Yaskawa AC Drive Z1000 AC Drive HVAC Fan - Manual (Page 92)

u H3: Multi-Function Analog Inputs
The drive is equipped with three multi-function analog input terminals: A1 and A2. Refer to Multi-Function Analog Input
Terminal Settings on page 94 for a listing of the functions that can be set to these terminals.
n H3-01: Terminal A1 Signal Level Selection
Selects the input signal level for analog input A1. Set jumper S1 on the terminal board accordingly for voltage input or current
input.
No. Name Setting Range Default
H3-01 Terminal A1 Signal Level Selection 0 to 3 0
Setting 0: 0 to 10 V with Zero Limit
The input level is 0 to 10 Vdc with zero limit. The minimum input level is limited to 0%, so that a negative input signal due
to gain and bias settings will be read as 0%.
Setting 1: 0 to 10 V without Zero Limit
The input level is 0 to 10 Vdc without zero limit. If the resulting voltage is negative after being adjusted by gain and bias
settings, then the motor will rotate in reverse.
Setting 2: 4 to 20 mA Current Input
The input level is 4 to 20 mA. Negative input values by negative bias or gain settings are limited to 0%.
Setting 3: 0 to 20 mA Current Input
The input level is 0 to 20 mA. Negative input values by negative bias or gain settings are limited to 0%.
n H3-02: Terminal A1 Function Selection
Selects the input signal level for analog input A1. Refer to Multi-Function Analog Input Terminal Settings on page 94 for
instructions on adjusting the signal level.
No. Name Setting Range Default
H3-02 Terminal A1 Function Selection 0 to 41 0
n H3-03, H3-04: Terminal A1 Gain and Bias Settings
Parameter H3-03 sets the level of the selected input value that is equal to 10 Vdc (20 mA) input at terminal A1 (gain).
Parameter H3-04 sets the level of the selected input value that is equal to 0 V (4 mA, 0 mA) input at terminal A1 (bias).
Use both parameters to adjust the characteristics of the analog input signal to terminal A1.
No. Name Setting Range Default
H3-03 Terminal A1 Gain Setting -999.9 to 999.9% 100.0%
H3-04 Terminal A1 Bias Setting -999.9 to 999.9% 0.0%
Setting Examples
• Gain H3-03 = 200%, bias H3-04 = 0, terminal A1 as frequency reference input (H3-02 = 0):
A 10 Vdc input is equivalent to a 200% frequency reference and 5 Vdc is equivalent to a 100% frequency reference. Since
the drive output is limited by the maximum frequency parameter (E1-04), the frequency reference will be equal to E1-04
above 5 Vdc.
1.7 H: Terminal Functions
92 YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual