Troubleshooting - Yamaha SRCD User Manual

CHAPTER2 PROFIBUS Unit
2-15
No. Symptom
1 1)
When using
the master
station
sequencer
line test
2)
function,
unable to
verify from
the master
station
sequencer
3)
(PLC), that
the robot
controller is
4)
correctly
connected to
the
PROFIBUS
5)
system.
6)
7)
1)
2 Servo won't
turn on.
2)
3)
(continued to next page)

Troubleshooting

Check the following items if any problems occur during operation. Also, refer to "Trouble-
shooting" in the controller instruction manual and always refer to the section on trouble-
shooting in the master station sequencer (PLC) instruction manual. If the following items
do not eliminate the problem, promptly contact your Yamaha dealer or Yamaha for assis-
tance.
Causes
PROFIBUS • Check if PROFIBUS cable is not
cable not connected, is miswired, or wires are
correctly broken.
connected.
PROFIBUS unit • Refer to "2-5-1 Validating the
is not validated PROFIBUS unit", and check that the
so cannot be PROFIBUS unit is properly validated.
identified from
controller.
Station address • Refer to "2-5-2 Setting the station
setting is address" and check the station
incorrect. address.
Alarm occurring • Connect the HPB and check for an
on controller. alarm.
• Check if the status LED is lit in red.
PROFIBUS • Check the PROFIBUS cable wiring.
cable length does
not meet
specifications for
the PROFIBUS,
or a terminating
resistor is not
connected.
PROFIBUS • Check the PROFIBUS cable
cable is in installation.
proximity to a
noise source such
as motor/power
lines.
PROFIBUS unit • Replace the PROFIBUS unit.
is defective.
Set to emergency • Check Qn+1.7 status.
stop with Qn+1.7
at OFF.
Set to emergency • Check if set to emergency stop at HPB
stop from HPB or external parallel I/O.
or external
parallel I/O.
Controller alarm • Connect the HPB and check the alarm
was issued. that was issued.
• Status LED is lit up in red.
Checkpoints
136
Remedy
• Correctly repair any miswirings or
unconnected wiring. Replace the
cable if broken.
• Validate the PROFIBUS unit, and
turn on the controller power again.
• Reset the station address correctly,
and turn on the controller power
again.
• Refer to the controller instruction
manual and troubleshoot according to
the particular alarm.
• Repair the wiring.
• Reinstall the PROFIBUS unit away
from the source of noise
(motor/power lines.)
• If this solves the problem, replace the
PROFIBUS unit.
• To turn on the servo (servo-on) set
Qn+1.7 to ON.
• Cancel emergency stop on the HPB
or external parallel I/O in order to set
the servo to on (servo-on).
• Refer to the controller instruction
manual and troubleshoot per the
particular alarm.