Yaskawa AC Drive Z1000 AC Drive HVAC Fan - Manual (Page 75)

Settings 10 and 11: Up/Down Function
The Up/Down function allows the frequency reference to be set by two push buttons when one digital input is programmed
as the Up input (H1-oo= 10) to increase the frequency reference and the other digital input is programmed as the Down input
(H1-oo= 11) to decrease the frequency reference.
The Up/Down function takes priority over the frequency references from the HOA keypad, the analog inputs, and the pulse
input (b1-01 = 0, 1, 4). When using the Up/Down function, references provided by these sources will be disregarded.
The inputs operate as shown in the table below:
Status
Drive Operation
Up (10) Down (11)
Open Open Hold current frequency reference
Closed Open Increase frequency reference
Open Closed Decrease frequency reference
Closed Closed Hold current frequency reference
Note: 1. An oPE03 alarm occurs when only one of the Up/Down functions is programmed to a digital input.
2. An oPE03 alarm occurs when the Up/Down function is assigned to the terminals and a different digital input is programmed for the
Accel/decel ramp hold function. Refer to the Troubleshooting chapter in the User Manual packaged with the drive for more information
on alarms.
3. The Up/Down function can only be used for External reference 1. Consider this when using Up/Down and the external reference switching
command (H1-oo = 2).
Using the Up/Down Function with Frequency Reference Hold (d4-01)
• If the frequency reference hold function is disabled (d4-01 = 0), the Up/Down frequency reference will be reset to 0 when
the Run command is cleared or the power is cycled.
• When d4-01 = 1, the drive will save the frequency reference set by the Up/Down function. When the Run command or the
power is cycled, the drive will restart with the saved reference value. Close the Up or Down input without an active Run
command to reset the saved value. Refer to d4-01: Frequency Reference Hold Function Selection on page 59 .
Using the Up/Down Function with Frequency Reference Limits
Parameter d2-01 determines the upper frequency reference limit.
The value for the lower frequency reference limit depends on the parameter d4-10 setting. This value can be set by an analog
input or parameter d2-02. When a Run command is applied, the lower limits function as follows:
• If the lower limit is set by d2-02 only, the drive accelerates to this limit as soon as a Run command is entered.
• If the lower limit is determined by an analog input only, the drive accelerates to the limit when both the Run command and
an Up or Down command are active. The drive will not start running if only the Run command is active.
• If the lower limit is set by both an analog input and d2-02, and the analog limit is higher than the d2-02 value, the drive
accelerates to the d2-02 value when a Run command is input. When the d2-02 value is reached, the drive accelerates to the
analog limit only if an Up or Down command is set.
Figure 1.33 shows an Up/Down function example with a lower frequency reference limit set by d2-02, and the frequency
reference hold function both enabled and disabled.
Accelerates to
lower limit
Output frequency
upper limit
Lower limit
FWD run/stop
Up command
Down command
Power supply
Same
frequency
d4-01 = 1
d4-01 = 0
ON ON
ON
ON
ON
Hold
frequency
reset
Figure 1.33 Up/Down Command Operation
1.7 H: Terminal Functions
YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual 75
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Parameter Details