User`s guide

Chapter 7: Troubleshooting and Reconfiguring Series D8 User’s Guide
162 Watlow Anafaze Doc. 0600-3120-2000
Reading the DeviceNet Indicator Lights
The Module Status Indicator Light indicates whether or not the
device has power and is operating properly. The following
chart is the definition of valid states available to this indicator:
Table 7.3 Module Status Indicator States and
Descriptions
Control mode of one
or more loops
changes from auto-
matic to manual
Failed sensor
Check the display or HMI software for a
failed sensor message.
BCD job selection feature
loaded a different job
Check whether the new job was supposed
to be loaded. If not, check the BCD job
load setup:
Check the settings of the BCD job load
parameters in the Global setup menu.
Use the Digital inputs parameter in the I/O
tests menu to test the BCD job load
input(s).
Check the device that is used to activate
job selection.
All loops are in man-
ual mode at 0 per-
cent power
Intermittent power
Check wiring and service. See Wiring the
Power Supply on page 23.
Use a separate dc supply for the controller.
Provide backup power (uninterruptible
power system).
In the Global menu, set the Power up loop
mode parameter to from memory if safe for
your application. See Power Up Loop
Mode on page 128.
Hardware failure
Check the controller display for a hardware
alarm. See System Alarms on page 160.
Controller does not
behave as expected
Corrupt or incorrect values in
RAM
Clear the RAM. See Clearing the RAM on
page 169.
Device State Indicator Light State Description
Power Off Off No power applied to device.
Device Self-Test Flashing Green-Red Device is in Self-Test.
Device Operational Green Device is operating normally.
Unrecoverable Fault Red
Device has detected an unrecoverable
fault. All module level faults are considered
unrecoverable.
Symptom Possible Causes Recommended Action