8/8/2018 6:46 AM | |
Joined: 4/23/2010 Last visit: 12/31/2023 Posts: 8092 Rating: (877) |
Hello, S7 series has different series CPUs e.g. 300, 400, 1200 1500 etc. etc. To process analog signals, depending upon measuring accuracy demand, with appropriate bit resolution analog module needs to be selected. In analog module ADC are used to convert analog signal to digital signals. Scaling is used to configure minimum & maximum values to be measure proportionat with sensor range, e.g. you are measuring process temp of 20 deg cent to 100 deg cent & sensor range is 4 mA to 20 mA. In this case in PLC scaling is used to configure 4mA = 20 deg cent & 20 mA = 100 deg cent. In case of analog outputs it is reverse, i.e. analog output modules are selected which converts digital signal to analog. Please read/refer this FAQs to understand more. HTH. |
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