Specifications

Core Software Operation

ADDvantage-32 PLUS ● AC to DC Power Converter

3-28

X***:MFLD ASCALE is a scaling factor for full field amps vs. feedback CT voltage.

The UL field supplies for the 56 amp and 180 amp drive needs this changed to 2 and

2.083 respectively (Chassis P/N D22974 and D22976, included in all new drives). For

540, 850, and 1350 amp drives, a 12 amp field supply is expected. For 1550-3000 amp

drives, a 24 amp field supply is expected.

If a drive is equipped with a different amp field supply, this parameter needs to be

adjusted; e.g., if an 850 amp drive is equipped with a 24 amp field supply, enter

(24 amps/12 amps) = 2. (See Section 1.4 Identification of Part Numbers for full field

rating.)

For AFM applications, the drive expects 2 volts feedback equal to a 12 amp field supply.

Adjust to correct for proper amperage; e.g., if 2 volts = 48 amps, enter (48 amps/12 amps)

= 4.

If the field current required is greater than the ADDvantage-32 PLUS rating,

modifications can be made. Consult the factory for additional information.

3.15 MOTOR THERMAL SETTINGS

X*** Parameters A*** Parameters D*** Parameters

X***:THERMAL TC A***:MOTOR TEMP D***:M-TEMP WARN

X***:M-TEMP WARN A***:HEATSK TEMP D***:HS TMP WARN

X***:RBRDF RATIO A***:IIR INTEGR

Thermal capacity of the ADDvantage-32 PLUS and motor is represented by two internal

counters called I

R (IIR, as shown in drive) integrators. Any time the ADDvantage-32

PLUS drive or the motor is operating over 110% of full load, its counter starts to count

up. If an integrator reaches 100, then the drive will fault and shut down. If the current

goes below its 110% rating, its counter will start to count down until it reaches zero.

There is a scaling factor for the drives thermal protection on the reverse bridge. On AFM

applications, the reverse bridge may only be used for jog reverse and be sized smaller

than the forward bridge. Set X***:RBRDG RATIO to the forward bridge capacity over

the reverse bridge capacity.

The hardware is also protected by a thermocouple that monitors the SCR heat sink

temperature. If the heat sink gets too hot, the ADDvantage-32 PLUS faults out.

Motor temperature can also be monitored by the ADDvantage-32 PLUS. This is done by

determining the present motor field resistance and comparing it to the original value. An