Revision 1.1
Variphase User Manual
Page 10
Address DIP Switches
Each Variphase in a network must be set to a unique address between 1 and 127. There are 8
switches on the DIP switch block of which switch 1-7 are used for addressing. Switch 8 should be
left in the OFF position
(not used for addressing). Refer Figure 10 for switch position examples.
Address 0 is reserved for the Control Console (MODBUS master).
Note: Option jumpers and address settings are only checked by the VariPhase controller at
power-up, so power must be cycled before any changes take effect.
Soft-Start
Normally the motor voltage responds immediately to a change in analog input signal. Some
applications may require a soft-start to reduce start-up currents. To enable soft-start, set the
Soft-Start bit in the Mode Register (Register 23). This register is non-volatile.
When enabled, soft-start will occur when the output changes from a stop to start, either by
increasing the analog input from zero, or by the optional enable/disable signal.
Variphase will ramp to the new set-point at a rate determined by PID Rate Register (Register 20).
Each bit in Register 20 represents 50ms for each percentage speed change. A value of 20, will
give a soft-start of 1% / second (100 seconds to reach full-speed).
Soft-Start has no effect in closed-loop control modes.
Control Configuration Examples
Analog Speed Control Using Potentiometer
Overview
•
An external potentiometer controls
output from minimum to 100%.
•
Adjust Minimum speed using on-
board MIN speed trim pot and a
screwdriver.
•
Turning potentiometer to zero turns
off motor.
Configuration
•
Remove JP2, JP4 and JP5 (if
installed)
•
Install JP1 (Enables Analog Input)
•
Do not make connection to ANA2.
Wiring
7 W ay 0.2" Term inal Block Plug
Phoenix 1757064 or sim ilar
Potentiom eter
5K - 50K O hm s
+
5
V
H
a
ll
0
V
+
1
2
V
A
N
A
2
0
V
A
N
A
1
Variphase Control Terminals
Figure 3
