Allen-Bradley GuardPLC 1753, Safety Reference Manual

Page: 62 / 120

62 Publication 1753-RM002C-EN-P - September 2008
Chapter 5 GuardPLC DeviceNet Safety Scanner
Status Indicators
Options for viewing the DeviceNet safety scanner’s status are listed in
the following sections.
Alphanumeric Display
When you apply power to the scanner, the alphanumeric display
cycles through the following information.
•
Firmware revision
•
MAC ID
•
DeviceNet communication rate
The scanner also displays status codes that provide diagnostic
information. Refer to the DeviceNet Safety Scanner for GuardPLC User
Manual, publication 1753-UM002, for information on status and error
codes.
Status Indicators
The scanner has three status indicators that let you monitor module,
DeviceNet network, and High-speed Protocol (HSP) status. The
evaluation of system variables that contain the status value of the
scanner can also be monitored in RSNetWorx for DeviceNet software.
For a detailed description of the status indicators, refer to the
DeviceNet Safety Scanner for GuardPLC User Manual, publication
number 1753-UM002.
IMPORTANT
Status indicators and alphanumeric displays are not reliable
indicators for safety functions. They should be used only for
general diagnostics during commissioning or troubleshooting.
Do not attempt to use status indicators as operational
indicators.