PLC: Analog Voltage Gain Setting

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This presentation explains the Analog Output Voltage Gain setting while using PLC Analog Cards to manipulate control signals of 0 ~ 10V & 4 ~ 20 mA

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PLC: Analog Voltage Gain Setting

  1. 1. www.nfiautomation.org Analog Signal Processing PLC Analog Cards
  2. 2. Basic Analog to Digital Curve DVP 04 AD
  3. 3. www.nfiautomation.org Basic Analog to Digital Curve 1 Volt =800 bits Resolution: 1.25mV 10 VDC 5 VDC 0 VDC 0 4000 8000
  4. 4. www.nfiautomation.org Basic A/D Curves If Input Voltage range is 0 ~ 5 VDC GAIN: Voltage Input value when digital Output is K4,000 Should be -3200 ~ +16,000LSB. Gain 2000 (2.5*800) 5 VDC 2.5 VDC 0 VDC 0 4000 8000
  5. 5. www.nfiautomation.org Basic A/D Curves OFFSET 2000 (2.5*800) Gain 3000 (3.75*800) 5 VDC 3.75 VDC 2.5 VDC 0 4000 8000 GAIN: Voltage Input value when digital Output is K4,000 Should be 0LSB ~ +4,000LSB. OFFSET: Voltage Input value when digital Output value is K0 should be -4,000LSB ~ +4,000LSB.
  6. 6. Basic Digital to Analog Curve DVP 04 DA
  7. 7. www.nfiautomation.org Basic Digital to Analog Curves 50 Hz 10 VDC 25 Hz 1 Volt = 400 bits Resolution: 0.0025 V 2.5 mV 5 VDC 0 Hz 0 VDC 0 2000 4000
  8. 8. www.nfiautomation.org Basic D/A Curves GAIN: The setting range of voltage output value when digital input value is K2,000 Should be 0LSB ~ +4,000LSB. Gain 1000 (2.5*400) 25 Hz 1 Volt = 800 bits Resolution: 0.00125 mV 1.25 mV 5 VDC 12.5 Hz 2.5 VDC 0 Hz Resolution Increases with dec. in range 0 VDC 0 2000 4000
  9. 9. www.nfiautomation.org Basic D/A Curves GAIN: The setting range of voltage output value when digital input value is K2,000 Should be 0LSB ~ +4,000LSB. OFFSET 1000 (2.5*400) OFFSET: The setting range of voltage output value when digital input value is K0 Gain should be -2,000LSB ~ +2,000LSB. 1500 (3.75*400) 5 VDC 18.75 Hz 3.75 VDC 12.5 Hz 2.5 VDC 25 Hz 1 Volt = 800 bits Resolution: 0.00125 mV 1.25 mV 0 2000 4000 Resolution Increases with dec. in range
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  12. 12. Thanks www.nfiautomation.org nfi

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