Rockwell Automation 1395 Digital Reference Adapter Board - Manual (Page 35)

Chapter 5
Programming Parameters
5-10
SetĆUp Parameters
Set-Up parameters control how the Digital Reference Adapter Board
manipulates data. Parameters 550 through 592 are set-up parameters for a
Digital Ref board installed in Port A. The parameters for Port B are shown
below the corresponding Port A parameters. All examples given are for
Port A. Specifically they allow programming the bit positions for digital
inputs and outputs along with scale factors and offsets for analog inputs
and outputs. All 1395 Drives are shipped preset. Review all parameters and
values for your specific application. If not applicable, change the values
accordingly.
Parameter 550 – [A > ADC Scale 1]
Parameter 500 – [B > ADC Scale 1]
Use : Scale Factor for Analog Input 1
Programming Terminal units: None
Minimum Value: +16
Maximum Value: –16
Default Value: 2
Description: This parameter determines the scale factor or Gain for
Analog Input 1. A 0 to + 10VDC signal is applied to the input of the
analog to digital converter. There, it is converted to a +2048 digital
value prior to being digitally scaled, digitally offset and typically used
by the drive as the process trim reference input from a dancer
potentiometer. Before the digital value is displayed or transferred to the
drive, the Scale Factor is applied, thus allowing an effective digital
range of +32767(16 times 2048). The absolute digital value is clamped
at 32767.
Parameter 551 – [A > ADC Offset 1]
Parameter 501 – [B > ADC Offset 1]
Use : Digital Offset for Analog Input 1
Programming Terminal units: Volts
Minimum Value: +20VDC
Maximum Value: –20VDC
Default Value: 0 VDC
Description: This parameter determines the digital offset applied to the
output of the analog to digital converter of the Analog Input 1 value,
before the digital scale factor is applied. This allows the user to shift the
range of the analog input.
Parameter 552 – [A > ADC Scale 2]
Parameter 502 – [B > ADC Scale 2]
Use : Scale Factor for Analog Input 2
Programming Terminal units: Volts
Minimum Value: +16
Maximum Value: –16
Default Value: 2
Description: This parameter determines the scale factor or Gain for
Analog Input 2. A 0 to + 10VDC signal applied to the input of the