5-38
5-4 Analog Signal
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
If an analog input is used for the frequency reference, current/voltage switch is performed as
follows.
Note: For details, refer to "Frequency Reference Selection and Output Frequency Setting" on page 5-15.
Analog Input Filter (FV, FI Sampling)
Helps remove noise in the frequency setting circuit.
If the frequency reference is specified using an external analog signal, a sampling time can be
set for voltage input or current input.
Set a larger data value if stable operation cannot be secured because of noise.
The larger the data value is, the slower the response time. This parameter specifies a filter time
constant for a set value of 1 to 30 (× 2 ms).
When data "31" is selected, a filter time parameter of 500 ms and a hysteresis of ±0.1 Hz are
set.
Parameter
No.
Function name Data
Default
setting
Unit
A005 FV/FI Selection
00
Use the FV/FI terminal to switch between
FV (voltage) and FI (current).
FV/FI terminal ON: Current
FV/FI terminal OFF: Voltage
00 −
02
Enabled only when 3G3AX-OP01 is
used.
Use the FV/FI terminal to switch between
FV (voltage) and volume.
FV/FI terminal ON: Volume
FV/FI terminal OFF: Voltage
03
Enabled only when 3G3AX-OP01 is
used.
Use the FV/FI terminal to switch between
FI (current) and volume.
FV/FI terminal ON: Volume
FV/FI terminal OFF: Current
C001 to C007
Multi-function
Input Selection
16: FV/FI (Analog input switch)
−−
Parameter
No.
Function name Data
Default
setting
Unit
A016
Analog Input Filter
(FV, FI Sampling)
1. to 30.: Set value × 2 ms filter
8 −
31.: Fixed to 500 ms filter
With ±0.1 Hz hysteresis
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