Rockwell Automation 1336_F_E_T_S SERIES A CHOPPER BRAKE MODULE - Manual (Page 26)

Heavy Duty Dynamic Braking 26
1336-5.65 — March, 2007
Setup
1336 and 1336VT Parameter Settings
Parameter 11 — Decel Frequency Hold — must be set to OFF when
dynamic braking is installed. Refer to your 1336 or 1336VT Programming
Manual for programming procedures and record the changes for future
reference.
1336IMPACT Parameter Settings
When dynamic braking is installed:
• Parameter 76 [Regen Power Lim] typically should be set to its factory default
of “-200.0%”. A lower Regen Power Lim may be required to protect the
load during decel.
• Set Bit 10 of Parameter 13 [Bus Options].
Refer to your 1336IMPACT User Manual for programming procedures and
record the changes for future reference.
1336FORCE Parameter Settings
When dynamic braking is installed:
• A lower Regen Power Lim may be required to protect the load during decel.
Parameter 178 [Regen Power Lim] typically should be set to the required
negative % of torque.
• Clear Bit 11 of Parameter 88 [VP Flt/Warn Cfg].
Refer to your 1336FORCE User Manual for programming procedures and
record the changes for future reference.
1336PLUS and 1336PLUSII Parameter Settings
When dynamic braking is installed:
• Parameter 11 [Bus Limit En] must be set to “Disabled”.
• Braking for deceleration requires that the drive be programmed for
“Ramp-to-Stop”. Braking for overhauling loads may or may not be stop
mode specific. Program Parameters 10 and 52 per the application.
Refer to your 1336PLUS User Manual for programming procedures and
record the changes for future reference.
ATTENTION: Each brake chopper module contains a
thermostat to guard against overheating and component
damage.
If the duty cycle, torque setting and/or ambient temperature
exceeds the specifications listed in this publication, the
thermostat is designed to trip and disable the brake modules
until components cool to rated temperature. During the
cooling period, only 10% braking torque will be available to
the motor.
If reduced braking torque represents a potential hazard to
personnel, auxiliary stopping methods must be considered
in the machine and/or control circuit design.
!