Omron SmartSlice GRT1-OD4G-1 Operation Manual page 306

LED Indicators and Error Processing
Unit LED
name
Slice I/O Unit ERR1
(GRT1-TS2@)
GRT1-OD4G- PWR
3
GRT1-PD2, IO
GRT1-PD8, PWR
and GRT1-
PD8-1
I/O Power
Feed Units
or
GRT1-PC8,
and GRT1-
PC8-1
I/O Power
Connection
Units
GRT1-PD2G I/ ERR
O Power Feed
Unit
GRT1-TBL UNIT
Left Turnback PWR
Unit
IO
PWR
286
Color Status
Red Input error occurred in input 1. Check the following items.
Cold junction compensator
error occurred.
--- There is no input error for
input 1. (Not lit when input
error detection is disabled
using the input error detec-
tion disable setting.)
Green I/O power and Unit power are
being supplied.
--- I/O power or Unit power is not
being supplied.
Green I/O power is being supplied
normally.
--- I/O power is not being sup-
plied to the Unit.
An overcurrent has occurred.
Red An overcurrent has occurred.
--- An overcurrent has not
occurred.
Green Unit power supply is providing
power normally.
--- Unit power supply is not being
supplied to the Unit.
Green I/O power supply is providing
power normally.
--- I/O power supply is not being
supplied to the Unit.
Lit
Meaning
• Check if the sensor is disconnected, never
was connected, short-circuited, or wired
incorrectly.
• Check the terminal block to see if it is dis-
connected.
• If using a 2-wire connection, check to be
sure the SHT terminals are shorted.
• Check the sensor to see if it is of the cor-
rect input type.
• Check to see if the temperature is outside
the convertible temperature range.
Check the cold junction compensation
(GRT1-TS2T only.)
---
Check whether power is being supplied by
the I/O power supply and Unit Power Sup-
ply.
---
Check whether power is being supplied
from the I/O power supply.
Check the ERR indicator on the GRT1-
PD2G only.
Remove the overcurrent, and then turn the
power supply OFF and ON or input a reset
signal.
---
---
Check whether power is being supplied by
the Unit power supply.
---
Check whether power is being supplied by
the I/O power supply.
Not lit Flashing
Section 9-2
Likely cause of error