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Section 3: Configuring the Series 90-30 PCM with the HHP
Freezing the Configuration
Programmable Coprocessor Module parameters can be edited with the Hand-Held
Programmer if you have a Release 3 or later CPU and a Release 2.51 or later PCM. The
parameters are edited in exactly the same manner as for Intelligent I/O Modules
described previously in this chapter.
Processing a change to the PCM’s configuration takes 15 seconds or more. Processing
multiple parameter changes simultaneously takes the same time as processing a change
to a single parameter. Since changing several parameters at once is a common
occurrence, changes to individual parameters are remembered by the module but are
not processed and do not take effect until specifically commanded to do so.
When a PCM parameter is changed, an asterisk (*) will appear before the module name
on the top line of the HHP screen. This indicates that the module’s previous
configuration has been “frozen”, and that the module is not yet using the change(s) you
have just made. You can continue editing, and this and all subsequent changes will be
remembered by the module. However, if power is lost while a module’s configuration is
frozen, the changes (edits) you have made made will be lost.
When the configuration for a module is frozen in this manner, you can tell the system
that editing of all of the parameters is complete by pressing the WRITE and ENT keys.
The edited changes are then processed all at once by the PCM and the asterisk will
disappear from the display, indicating that the new values are being used by the PCM
and have been saved in the PLC’s non-volatile memory.
If you decide to abandon the changes that you have made so far, they can be discarded
by pressing the CLR and ENT keys. If you do this, the configuration parameters will
revert to the values they had before the configuration was frozen.
If you attempt to leave the current slot (either by pressing the , –, or # key) while the
module’s configuration is frozen, you will be prompted to indicate whether to use the
new combination of values, discard the new values and return to the old configuration,
or to continue editing the changes. If you attempt to change the HHP mode or go to
RUN mode, the “FROZEN” error message will be displayed.
Note
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Once changes have been made which are not being used by the
module, you cannot leave the slot until the changes are saved or
discarded.
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Chapter 2 Installing the PCM
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