Commissioning • General instructions for performing Temperature tests
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Automation PC 810 with GM45 CPU board user's manual V1.28
4.3 Evaluating the temperatures in an operating system other than Windows
For applications that don't use Windows, the temperatures can be evaluated using the B&R implementation guide.
In addition to the implementation guide, there are also programs available in MS-DOS.
The implementation guide only describes the device-specific functions and not the main functions of the sample
programs.
If code from the sample programs is used, please observe the notes in the implementation guide regarding the
TODO statements, I/O access functions, etc.
Information:
Sample programs and implementation guides for all B&R Industrial PCs and Power Panel can be down-
loaded at no cost from the B&R website (
).
4.4 Evaluating the measurement results
The maximum temperature value recorded by each sensor must not exceed the temperature limits specified in
the user's manuals.
If the temperature tests cannot be performed in a climate controlled chamber, they can also be performed in an
office environment. In this case, however, it is necessary to measure the ambient temperature. Experience at B&R
has shown that values measured on passive systems (systems without a fan kit) can be projected linearly based
on the ambient temperature. In order to be able to project the temperature values for systems with a fan kit, the
fans must be running. It is also important to consider the speed, etc..
If the temperature tests are performed in a climate controlled chamber with fans, the devices will be cooled by these
fans, and the results will be skewed. The measurement results for passive devices would therefore be unusable.
In order to obtain accurate results in climate controlled chambers with fans, the chamber fans must be turned off
and the device must be allowed to run for a sufficient amount of time (several hours) before beginning the test.
Example using an APC810 2-slot
The following example is only valid as long as the instructions for installation and mounting orientation provided
in the user's manual are followed.
Temperature sensor
Measured temperature
Projected temperature
Ambient temperature
20°C
35°C
45°C
CPU
48°C
63°C
73°C
CPU board
51°C
66°C
76°C
Board I/O
51°C
66°C
76°C
Board ETH2
52°C
67°C
77°C
Board power supply
51°C
66°C
76°C
ETH2
65°C
80°C
90°C
Power supply
51°C
66°C
76°C
Table 131: Evaluation example using an APC810 2-slot
