26 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
Parameter 418 [Brake TP Sel] selects a value to monitor for diagnostics of the
dynamic brake protection. Parameter 419 [Brake TP Data] displays the data
selected in parameter 418 [Brake TP Sel]. Possible selections for parameter 418
[Brake TP Sel] are:
Cable, Control
Refer to the Wiring and Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives Installation Instructions, publication DRIVES-IN001
, for
detailed information.
Cable, Lengths for Motors
Refer to the Wiring and Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives Installation Instructions, publication DRIVES-IN001
, for
detailed information.
Cable, Power
Refer to the Wiring and Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives Installation Instructions, publication DRIVES-IN001
, for
detailed information.
Par 418 [Brake TP Sel] Setting Description
0 - “Zero” Do not monitor any test point for the brake protection.
1 - “Duty Cycle” Actual duty cycle of the dynamic brake IGBT where a value of 0 in
parameter 419 [Brake TP Data] = full open and 1 = full on.
2 - “Power Actual” Actual power applied to the resistor (Watts).
3 - “Max BodyTemp” Maximum temperature that the resistor body can handle (°C).
4 - “Max ElemTemp Act” Maximum temperature that the resistor element can handle (°C).
5 - “BodyTemp Act” Predicted temperature of the resistor body (°C).
6 - “ElemTemp Act” Predicted temperature of the resistor element (°C).
7 - “BTmpTrip Stat” Maximum resistor body temperature has been exceeded when
parameter 419 [Brake TP Data] = 1.
8 - “ETmpTripStat” Maximum resistor element temperature has been exceeded when
parameter 419 [Brake TP Data] = 1.
9 - “Int DB Ohms” Rating of the internal resistor when an internal resistor is installed
(Ohms).
10 - “Data State” A value of 0 in parameter 419 [Brake TP Data] = initial state, 1 =
internal resistor data loaded, 2 = external resistor data loaded.
11 - “MC BrakeEnbl” A value of 0 in parameter 419 [Brake TP Data] = dynamic braking
disabled, 1 = dynamic braking enabled.
12 - “1/rdb” Inverse of the resistance (1/Ohm).
13 - “1/th_eb” Inverse of the thermal impedance from the resistor element to
body (Watts/°C).
14 - “1/ce” Inverse of the resistor element thermal mass (°C/W x sec).
15 - “tamax” Maximum ambient temperature of resistor (°C).
16 - “1/th_ba” Inverse of the thermal impedance from the resistor body to
element (Watts/°C).
17 - “1/cb” Inverse of the resistor body thermal mass (°C/W x sec).
18 - “DB IGBT Amp” IGBT current rating (Amps).
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