Diagnostics and Troubleshooting PLX3x Series
User Manual Ethernet and Serial Gateways
Page 34 of 218 ProSoft Technology, Inc.
May 26, 2016
3.1 LED Indicators
Troubleshooting can be performed using several methods.
The first and quickest is to scan the LEDs on the gateway to determine the
existence and possibly the cause of a problem. The gateway’s LEDs provide
valuable information such as
The state of each port
System configuration errors
Application errors
Fault indications
3.1.1 Main Gateway LEDs
Power is not connected to the power terminals or source is
insufficient to properly power the gateway (208 mA at 24 VDC is
required).
Power is connected to the power terminals.
A critical error has occurred. Program executable has failed or
has been user-terminated and is no longer running. Press
theResetbutton or cycle power to clear the error.
The unit is in configuration mode. Either a configuration error
exists, or the configuration file is currently being downloaded or
read. After power-up, the configuration is read, and the unit
implements the configuration values and initializes the hardware.
This occurs during power cycle or after the Reset button is
pressed.
An error condition has been detected and is occurring on one of
the application ports. Check configuration and troubleshoot for
communication errors.
This error flag is cleared at the start of each command attempt
(Master/Client) or on each receipt of data (slave/adapter/server);
so, if this condition exists, it indicates a large number of errors are
occurring in the application (due to bad configuration) or on one or
more ports (network communication failures).
NS
(Network
Status) for
EIP
protocol
only
IP address obtained; no established connections
Alternating Red
and Green Flash
MS
(Module
Status) for
EIP
protocol
only
Alternating Red
and Green Flash
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