Yaskawa iQpump Programming Manual - Manual (Page 71)

YASKAWA TM.iQp.02 iQpump Drive Programming Manual 71
Figure 1.63
Figure 63 Output Frequency with Reduced Bias Setting
As a further example, for an inverse-acting speed command, set the bias = 100% and the gain = 0%. The minimum analog input level (0
Vdc or 4 mA) will produce a 100% speed command and the maximum analog input level (10 Vdc or 20 mA) will produce a 0% speed
command.
Figure 1.64
Figure 64 Output Frequency with Inverted Gain and Bias Settings
■ H3-08 Terminal A2 Signal Level
The H3-08 parameter (Terminal A2 Signal Level) allows the programmer to specify the signal that will be applied to the A2 analog input.
The A2 analog input can accept either a 0–10 Vdc or 4-20 mA signal as a reference. The iQpump drive also has a DIP switch (S1) on the
removable terminal board that must be set for the proper reference signal into the A2 analog input. The S1-2 dipswitch setting determines
the internal resistance of the A2 input while parameter H3-08 determines how the iQpump drive interprets the measured signal.
Setting Description
0 0 - 10 Vdc
2 4 - 20 mA (factory default)
3 0 - 20 mA
0V
4mA
10V
20mA
Gain = 100%
Bias = -25%
O
ut
put
F
req
ue
ncy
Analog Input Level
2.5V
8mA
Analog Input Signal
20mA 4mA
0V 10V
Gain = 100%
Bias = 0%
Out
put
F
req
uen
cy
Analog Input Level
Analog Input Signal
Bias
Gain