Delta DVP-PLC, Applications Manual

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8 Application Instructions API 100-149
DVP-PLC Application Manual
8-61
Experiment in an oven which can be heated up to 250
°
C. See below for the records of target and present
temperatures. As shown in the diagram below, we can see that after 48 minutes, the temperature is able to
reach the target temperature with
±
1
o
C inaccuracy and exceed approx. 10
°
C of the target temperature.
Example 2:
Due to that the temperature once exceeds the target temperature, we modify the heating
environment into “fast heating environment” (D13 = K16). The results are shown in the diagram below.
From the diagram below, we see that though the temperature no longer exceeds the target temperature, it still
needs to take more than 1 hour and 15 minutes to reach the target temperature with
±
1
o
C inaccuracy. It seems
that we have chosen the right environment, but the sampling time is too long, resulting in the extension of
heating time.