T200 User's Manual SECTION 6: T200 FUNCTIONAL OVERVIEW
PAGE 6-52
6.8.1.3 Fatal Faults
The following is an overview of the fault detection mechanisms in the T200. Note that the fault codes that are displayed
on the 7-segment display are explained in Section 3.19.
Power Amplifier Short Circuit [ F 1 ]
A power amplifier short circuit fault occurs when a short circuit between any one of the motor phases or between a
motor output phase and DC+ or DC- causes a fault current to flow. The Short Circuit detection circuitry detects such a
fault current and disables the T200 output inverter power amplifier. When the power amplifier is disabled the fault
current will cease but the fault remains latched until it is cleared by re-enabling the T200.
Figure 6.23:- Detectable Short Circuit Faults
If a Power amplifier Short Circuit fault occurs the system should be checked to determine the source of the short circuit.
The problem should be rectified before attempting to re-start the drive.
Bus-Overvoltage Fault [ F 2 ]
A bus-over-voltage fault occurs when the high voltage D.C. Bus that supplies power to the inverter power amplifier
exceeds a pre-set high level. This level is primarily determined by the voltage rating of the components which sit on the
D.C. Bus. Bus-over-voltage faults generally occur due to dynamic braking of the servo motors. When brushless DC
servo motors are braking they supply power back to the D.C. Bus that supplies the output inverter. This causes the DC
reservoir capacitors on the D.C. Bus to charge up. A regeneration circuit normally dumps this energy in resistive loads
when the voltage on the D.C. Bus capacitors reaches set levels. However if the energy being produced by the braking
load exceeded the capability of the regeneration circuitry, or if this regeneration circuitry has malfunctioned, the D.C.
Bus continues to rise until D.C. Bus over-voltage levels are reached. When a D.C. Bus overvoltage fault is detected the
output inverter power amplifier is disabled. The fault remains latched until it is cleared by re-enabling the drive.
DC+
DC-
Phase A Phase B
PE
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
Need help?
General
