Siemens SIMATIC S7-1500 System Manual page 117

Redundant system
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System overview
5.3 S7-1500 R/H-CPUs
Example closed loop control of a valve in a mixer tap
The automation task is to control the valve of a mixer tap according to a desired temperature
setting. You configure the opening and closing of the valve in the PID_3Step technology
object. For this you need:
• An analog input channel for the actual value
• A digital output for "Control upwards" (e.g. open valve)
• A digital output for "Control downwards" (e.g. close valve)
The first step is to select the PID_3Step technology object in STEP 7:
Figure 5-26
Selection of the PID_3Step technology object in STEP 7
116
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF

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