Rockwell Automation 47C626 AutoMax Programming Executive V4.2 - Manual (Page 150)

10Ć6
AutoMax Processors and UDC modules will be deleted by StopĆAll
faults or commands.
The effect of a StopĆAll on data in the rack depends on the data type.
Local tunable data in both AutoMax and UDC application tasks is
always retained. Local data is retained for AutoMax tasks, but not for
UDC tasks. Common memory data, which can be defined in the
Variable Configurator for AutoMax Processors only, is maintained
when it is configured as nonĆvolatile. Otherwise, it is reset to 0. For
I/O data, inputs are retained and continue to be updated, while
outputs are reset (set to 0 or off). Note that the UDC dual port
memory is treated like I/O data in the system.
AutoMax Processors will retain the last values of all local variables
and nonĆvolatile common memory variables. All I/O input values are
retained and continue to be updated. All I/O outputs in the rack and
in any remote I/O racks will be reset.
UDC modules will retain their parameter configuration data, UDC test
switch information, D/A setup configuration, local tunable variables,
and the following input data: feedback registers and UDC task error
log information.
UDC modules will NOT retain local variables and data found in the
following registers, which are considered outputs: command
registers, application registers, the ISCR (interrupt status and control
register), scans per interrupt register, and scans per interrupt counter
register. The UDCĆPMI communication status registers will not be
retained.
For Distributed Power Drive applications, the PMI Processor
connected to UDC modules will react to a StopĆAll as follows. All I/O
in the PMI rack, including the rail I/O and I/O connected to the
Resolver and Drive I/O module, is reset. Because a StopĆAll causes
the CCLK signal being used to synchronize UDC and PMI Processor
communication to be turned off, the UDC and PMI will become
unsynchronized. The PMI Processor reacts to all serious
synchronization problems in the same way: armature and field
current reference will be set to 0, and the PMI Processor will continue
commanding 0 current until it senses discontinuous conduction. At
this point, the PMI Processor will turn off the MĆ contactor output
signal on the Resolver and Drive I/O module in the PMI rack.
10.13 Forcing a Cold Start/Deleting Operating
Systems
At times it may be necessary to cold start the Processor(s) to erase
the contents of RAM. Because of the onĆboard battery backĆup, you
cannot erase the contents of RAM simply by cycling power. To force a
cold start, perform the steps below.
Before proceeding, note carefully that this operation will erase the
contents of RAM for all Processors in the rack and that it will require
reĆloading the AutoMax OS, the rack configuration and all application
tasks. Make certain that you have an accurate backup of all tasks in
the rack, including utility tasks. See 14.3.1 for more information on
utility tasks.
Read all directions carefully before starting the procedure.
1. Turn off power to the system. All power to the rack, as well as all
power leading to modules in the rack, must be off.