Symmetricom 1000 User Manual
Chapter 6 Maintaining and Troubleshooting the TimeProvider
Diagnosing the IOC
Diagnosing the IOC
158 TimeProvider User’s Guide
097-58001-02 Revision G – April 2008
Interpreting Error Messages
Error messages appear on the console as they occur, and include the time and date
of occurrence. Refer to the event codes described in
of occurrence. Refer to the event codes described in
and to the alarm
Compatibility Alarm
If you receive a COMPAT alarm, then one or more of the installed hardware and/or
software components is not compatible with other components. Refer to the
Software Release Notice (097-58001-22) for a list of compatible components and
firmware revision levels. If necessary, update the firmware in one or more
components using the procedures in
If you receive a COMPAT alarm, then one or more of the installed hardware and/or
software components is not compatible with other components. Refer to the
Software Release Notice (097-58001-22) for a list of compatible components and
firmware revision levels. If necessary, update the firmware in one or more
components using the procedures in
Removing the IOC
You can remove either of two IOCs in a shelf without affecting outputs. If you need
to remove the only IOC in a shelf, or remove both IOCs from a shelf, outputs are
interrupted and will resume once one IOC has achieved lock on an input signal.
to remove the only IOC in a shelf, or remove both IOCs from a shelf, outputs are
interrupted and will resume once one IOC has achieved lock on an input signal.
IOC Memory
The IOC stores its configuration and the configuration of the redundant IOC, if it is
installed. This configuration information is stored in non-volatile memory, and is
retained even if the IOC is removed from the shelf. The IOC also stores the
configuration of the IMC. The configuration of the IMC is stored in volatile memory
and is lost if the IOC is removed from the shelf.
The IOC stores its configuration and the configuration of the redundant IOC, if it is
installed. This configuration information is stored in non-volatile memory, and is
retained even if the IOC is removed from the shelf. The IOC also stores the
configuration of the IMC. The configuration of the IMC is stored in volatile memory
and is lost if the IOC is removed from the shelf.
Removing the Only IOC
To remove the only IOC in a shelf, use the following procedure. Output signals will
be interrupted; they will resume once the IOC has achieved lock on an input signal.
To remove the only IOC in a shelf, use the following procedure. Output signals will
be interrupted; they will resume once the IOC has achieved lock on an input signal.
1. Save the contents of the IOC memory in the IMC by issuing the following command:
CPY-MEM:::::IOC,IMC,IOC;
This command may take more than two seconds to execute; if it does, then the
In-Process response is issued. See the TimeProvider TL1 Reference Guide for
more information on the CPY-MEM command.
In-Process response is issued. See the TimeProvider TL1 Reference Guide for
more information on the CPY-MEM command.
2. Issue the following command to take the IOC out of service:
ED-EQPT::IOCm:::IOCSTATE=OOSRV;
where m is 1 or 2, and determines which IOC you take out of service.
3. Attach a wrist grounding strap and connect it to the TimeProvider chassis.