YASKAWA SI-T/ V7, Technical Manual

Page: 62 / 157

5-10
The Drive allows selection of up to twenty-three frequency references. Three are analog inputs,
sixteen are digital presets (selected with multi-function inputs), one is a jog input, one is a pulse
train input, one is via serial communications (MODBUS), and one is from an option cable (see
paragraph 5.32).
A. Frequency Reference via Analog Input
In order to set the Drive so the frequency reference comes from the analog input, set parameter
n004 as shown in the table below:
(1)
SW2 consists of two separate slide switches and can be found just above the upper row of control circuit terminals.
The switch towards the bottom (labeled “2”) connects a 250
Ω
resistor from terminal FR to FC when set to the “on”
position (to the right). NOTE: All power must be removed from the Drive before SW2 can be set.
B. Frequency Reference via Digital Presets
In order to set the Drive so the frequency reference comes from the digital presets, the following
parameters need to be set:
Depending upon how many preset references are required determines the actual settings of n050
thru n056. Several examples are listed below.
PARAMETER SETTING DESCRIPTION
n024 User
thru Set Eight Frequency References
n031
n050 6, 7, 8, Sets the multi-function inputs so selection of the various references is
thru and/or possible with contact closures.
n056 9
n120 User
thru Set Eight More Frequency References
n127
PARAMETER SETTING DESCRIPTION
2 Sets terminal FR for a voltage input (0 to 10V) Set SW2 switch 2 to Off
(1)
n004 3 Sets terminal FR for a current input (4 to 20mA) Set SW2 switch 2 to On
(1)
4 Sets terminal FR for a current input (0 to 20mA) Set SW2 switch 2 to On
(1)
5.11 FREQUENCY REFERENCE SELECTION