01 00 00 nn Function worked properly
(nn modules in the fo-ring)
05 01 01 01 00 Maximum of transmission
repetitions exceeded
05 01 01 02 00 No addressing possible
05 01 0a 01 nn Fraction before module nn,
before receiver line in of
module C1300
05 01 0a 01 ff Fraction cannot be localized
( fraction before
line in of receiver )
05 01 07 01 nn Test addresses :
Address error ( modul nn)
05 01 05 02 00 Absorbtion test :
error at High-Intensity
05 01 05 03 nn Absorbtion test :
Error switching low intensity
( modul nn)
05 01 05 04 nn Absorbtion test :
Error at data pattern 1
( pattern 00) (module nn)
05 01 05 05 nn Absorbtion test :
Error data pattern 2
( pattern FF) (module nn)
05 01 05 06 nn Absorbtion test :
Error data pattern 3
( pattern AA)(module nn)
05 01 05 07 nn Absorbtion test :
Error switching high-intensity
(module nn)
If the ring initialization is completed and no errors occured, the present number of
modules in the ring is transmitted. If an error was detected, the error type (see
table) and the modul addresses of the error detecting module are returned.