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TB024 Rev1 Servo Drive Troubleshooting
Servo3IO Troubleshooting
Symptom Possible Cause Corrective Action
Drive on line LED off Logic Power not applied Measure +5V and +12V at the connector
correct supply problems
Motion control card hasn't booted
up Start software wait for the main screen to
load
Fibers 4 and 5 connected
incorrectly or faulty Check connections one at a time swap
with a known good set of fibers
"Servo Power Removed" due to
fault Restart system to reset runaway or other
serious fault condition
Incorrect HEX file Make sure CNC8 HEX is loading and
there is no CNC9 HEX file
LEDs on but motor
doesn't run Axis Fuse blown Check fuses with a meter replace as
necessary
LEDs on but motor
doesn't run Limits tripped Push down the limit defeat switches
No analog output or non
linear output Incorrect Parameter 31 setting Set P31 to 1 or 2 depending on which
COM port is being used
No communication to analog
section Check DB9TXS fiber and COM port
PLC Failure detected Motion control card hasn't booted
up Start software wait for the main screen to
load
Fibers 1 2 or 3 connected
incorrectly or faulty Check connections one at a time swap
with a known good set of fibers
Incorrect PIC on CPU7 Install CPU711 PIC
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DC3IO Troubleshooting
Symptom Possible Cause Corrective Action
All status LEDs out Logic power not applied Measure +5V and +12V at the connector
correct wiring or supply problems
USV LED out No motor voltage Measure voltage at input terminals check
contactors wiring and fuses accordingly
 Insufficient motor voltage Voltage should be over 30 VDC
DF LED out Motion control card hasn't
booted up Start software wait for the main screen to load
 Fibers 4 and 5 connected
incorrectly or faulty Check connections one at a time swap with a
known good set of fibers
 "Servo Power Removed" due
to fault Restart system to reset runaway or other
serious fault condition
 Incorrect HEX file Make sure CNC8 HEX is loading and there is
no CNC9 HEX file
PLC OK LED out Motion control card hasn't
booted up Start software wait for the main screen to load
 Fibers 1 2 or 3 connected
incorrectly or faulty Check connections one at a time swap with a
known good set of fibers
 Incorrect PIC on CPU7 Install IO2PIC
LEDs on but motor
doesn't run Axis Fuse blown Check fuses with a meter replace as necessary
 Limits tripped Push down the limit defeat switches
No analog output or non
linear output Incorrect Parameter 31 setting Set P31 to 1
XVCC LED out Overload has damaged PLC
section Return for Repair
+12 12 or +5 LED out Overload has damaged
analog section Return for Repair
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Servo1 / Quad Drive Troubleshooting
Symptom Possible Cause Corrective Action
All Status LEDs out Logic power not applied Measure +5V and +12V at the connector correct
wiring or supply problems
UV LED out No motor voltage Measure voltage at input terminals check
contactors wiring and fuses accordingly
Insufficient motor voltage Voltage should be over 30 VDC
USV LED out & UV
LED on Switcher power supply bad Return for repair
DF LED out Motion control card hasn't
booted up Start software wait for the main screen to load
Fibers 4 and 5 connected
incorrectly or faulty Check connections one at a time swap with a
known good set of fibers
"Servo Power Removed" due
to fault Restart system to reset runaway or other serious
fault condition
Incorrect HEX file Make sure CNC8 HEX is loading and there is no
CNC9 HEX file
LEDs on but motor
doesn't run Axis Fuse blown Check fuses with a meter replace as necessary
Limits tripped Unplug limit switch cable and defeat limits on
drive to see if this is the problem
Drive Fault Cable Unplug drive fault cable and defeat drive fault
signal to see if this is the problem
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 SD3 / SD1 Troubleshooting
Symptom Possible Cause Corrective Action
Logic Power LED off Logic Power to drive not
applied Measure Logic power at drive Logic Power
VM It should be at least 100 VDC
Drive Power LED off No Motor Voltage Measure voltage at input terminals VM+ VM
check contactors wiring and fuses
accordingly
LEDs on but motor doesn?t
run Axis Fuse blown Check fuses with a meter replace as
necessary
Incorrect HEX file Make sure CNC9 HEX is loading
Limits tripped Check Limits
Bad drive Return for repair
X Y Z W axis Servo Drive
Data Input or Output Error Logic Power to drive not
applied Measure Logic power at drive Logic Power
VM It should be at least 100 VDC
No communication to /
from SD1 Check Ribbon Cables to other drives
Bad Drive Return for repair
Document History
Rev1 Created on 1999 08 16