Use this command to display the local standard time (LST) for the TPF
system or subsystems, or the current time and characteristics of the Sysplex
Timer.
Requirements and Restrictions
None.
Format
- SYS
- displays only the system clock.
- ALL
- displays the system clock and all subsystem clocks that are above 1052
state.
- TOD
- displays the current value of the TOD clock as well as clock
synchronization information.
- STR
- displays the current time and characteristics of the Sysplex Timer.
This parameter is valid only for a central processing complex (CPC) that is
directly connected to a Sysplex Timer.
If the CPC is in Sysplex Timer stepping mode, the active stepping port is
used. If the CPC is not in Sysplex Timer stepping mode, the port that
would become the active stepping port is used.
- Note:
- Retrieving data from the Sysplex Timer may take several seconds. If
the TOD clock was set to use the Sysplex Timer time, enter ZDTIM
TOD to display the time.
- ALTPORT
- displays the current time and characteristics of the Sysplex Timer on the
port that is not the active stepping port. This parameter is valid only
with the Sysplex Timer and is not allowed when running under Processor
Resource/Systems Manager (shared PR/SM).
Additional Information
- Enter ZDTIM (with no parameters) to display the subsystem local
standard time. Use this time as the base time for changing the system
time-of-day (TOD) clock.
- The system clock is not running when the basic subsystem (BSS) is in 1052
state.
- When the TPF system is in 1052 state and a time-of-day (TOD) message is
generated, the hours and minutes portion of the TOD clock message is stored
instead of the LST message.
- When you display the subsystem LST clock and the subsystem is in 1052
state, the TPF system calculates the subsystem LST based on the system clock
and the time difference between the system clock and the subsystem
clocks.
- Use the system local standard time that is displayed when you specify the
TOD or STR parameters as the base for changing the system time-of-day (TOD)
clock.
- The Sysplex Timer applies the same Greenwich mean time (GMT) offset as the
TOD clock.
- Because the ZDTIM STR command displays the Sysplex Timer time value and
the TOD value, use the TOD clock value as the verification time based on the
ZATIM command.
- The TPF system uses the hours and minutes (hh.mm.)
portion of the LST message for verification if you enter a subsequent request
to change the system or subsystem time.
- If there is no master processor in the complex, the master processor ID
and serial number are not displayed.
Examples
The following example displays the local standard time for the BSS.
+--------------------------------------------------------------------------------+
|User: ZDTIM |
| |
|System: DTIM0001I 14.55.15 SUBSYSTEM BSS LOCAL STANDARD TIME |
+--------------------------------------------------------------------------------+
The following example displays the current value of the TOD clock.
+--------------------------------------------------------------------------------+
|User: ZDTIM TOD |
| |
|System: CLKS0010I 13.34.05 TIME OF DAY CLOCK LOCAL STANDARD TIME |
| TIME: 13.34.05 DATE: 05/23/94 |
| CLKS0081I 13.34.05 SOURCE: MASTER STATUS: CONFIRMED |
| MASTER- CPUID: B SERIAL: 020410 MODEL: 3090 |
+--------------------------------------------------------------------------------+
Related Information
See TPF Main Supervisor Reference and TPF System Generation for more information about the
system clocks.