ACU-01B 3HNA024871-001/03 ABB Robot Gas Distribution Flow Control Unit
ACU-01B 3HNA024871-001/03 ABB Robot gas distribution flow control unit
ACU-01B 3HNA024871-001/03 ABB Robot gas distribution flow control unit
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During Online Upgrade of firmware in the AC 800M HI, the application controlling
the process is stopped for a short period of time. During this time period the output
signals are not updated, but keep their current values. The duration of this time is
depending of the configured Online Upgrade Handover Limit.
For most processes it is possible to find a process state, or a period of time when the
configured FDRT can be exceeded without creating any hazardous situation. Based
on such a judgement of the process, the Online Upgrade Handover Limit can be set
in accordance with the following formula.
• Online Upgrade Handover Limit =
Max acceptable Output freeze time - 2 x actual Task Interval Time - 2 x
ModuleBus scan time.
If the configured FDRT are to be maintained also during an Online Upgrade session,
the Online Upgrade Handover Limit shall be set in accordance with the following
formula:
• Online Upgrade Handover Limit =
FDRT - 2 x the longest Task Interval Time - 2 x ModuleBus scan time.
The maximum length of the time period the outputs are not updated can be
determined by using the following formula:
• Output freeze time = Online Upgrade Handover Limit + 2 x the actual Task
Interval Time + 2 x ModuleBus scan time.
The AC 800M HI has an “Error Handler” to handle faults discovered by the
different diagnostic systems in a consistent manner. In order to adapt to different
needs, the user can configure the Error Handler reaction as described in
Table 4. Error Reaction, Normally Energized/Shutdown Applications on page 92
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