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Delta Electronics Programmable Logic Controller DVP-PLC User Manual

Page 463

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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.