Startup Timing Initiated By User; Startup Timing By Asm Initiated By Power Failure - Siemens MOBY FC 56 Technical Description

Programming MOBY-ASM on PROFIBUS-DP-V1
After startup, the cyclic word of MOBY ASM takes on the following states
(bits 8 to 15 are shown).
0 0 8 8
Before command
Startup
Synchronizing of command and acknowledgment counters
The command (BZ) and acknowledgment (QZ) counters are synchronized during a
startup. The ASM sets QZ = 0 and BZ = 1. The startup can be triggered by both
the ASM (return of power) and the user (init_run).
init_run_
ANZ_reset_
Non-cyclic
telegram
Ready
BZ=1, QZ=0
BZ, QZ
defined reset
any state
Ready = Finished message in user programm
Figure B-3 Startup timing initiated by user
init_run_
ANZ_reset_
Non-cyclic
telegramm
Ready
BZ=0
Ready = Finished message in user programm
Figure B-4 Startup timing by ASM initiated by power failure
B-6
0 8 1 0
Before acknowledgment
After command
1st command
(RESET)
Reset command
to ASM
BZ=1
3 0 3 8
Before command Before acknowledgment
2nd command
Reset acknow.
from ASM
When a command is interrup-
BZ=2 QZ=1
ted with RESET (or init_run_),
error message 1F occurs
here.
RESET command
to ASM
BZ=2 QZ=1
5 8 4 0
...........
...........
3rd command
RESET acknow.
from ASM
FC 56
J31069-D0155-U001-A0-7618