Alarm handling and subscriptions (S7CommPlus)

[gijzelaerr]

Problem

thomas-v2 has full alarm subscription support: AlarmSubscriptionCreate/Delete, AS alarm browsing, alarm text retrieval by language. lircy has an Alarming module too. python-snap7 has no alarm support at all.

Scope

• Alarm subscription create/delete via S7CommPlus CreateObject
• Alarm state browsing
• Alarm text retrieval (multi-language)
• Both sync and async clients

References

• thomas-v2: AlarmSubscription module
• lircy: Alarming module

Priority

Important — table stakes for SCADA/HMI integrations.