User`s manual

Western Reserve Controls, Inc. 1782-JDC User’s Manual
15
4.2 LED Operation
4.2.1 DeviceNet LEDs
The JDC has two LEDs that provide visual status information to the user about the product
and the DeviceNet network. See Tables 5-1 and 5-2 that follow below for how to interpret LED
status indications.
Table 4-1 Module Status LED (labeled MS)
LED State Module Status Meaning
OFF No Power There is no power through DeviceNet.
Green Device Operational JDC is operating normally.
Flashing Green Device in Standby JDC needs commissioning (e.g. attempting
autobaud).
Flashing Red Minor Fault Recoverable fault.
Red Unrecoverable Fault JDC may need replaced.
Flashing Red/Green Device Self-Testing JDC is in self-test mode.
Table 4-2 Network Status LED (labeled NS)
LED State Network Status Meaning
OFF No Power / Not on-line JDC has no power or has not completed the
Dup_MAC_ID test.
Flashing Green On-line, not connected JDC is on-line but is not allocated to a
Master.
Green On-line JDC is operating normally.
Flashing Red Connection time-out One or more I/O connections are timed out.
Red Critical link failure JDC has detected an error that makes it
incapable of communicating on the link. (Bus
off or Duplicate MAC ID).
4.2.2 Serial Port LEDs
The JDC also has two (2) RS-232/422/485 activity LEDs: one for transmit (TX) and one for
receive (RX). Each of these will illuminate when there is data communications active on the
respective data lines.