4. Troubleshooting (PROFIBUS DP)
RC700 / RC90 Option Fieldbus I/O Rev.14
301
♦
Causes of Error
Possible Cause
Examination Method
Countermeasure
Electrical surges of
device power supply
Measure voltage of the device
power supply at the trouble
unit.
→
It should be within the range
of sufficient voltage for
device operation.
Check voltage of the device
power supply.
Disconnected
terminating resistors
Cable disconnection
Disconnected
connector
Disconnected signal
wire
(1)
Check that terminating
resistors are connected to
both ends of the network.
(2)
Measure resistance
between signal wires with
device power supply OFF.
→
Normal: 100 to 120
Ω
Measuring point: Connection
of the trouble unit
For details, refer to the
section
4.2.3.1 Connection
Problem
.
Fix the problem.
How to find the trouble point:
Remove the terminating
resistor on one end of the
network.
The trouble point is where
resistance changes from 220
Ω
.
Loose connector
Loose signal wire
Check for the connection of
connectors and signal wires.
→
The connectors and signal
wires should be firmly
connected.
Checkpoint: all stations and
all branch taps
For details, refer to the
section
4.2.3.2 Loose
Connector and Signal Wire
.
Connect the connectors and
signal wires again.
Broken unit
Replace the trouble unit with a
new one.
→
Verify whether the problem
is fixed.
Replace the unit with a new
one.
Summary of Contents for RC700
Page 1: ...Robot Controller RC700 RC90 Option Fieldbus I O Rev 14 EM198C4088F ...
Page 2: ...Robot Controller RC700 RC90 Option Fieldbus I O Rev 14 ...
Page 8: ...vi RC700 RC90 Option Fieldbus I O Rev 14 ...
Page 12: ...Table of Contents x RC700 RC90 Option Fieldbus I O Rev 14 ...
Page 340: ...5 Maintenance Parts List 328 RC700 RC90 Option Fieldbus I O Rev 14 ...
