Omron PRT1-COM Operation Manual page 169

Troubleshooting
0 wd
No. Error content
1 I/O Unit error (high-den-
sity connector type)
(TS led = red on)
2 Communications power
supply overcurrent to an
I/O Unit
(TS led = off)
3 I/O Unit interface error
(TS led = red on)
4 Configuration error
(TS led = red on)
5 Special I/O Unit error
(TS led = flashing green)
160
I/O Unit Connection Information
1: Error (OR of bits 0 to 4)
1: Refreshing I/O
Error and Registered I/O Unit Addresses
+1 wd
Probable Causes of Errors and Countermeasures
Use the status area to determine the error content and the I/O Unit address
where the error occurred, and then take action according to the following table.
Probable cause
A hardware error has occurred in
an I/O Unit.
The power supply to the I/O Unit
interface has shorted.
The current consumption of the
I/O Unit interface exceeds 0.3 A.
The end connector is not con-
nected.
The I/O Unit Connecting Cable is
broken.
There is a lot of noise.
Too many I/O Units are con-
nected.
(US led = flashing green)
The I/O Unit configuration was
changed while the Communica-
tion Unit was turned ON.
A specific error, such as no oper-
ating power supply, has occurred
in a Special I/O Unit.
Bit
1: Special I/O Unit Error
1: Configuration Error
1: I/O Unit Interface Error
1: I/O Unit Power Supply Overload
1: I/O Unit Error (High-density Connector Type, 32 bit I/O)
The bits corresponding
The bits corresponding
to registered I/O Units
to I/O Unit with errors
are turned ON. Bits 0 to
are turned ON. Bits 8 to
7 correspond to
15 correspond to
addresses 0 to 7.
addresses 0 to 7.
1: Registered
1: Error
0: Not registered
0: No error, or not
part of network
Replace the I/O Unit in which the hardware error
has occurred.
Check that the I/O Units and their communication
cables have not shorted.
Check that the total current consumption of the
communications power supply for the I/O Units
does not exceed 0.3 A.
After taking the above measures, restart the
Communication Unit. If the problem persists,
replace the Communication Unit.
After turning OFF the power supply to the Com-
munication Unit and all I/O Units, attach the end
connector to the I/O Unit interface connector 2 on
the terminal I/O Unit.
Replace the broken cable.
Remove the source of the noise.
Connect no more than 8 I/O Units for each Com-
munication Unit.
After taking the above measures, restart the
Communication Unit. If the problem persists,
replace the Communication Unit.
After turning OFF the power supply to the Com-
munication Unit and all I/O Units, return to the
correct I/O Unit configuration, and restart the
Communication Unit. If the problem persists,
replace the Communication Unit.
Check the operating power supply, and provide
the correct power supply. If the problem persists,
replace the Special I/O Unit in which the error
occurred.
Section
Bit
Countermeasure
9-2