Omron DEVICENET#05-2003 - Troubleshooting

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Troubleshooting Section 7-2
7-2 Troubleshooting
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.
Check Flowchart 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.
Status Area Error
Processing
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.
The MULTIPLE I/O
TERMINAL is not operating
normally.
Check the first word of the
I/O Unit interface status
area.
Bit 4
ON
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.
Check the Communications
Unit MS indicator.
Not lit
Lit red
Flashing
red
Lit green
Check the Communications
Unit NS indicator.
Check the Communications Unit
TS indicator.
Input area
First word + 0
First word + 1
Bit 3
ON
Bit 2
ON
Bit 1
ON
Bit 0
ON
START
Lit red
Flashing
red
Flashing
green
Lit green
Not lit
Lit red
Flashing
green
I/O Unit connection information
Error I/O Unit addresses Registered I/O Unit addresses
0 wd
+1 wd