IBM z13s Technical Manual page 445

Adjust time by up to plus or minus 60 seconds.
Schedule changes to the offsets listed. STP can automatically schedule Daylight Saving
Time, based on the selected time zone.
Monitor the status of the CTN.
Monitor the status of the coupling links that are initialized for STP message exchanges.
For diagnostic purposes, the PPS port state on a z13s server can be displayed and fenced
ports can be reset individually.
STP window enhancements
The z13s STP windows are enhanced to show the following additional or enhanced
information:
The new Integrated Coupling Adapters (ICAs) are added to the list of possible
STP-supporting Coupling Links.
A new task role is added within the Customize User Controls window that allows the
enablement of the View System (Sysplex) Time option. This option provides view-only
access to the STP windows for each individual user role.
The Initialize Time window shows the current values of leap second offset, time zone, and
'date and time' if the CTN time was set before.
Set Date and Time is modified so that Use External Time Source (ETS) is the first option.
This configuration should encourage the user to select the NTP option (if their system is
configured for NTP) because a NTP-set time is more precise compared to a user-set time.
With Driver 22 and later, the HMC Enable for time synchronization task was moved from
the "Add (or Modify) object definition" window to the Customize Console Date and Time
window. This function synchronizes the HMCs date and time to either an NTP server (if
defined) or to a SE Date and Time, with the NTP server option provided as the first choice.
Chapter 11. Hardware Management Console and Support Elements
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