Troubleshooting - Omron DEVICENET#05-2003 Operation Manual

Troubleshooting

7-2

Troubleshooting

Check Flowchart
START
The MULTIPLE I/O
TERMINAL is not operating
normally.
Check the first word of the
I/O Unit interface status
area.
Bit 4
ON
Bit 3
ON
Bit 2
ON
Bit 1
ON
Bit 0
ON
Status Area Error
Processing
This section explains the causes of errors, how to determine their locations,
and the actions to be taken when errors occur in a MULTIPLE I/O TERMINAL.
When an error occurs in a MULTIPLE I/O TERMINAL, use the following flow-
chart to find the cause of the error, determine its location, and take the appro-
priate action. The numbers correspond to the numbers in the tables beginning
on page 198.
Input area
First word + 0
First word + 1
I/O Unit error (high-density
connector type)
Communications power supply
overcurrent to I/O Units
I/O Unit interface error
Configuration error
Special I/O Unit error
Status not accessible.
A MULTIPLE I/O TERMINAL status area is available in the first two words of
the MULTIPLE I/O TERMINAL input area in the Master. The contents and
causes of errors can be found by checking this area.
Status Area Configuration
The status area is configured as shown in the following diagram.
Check the Communications
Unit MS indicator.
Check the Communications
Unit NS indicator.
Check the Communications Unit
TS indicator.
0 wd
I/O Unit connection information
+1 wd
Error I/O Unit addresses
Section 7-2
Not lit
Lit red
Flashing
red
Lit green
Lit red
Flashing
red
Flashing
green
Lit green
Not lit
Lit red
Flashing
green
Registered I/O Unit addresses
197