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Chapter 7 – Configuration

GE Reason Switches

REASON SWITCHES-TM-EN-3

217

13 PTP Settings

Precision Time Protocol is an Ethernet protocol that allows IED equipment being

synchronized to a master throughout the Ethernet connection medium. Thus,

synchronization is performed at the same automation network, and no separated

network is required as it is with IRIG-B signals, for instance.

PTP menu is located at Settings



PTP.

 PTP External Clock Mode:

This menu allows configuring external clock parameters to be output by the switch.

Possible configurations are as follows.

T1000, S2020 and S2024G switches do not support external clock output. Thus, these configurations do not take effect.

o One_PPS_Mode: enable PTP output at the 1 PPS (pulse-per-second)

output. Enable will allow the function to be operating and Disable

will disable the pulse-per-second output function;

o External Enable: enable external clock output. Enable will allow the

function to be operating and Disable will disable the external

output function;

o Adjust Method: indicates external clock adjustment method to be

applied. Possible values are as follows:

 LTC Frequency: enable external clock adjustment to be

done by Local Timer Counter frequency control;

 SyncE-DPLL: enable external clock adjustment to be done

by the SyncE DPLL frequency control;

 Oscillator: enable external clock adjustment to be done

by an independent from SyncE oscillator, if the hardware

of the switch has support to;

 LTC phase: enable external clock adjustment to be done

by the Local Timer Counter phase control, assuming that

frequency is locked by SyncE;

 PTP Clock configuration:

This menu allows configuring PTP clock parameters to be applied at the PTP network.

Reason Switches allows creating up to 4 clock instances at the same switch.

GE S2020 User Manual

Questions and Answers: