Programming the MOBY-ASM on PROFIBUS
B.2 Cyclic Control Word between Master and MOBY-ASM
FB 45
B-6
Function manual, Release 03/2006, J31069-D0166-U001-A2-7618
After start-up, the cyclic word of MOBY-ASM takes on the following states (bits 8 to 15 are
shown).
3RZHUXS
&RPPDQG
&RPPDQG
$IWHU
FRPPDQG
%HIRUHDFNQRZO
HGJHPHQW
%HIRUH
FRPPDQG
%HIRUHDFNQRZO
HGJHPHQW
%HIRUH
FRPPDQG
5(6(7
&RPPDQG
Synchronizing of command and acknowledgment counters
The command (BZ) and acknowledgment (QZ) counters are synchronized during a start-up.
The ASM sets QZ = 0 and BZ = 1. The start-up can be triggered by both the ASM (return of
power) and the user (init_run_).
5(6(7FRPPDQG
WR$60
5(6(7FRPPDQG
IURP$60
$F\FOLF
WHOHJUDP
%=4=
DQ\YDOXH
,IDFRPPDQGZDVLQWHUUXSWHG
E\D5(6(7RU
LQLWBUXQBHUURUPHVVDJH
)LVWULJJHUHGKHUH
UHDG\ UHDG\PHVVDJHLQXVHUSURJUDP
UHDG\
%= 4=
GHILQHGUHVHW
%=
4=
LQLWBUXQB
$1=BUHVHWB
Figure B-3
Power-up timing initiated by user
5(6(7FRPPDQG
WR$60
5(6(7FRPPDQG
IURP$60
$F\FOLF
WHOHJUDP
UHDG\ UHDG\PHVVDJHLQXVHUSURJUDP
UHDG\
%=
%=
%=
4=
LQLWBUXQB
$1=BUHVHWB
ณณ
ณณ
ณณ
ณณ
Figure B-4
Power-up timing of ASM initiated by power failure