User manual

Publication 1797-6.5.1 - April 1999
Chapter 7
Troubleshooting the FLEX Ex
Analog I/O Modules
What this Chapter Contains
Read this chapter to troubleshoot your I/O module.
Status Indicators
1797-IE8 Module
The 1797-IE8 module has one power indicator that is on when power is
applied to the module and one status indicator for each input.
For information on: See page:
Status Indicators 7-1
Repair 7-2
Chapter Summary 7-2
Indicator Color State Meaning
Status Red On At power up – Channel 0 indicator lights at powerup until
all internal diagnostics are checked. After successful
powerup, the indicator goes off if no fault is present.
After successful powerup – Indicates a critical fault
(diagnostic failure, etc.)
Blinking (when
faults are
enabled, and bit
set)
Indicates a noncritical channel fault
Power Off Module not powered
Green On Module receiving power
Ex
PWR
1797-IE8
8 CHANNEL ANALOG INPUT
IN1IN0 IN2 IN3 IN4
IN5
IN6 IN7
3
40070
A B C
A = Status indicators
B = Insertable labels for writing individual input designations
C = Power indicator