Controller Health Status shows Ring-loop failure message

[Hernan_Urueña]

Issue

After transitioning TAC INET Access to Security Expert, SP-C health status shows the message "Ring-loop failure at reader expander".

Product Line

EcoStruxure Security Expert, TAC INET

Environment

•  Security Expert SP-C
•   TAC INET Access Control

Cause

This message indicates that the ring-loop connection is not made. 

For the ring-loop connection, the opposite end of the INET subLAN must be connected to Reader 2 on the SP-C.

Resolution

This message can be ignored if an INET subLAN loop is not used.

• The Ring-loop Failure error can be avoided by running a jumper wire from Reader 1 pin D0 to Reader 2 pin D0, and another jumper wire from Reader 1 pin D1 to Reader 2 pin D1 on the SP-C that is hosting the INET subLAN

If an INET subLAN loop is used, this message indicates a break in the ring loop. 

Reference Guide I/NET Access Control Transition to EcoStruxure™ Security Expert (Hardware           ...