Rockwell Automation SA3100 Distributed Power System Drv Config,Program - Manual (Page 148)

Commissioning Procedure for Non-Constant Power Algorithim Operation J-1
A
PPENDIX
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Commissioning Procedure
for Non-Constant Power
Algorithim Operation
Background
The SA3000 and SA3100 AC vector control drives utilize the same control algorithm.
This control algorithm contains a constant power algorithm to provide for load
changes such as temperature. It is possible to configure both the SA3000 and
SA3100 to NOT utilize this constant power algorithm.
Note: If other algorithms are selected, they should be commissioned using the
procedure outlined in the manual, as the drive must always be commissioned by a
procedure to set the proper magnetizing current for the motor.
The procedure for Constant Power Commissioning is outlined in the readme files of
the DPS product, and the present procedure is explained later in this chapter.
Current Procedure - The present procedure is undertaken after the PMI has
calculated its gains (PMI Tune - caused by asserting bit 1 of register 100/1100). This
procedure entails running the motor at a specific set of speeds. At these speeds, a bit
is asserted by the operator, and the drive will sample the magnetizing current for the
motor at this time.
New Procedure Explanation - This new procedure expands on the present
procedure by adding steps that must be taken at the first speed point. Currently the
first speed point is at 40% of the maximum voltage speed of the motor. With the new
procedure, at the first point the speed will be altered to cause the drive to go to
synchronous speed. The no-load motor voltage will be sampled and used for
calculating motor parameters. The speed is then returned to the first point speed
value. The procedure continues from that point in the same fashion as the present
procedure.
New Procedure Revision 22E - The operations that make up this new revision, are
excercised at the first speed point. After the data is aquired at the first point, the
remainder of the commissioning procedure is the same.
At the first speed point - 40% of max voltage speed - assert the ‘tune iz’ bit (bit 10 of
register 101/1101). During this new procedure, you will monitor the following new
status bits: bit 12 of register 201/1201 “Synchronous Speed Reached”, and bit 13 of
register 201/1201 “Alter Speed”. Observe the “Alter Speed” bit, when the bit becomes
asserted, command the motor to go to synchronous speed (synchronous speed is
equal to 120* rated frequency/number of motor poles eg. for a 60Hz, 4 pole motor
synchronous speed as 120*60/4 =1800 RPM). When the drive achieves this speed,
the “Alter Speed” bit will become zero. The “Syncronous Speed Reached” bit will be
asserted. Observe the “Alter Speed” bit. When it is asserted, command the motor to
return to the first-point speed.