Chapter 5 – Start-up Procedure
5-6 ACS 502 Installation & Start-up Manual
6. Check the monitored values of Operating Data Parameters 1 – 8 for
normal drive and motor operation.
7. Return to Operating Data Parameter 1 (Output Frequency).
8. Slowly increase the frequency value of Parameter 1. Verify that motor
speed varies as frequency varies.
9. Increase the Parameter 1 frequency value to 60 Hz and return to Display
mode.
10. Measure the output current in all three phases. The current should be
balanced, and should not exceed the motor or drive rating.
11. If a Bypass option is supplied, check the motor rotation in bypass. Set the
Bypass switch to BYPASS, then to TEST. If the motor turns in the wrong
direction, swap any two input power wires.
If the drive operates according to these steps, your ACS 502 is ready to use
with preset or modified macro adjustments.
If the drive does not operate according to these steps, refer to Chapter 6 –
Fault Tracing in this manual.
Note: If you plan to use an external control device for your drive, you must
wire the control to the drive according to the wiring scheme of the
macro you select. If the 115 VAC control transformer is supplied,
the Option Pack macro must be selected. Refer to Chapter 3 –
Installation Instructions in this manual for more information on specific
external control wiring schemes.
Refer to the Chapter 2 – Overview of the ACS 502/504, Control Panel
Operation for more information on accessing and changing parameters.
Keypad Control vs.
External Control
The ACS 502 can be controlled from two external control locations or from
the Control Panel keypad. Refer to the ACS 500 Adjustable Frequency AC
Drives 2 to 350 HP Programming Manual Including Application Macros,
Chapter 3 – Control Operations, for additional information. The selection
between KEYPAD and EXTERNAL is made through Operating Data Parameter
9 (Control Location).
KEYPAD R1 is a direct frequency reference, set by Operating Data Parameter
10 (Keypad Ref 1). KEYPAD PI goes through an application block, where it
can be manipulated when the PI-controller is selected, set by Operating Data
Parameter 11 (Keypad PI (REF 2)). Refer to the ACS 500 Adjustable
Frequency AC Drives 2 to 350 HP Programming Manual Including
Application Macros, Chapter 3 – Control Operations, for additional
information.
EXTERNAL selection will cause the ACS 502 to follow commands connected
to X50 (or TB1), such as a manual speed pot, HOA switch, Automatic Start,
and Speed Signals, etc.
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