Automation Direct DURApulse GS4 User Manual page 192

Chapter 4: AC Drive Parameters
P4.10 AI1 Input Bias (Offset)
Range/Units (Format: 16-bit signed)
–100�0% to +100�0%
P4.11 AI1 Input Bias (Offset) Polarity
Range/Units (Format: 16-bit binary)
0: NO Offset
1: Positive Offset
2: Negative Offset
P4.12 AI1 Input Gain
Range/Units (Format: 16-bit signed)
–500�0% to +500�0%
Parameters P4.10 to P4.13 are used when the source of the Frequency Command is an analog
voltage signal connected to AI1. The relationship between the external input voltage (current) and
setting frequency: 0~10V (4~20mA) corresponds to 0~60Hz.
• P4�10 adjusts the bias (offset) for Analog Input #1�
• P4�11 sets the offset polarity for Analog Input #1�
If the application requires a negative offset, but the PLC cannot supply a negative number, choose
"Negative Offset" and enter a positive number in P4�10�
• P4�12 adjusts the gain for Analog Input #1�
• P4�13 provides a delay to serve as an electrical noise filter for Analog Input #1�
Offset Polarity
P4.10
Positive P4�11=1
thru
Negative P4�11=2
P4.12
Calculation by
Parameter #s
NOTE: P4.24 must be set to enable bias and gain calculations for this AI.
NOTE: Refer to the detailed Analog Input Examples
Analog Parameters" listings for more information.
P4.13 AI1 Filter
Range/Units (Format: 16-bit unsigned)
0�00~20�00 sec
This parameter sets a delay for Analog Input #1 to filter a noisy signal.
When the setting of P4.13 is too large, the reading of AI1 will be more stable but the control
response will be slower. When the setting of P4.13 is too small, the control response will be faster
but the control may be unstable due to a noisy AI1 reading. To find the optimal setting, adjust the
setting according to the desired amount of response vs signal accuracy.
P4.14 reserved
Range/Units
n/a
Page 4–98
Analog Command Calculation
Frequency Output (Hz) = [ (Analog In %) x (Gain %) + (Bias %) ] x (Max Out Hz)
Frequency Output (Hz) = [ (Analog In %) x (Gain %) - (Bias %) ] x (Max Out Hz)
Frequency Output (Hz) = [ (AI Volts / 10) x (P4�12) ± (P4�10) ] x (P0�04)
(page
DURA
GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
pulse
Type
♦R/W
Default
0
Type
♦R/W
Default
0
Type
♦R/W
Default
100�0
4–112) at the end of these "Group P4.xx Details –
Type
♦R/W
Default
0�01
Type
n/a
Default
n/a
Hex Addr Dec Addr
040A 41035
Hex Addr Dec Addr
040B 41036
Hex Addr Dec Addr
040C 41037
Hex Addr Dec Addr
040D 41038
Hex Addr Dec Addr
040E 41039