motortronics CSD Series, Operation & Service Manual

Page: 40 / 76

CSD Series Variable Frequency AC Drive
MOTORTRONICS
- 36 -
Figure 5 - 6
Table 5 F - Analog Frequency
Signal Control
Fn24 = Jog frequency reference - Factory Setting = 2.0 Hz;
Range = 0 - 400 Hz
Fn24 sets the jog speed. The jog speed can be activated by one of the
multiple function input switches TM1 pins 6 - 8 by programming Fn56
- Fn58 = 3. Activating the multifunction input switch will cause the
drive’s frequency reference to change to the value set in Fn24.
Fn25 = Master Frequency Reference
Frequency operation is used in digital operation control (Fn11 = 0)
The master frequency can be changed by pressing the
∧
and
∨
directly
but do not need to set the function code to Fn25 when the drive is in
master frequency operation.
Analog Frequency Signal Control (See Figure 5 - 6 and Table 5 F below)
Fn26 - 29 control the offset and gain of the analog input signal. These
functions are only effective when Fn11 = 1 or 2. Note: Fn28 must be
greater than Fn27
Fn26 = Frequency reference - Factory Setting = 0 Hz;
Range = 0.0 - 400 Hz
Fn27 = Voltage reference ratio 1 - Factory Setting = 0%;
Range = 0 - 100%
Fn26 and Fn27 are offset controls. Fn26 tells the drive what speed to
run with a minimum analog input signal. Fn27 tells the drive the deadband
on the bottom of the analog input signal before the drive begins to
respond.
Fn28 = Voltage reference ratio 2 - Factory Setting = 100%;
Range = 0 - 999.9%
Fn28 is the gain control. Fn28 tells the drive at what frequency to run
with the maximum analog input signal existing at the analog input.
Fn29 = Positive/Negative direction - Factory Setting = 0; 0 Positive,
1 Negative
Fn29 can be used to invert the command signal. With Fn29 = 1, the
maximum analog input signal will produce the minimum speed and
the minimum analog input signal will produce the maximum speed.