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General
Main Control Board
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Test Points
This chapter is intended to define the 1395 test points on the major boards to
help you troubleshoot the drive. A table of normal values for each test point
on each board is provided.
The 1395 Main Control Board test points are common to all drive ratings.
Table 6.A Main Control Board Test Points
Test
Point Normal Value
1
Not Used
2
Full-wave rectified waveform from
Power Stage Interface Board, 2 volts =
Rated Armature Bridge Current (refer
to parameter 615).
3
Not Used
4
DC Voltage between 0 and +5V DC.
5
DC volts between 0 and +5V DC. Full
wave rectified three-phase waveform.
6
0V DC when armature current is zero,
+5V DC when armature current is not
zero.
7
Not Used
8
0V DC when phase loss detected, +5V
DC otherwise.
9
0V DC when no DC overcurrent exists,
+5V DC when a DC overcurrent exists.
10
Sawtooth type waveform varying
between 0 and +5V DC.
11
Not Used
12
0 to +5V square-wave
13
0 when encoder test is enabled, +5V
DC when encoder test is disabled (+5V
DC for normal operation).
14
DC voltage between 0 and +10V DC.
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Chapter
Description
Not Used
ABSIA signal from Power Stage Interface
representing armature current feedback as sensed by
CTs on incoming 3 phase AC line.
Not Used
Three-phase supply signal derived from half-wave
rectification of the 3 phase line to line voltages.
DC voltage representing armature current feedback
derived from the ABSIA signal. DC voltage is scaled
so that 4V DC represents 2 times full rated DC output
bridge current. See parameter 615, Rated Armature
Bridge Current.
CURRZERO (NOT) signal used as a logic input to the
current control firmware for zero current detection.
This is a latched signal.
Not Used
PHASE LOSS (NOT) signal used as a logic input to
the current control firmware for phase loss detection.
This is a latched signal.
Output from overcurrent logic for DC current fault
detection.
ARMCURRINTG signal representing the output of
the Charge Balance current feedback circuit used to
provide armature current feedback information for
control of armature current.
Not Used
ENCB signal indicating the frequency of the B
channel encoder feedback.
ENCEN signal used to enable the injection of an
encoder test signal to the encoder feedback circuit.
ENCEN is logic 1 when the test operation is disabled
and the normal operation of the encoder feedback
signal is enabled.
DC voltage representing DC armature current as
sensed by the DC current sensing device. DC voltage
scaling is set so that 8V DC represents 4 times full
rating of the armature bridge (this is the trip level).
This signal is used only for DC overcurrent detection.
6
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