9. Data Processing Design Examples 9.7 SER - Room Temperature Monitoring Control Purpose: z Monitoring the overall temperature condition by acquiring temp. data through air condition system from 20 rooms in the building Compare the present temp. with the target value. If there are more rooms whose temp. match the target value, it indicates the air condition system functions well. z Adjusting the air condition devices in rooms with the highest and lowest temp. Count the amount of rooms whose temp. match the target value so as to judge the efficiency of the air condition system. In addition, search the rooms with the highest and lowest temp for adjusting immediately. Devices: Control Program:
X1 Initialize the target value as 25 ℃ X1 Storing the Temp. data acquired from the 1st thermocouple module in D0~D3. Storing the Temp. data acquired from the 2nd thermocouple module in D4~D7. Storing the Temp. data acquired from the 3rd thermocouple module in D8~D11. . Storing the Temp. data acquired from the 4th thermocouple module in D12~D15 . Storing the Temp. data acquired from the 5th thermocouple module in D16~D19. DVP-PLC Application Examples 9-10 Device Function X1 Executing SER instruction to search data D50~D53 Temperature data acquisition of the 1st thermocouple module (unit: 1°C) D54~D57 Temperature data acquisition of the 2nd thermocouple module (unit:
1°C) D58~D61 Temperature data acquisition of the 3rd thermocouple module (unit: 1°C) D62~D65 Temperature data acquisition of the 4th thermocouple module (unit: 1°C) D66~D69 Temperature data acquisition of the 5th thermocouple module (unit: 1°C) D100 Storing the target value D200~D204 Storing the temperature search result MOV K25 D100 FROM K0 K6 D0 K4 FROM K1 K6 D4 K4 FROM K2 K6 D8 K4 FROM K3 K6 D12 K4 FROM K4 K6 D16 K4