PLX51-HART-4I / PLX51-HART-4O
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HART Input/Output
Diagnostics
Multidrop Field Devices
User Manual
ProSoft Technology, Inc.
Page 94 of 127
Table 5.1 - Module LED operation
LED
Description
Module
The module LED will provide information regarding the system-level operation
of the module. Thus, if the LED is red then the module is not operating
correctly. For example, if the module application firmware has been corrupted
or there is a hardware fault the module will have a red Module LED.
If the LED is green, then the module has booted and is running correctly.
Ethernet
The Ethernet LED will light up when an Ethernet link has been detected (by
plugging in a connected Ethernet cable). The LED will flash when traffic is
detected.
Channels (0-3)
Each channel LED represents the status of that specific analog channel.
The LED will be green when the loop current is within the acceptable range
(3.8mA to 20.5 mA) and HART communication has been established to the
field device. Otherwise, the LED will be red.
The LED will flash green each time a HART response was received from the
connected field device. If there was a HART communication error (e.g.
checksum failure) then the LED will flash red.
In a Multi-Drop Network, the LED will flash red when any HART device
configured on that channel is no longer present. This is more visible when the
main device (at the fixed address) is not connected, or when the fixed address
for the main device entered does not correspond to any of the devices in the
network.
5.2 Module Status Monitoring in the PLX50 Configuration Utility
The module can provide a range of statistics which can assist with module operation,
maintenance, and fault finding. The statistics can be accessed in full by the PLX50
Configuration Utility or using the web server in the module.
To view the module’s status in the PLX50 Configuration Utility environment, the
module must be online. If the module is not already Online (following a recent
configuration download), then right-click on the module and select the
Go Online
option.
Figure 5.2 - Selecting to Go Online