tures. The buffer time of the real-time clock depends on the ambient tempera-
ture and the operating time of the control.
Operating time of the control at ambient temperature
Buffer time of the clock
①
5 years at 50 °C permanent Typ. 10 days
7 years at 50 °C permanent Typ. 7 days
10 years at 50 °C permanent Typ. 4 days
2.5 years at 60 °C permanent Typ. 10 days
3.5 years at 60 °C permanent Typ. 7 days
5 years at 60 °C permanent Typ. 4 days
① Accuracy of ±1 s/d at 25 °C
Tab. 12-5: Buffer time of the real-time clock depends on the ambient temperature and on
the operating time of the control
It is recommended to set the time via SNTP.
12.8 Real-time response
Full capability is ensured within the specified operating temperature range be-
tween -25 °C and +60 °C. If the device is used beyond the specification (ope-
rating temperature exceeds 60°C), ensure sufficient convection in the control
cabinet or monitor the CPU load applicatively to ensure real-time response.
12.8.1 Programming example – Exception handling in case of a PLC task
watchdog
It is recommended to configure the maximum processing time permitted (watch-
dog) for each PLC task within an application. The maximum permitted process-
ing time is configured in the task configuration of the PLC.
IndraControl XM21, XM22 Controls
55/69
Device description
R911340667_Edition 04 Bosch Rexroth AG
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