4. Troubleshooting (DeviceNet)
♦
Causes of Error
Possible Cause
Examination Method
Countermeasure
{
Voltage drop of
communications
power supply
Measure voltage of
communications power supply at
the master unit.
→
Normal: 11V or more between
V+ and V-
z
If the voltage is 11 to 14 V, the
unit is a possible cause. Fix the
problem on the unit.
Check voltage of the 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
communications power supply
OFF.
→
Normal: 50 to 70
Ω
z
Measuring point: Connection of
the master
z
For detail, refer to the section
4.1.3.1 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 120
Ω
.
{
Loose connector
{
Loose signal wire
Check for the connection of
connectors and signal wires.
→
The connectors and signal
wires should be firmly
connected.
z
Checkpoint: Between the master
and its slaves
z
For details, refer to the section
4.1.3.2 Loose Connector and
Signal Wire
.
Connect the connectors and
signal wires again.
{
All slaves power
OFF
Measure the power voltage of the
slaves.
(It should be within the range of
sufficient voltage for the slave
operation.)
Supply power to the slaves.
{
Master unit
configuration
(1)
Start applicomIO Console
application and check that the
configuration has no
difference with the network
condition.
(2) Check that the configuration
data were written in flash.
z
For details, refer to the section
4.1.3.6 EPSON RC+ Master
Configuration
.
Change the configuration.
Fieldbus I/O Rev.6
95
Содержание EM07ZS1647F
Страница 1: ...Rev 6 EM07ZS1647F EPSON RC Option Fieldbus I O ...
Страница 2: ...E PSON RC Option Fieldbus I O Rev 6 ...
Страница 8: ...vi Fieldbus I O Rev 6 ...
Страница 11: ...Table of Contents 5 Maintenance Parts List 151 Appendix A applicomIO Upgrade 153 Fieldbus I O Rev 6 ix ...
Страница 12: ...Table of Contents x Fieldbus I O Rev 6 ...
Страница 80: ...2 Installation 68 Fieldbus I O Rev 6 ...
Страница 88: ...3 Operation 76 Fieldbus I O Rev 6 ...
Страница 164: ...5 Maintenance Parts List 152 Fieldbus I O Rev 6 ...
Страница 168: ...Appendix A applicomIO Upgrade 156 Fieldbus I O Rev 6 ...
