IP244
C79000–B8576–C866–01
7–7
1.4 Alarm Processing
The adapter casing converts the S5 alarms into the S7 alarm functions and
alarm signals.
All alarms of the S5 module are transferred as (S7) process alarm. The follo-
wing allocation is used:
S5 alarm line S7 alarm line
/INT A /I1
/INT B /I2
/INT C /I3
/INT D /I4
New alarms are not triggered as long as OD (OUTPUT DISABLE; CPU in
STOP mode, for example) is active. Processing of pending alarms is conti-
nued. The rear edge of the OD signal resets the S7-related alarm functions.
Whether or not the rear edge of OD resets the S5-related alarm functions depends
on the individual S5 modules (see the related Manuals). If an alarm in an S5 mo-
dule is not reset by the rear edge of OD, a new alarm will be triggered following
the rear edge of OD.
If an S5 module in the adapter casing triggers an alarm, the logic address of
the module is stored in the local data area of the alarm OB.
To acknowledge an alarm you use the same familiar procedure as in S5 (see
Device Manual or Product Information). The CPU automatically performs
the additional alarm functions that are specific to the S7 system.
Introduction
Alarm allocation
Alarm with active
OD
Determine alarm-
triggering module
Acknowledging an
alarm
Adapter Casing (S5 Adapter)
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