User`s manual

22 www.rabbit.com EM1500 Specifics
4.1.1 User LED Patterns
The User LED on the front panel is a bi-color LED. It has a red and a green chip within, which provides a
total of four states: off, red, green and orange. It indicates the overall status of the EM1500 as follows:
You may increase the functionality of the User LED to include the status of the Tx and Rx lines for one or
more of the serial ports. Please see “LED shows Tx/Rx state in run mode” on page 39 for instructions on
how to do this.
Reset button
The unit is reset whenever the reset button is pressed. The operating mode
is usually determined by how long the reset button is held down:
• 0 to 4 sec - Normal run
• 4 to 10 sec - Run in local configuration mode
• over 10 sec - Reset to factory defaults, run in local config mode.
Table 4.2 User LED Patterns
LED pattern Status of EM1500
OFF Initializing after power-up or reset.
Solid Red
Run mode, with a valid IP address assigned to the Ethernet
interface.
Orange with brief off-period
every second
Run mode, but no IP address has been obtained. This means
the unit has not been configured, or it has been configured to
use DHCP but no DHCP server is available, and no fallback
IP address was identified.
Flashing green 4 times per
second
Reset has occurred, reset button has been pressed down for
more than 4 seconds but less than 10 seconds.
After the reset button is held down for 10 seconds total time,
the LEDs will go OFF and the unit will be reset to factory
default configuration.
Alternating green and
orange, 2 times per second
Factory default configuration mode. After configuring the
unit for the first time, you may reset the unit by pressing the
reset button to make the LEDs indicate normal run mode,
i.e., solid red.
Alternating red and green
every second
Special self-test mode. This mode is only used by the
factory, so you should not normally observe this mode.
Any other pattern (usually
green flash followed by one
or more red flashes)
Self-test or other internal error. If you see this mode, contact
technical support.
Table 4.1 Front Panel Description
Connector Description of Use