When to Use This Page

• Use this page when time stamps, scheduled events, logger intervals, or status messages must follow local time correctly.
• Use it also when a manual synchronization action or a manual clock correction must be performed during service.

Recommended Commissioning Order

1. Check TZONE and change it only if the installation is not in time zone 1.
2. Leave DSTMODE and CLOCKSYNC at their shared runtime defaults unless the installation has a verified need for different behavior.
3. Review VOICETIME only when the installation uses voice alarms.
4. Use CLOCK and DATE only if automatic clock synchronization is not active yet or cannot be used during commissioning.
5. Use SUNOW, SUSYNC, and SUR only for manual service-triggered synchronization actions.

Best Practice

• An incorrect combination of TZONE and DSTMODE will shift logs, calendar events, and time-stamped messages.
• If CLOCKSYNC is working, do not correct CLOCK and DATE manually as part of normal operation, because automatic synchronization will overwrite the manual values again.
• Use the manual synchronization actions only after communication is working correctly on Shared Runtime Communication.

Synchronization Actions

Use these service instructions when runtime must request or push synchronization manually.

• Use category: Manual or service use only.
• Use these actions only when the installation needs an immediate manual synchronization step outside the normal automatic flow.
• Do not use them as routine daily operation. Normal installations should rely on the active automatic synchronization path instead.

Time Zone

Use this setting to define the fixed local offset relative to UTC.

• Use category: Installation-dependent.
• The shared runtime default is time zone 1. Change it only if the installation is in another time zone.
• Set the correct time zone before commissioning loggers, calendars, or time-based functions.
• An incorrect time zone will shift local time in messages and scheduled events.

Daylight Saving Time Handling

Use this setting to control whether runtime should apply daylight saving time automatically on top of the selected time zone and whether that change should generate a status message.

• Use category: Advanced - leave default unless you know what you are doing.
• Do not change this setting as part of normal commissioning unless the installation follows another daylight saving time policy than the shared runtime default.
• Use daylight saving time only where the installation actually follows a daylight saving time regime.
• If status messages are enabled for the change, the installation can confirm when runtime switches between standard time and daylight saving time.

Automatic Clock Synchronization

Use this setting to control automatic synchronization of the controller clock against gateway or server time.

• Use category: Advanced - leave default unless you know what you are doing.
• In the current shared runtime, levels 4..6 are the active automatic synchronization levels.
• Normal installations should leave this setting on its shared runtime default so the controller clock stays synchronized automatically.
• Higher active levels can also report successful adjustments or synchronization failures as status information.
• If the installation is not centrally time-controlled, time and date can be set manually instead.

Manual Time and Date

Use these instructions only when the controller clock must be read or corrected manually during commissioning or service.

• Use category: Manual or service use only.
• Set the time zone correctly first so local time is stored and returned in the right context.
• Use manual time and date setting only on new installations, during service, or when automatic synchronization is not active yet.
• If CLOCKSYNC is active, do not use manual time and date adjustment as a normal operating method, because the synchronized source will overwrite manual corrections.

Clock

Use this instruction to read the current local time or to set a new local time manually.

• Read the current time with CLOCK ?.
• Set a new local time with CLOCK hhmm.
• If automatic clock synchronization is active, any manual correction is normally temporary.

Parameter	Index	Range	Format	Default	Example
CLOCK	-	0000..2359	hhmm	-	CLOCK ? CLOCK 0930

Date

Use this instruction to read the current local date or to set a new local date manually.

• Read the current date with DATE ?.
• Set a new local date with DATE yyyymmdd.
• If automatic clock synchronization is active, any manual correction is normally temporary.

Parameter	Index	Range	Format	Default	Example
DATE	-	Valid local calendar date	yyyymmdd	-	DATE ? DATE 20260412

Voice Cycle Time

Use this setting to control how long a voice-call sequence may circulate when voice alarms are active.

• Use category: Optional feature setting.
• Review this only when the installation actually uses voice alarms.
• If voice is active and the value is set to 0, runtime uses a fallback cycle time of 30 minutes.