<2. Basic Design and Function Design>
● For System Expansion
STARDOM allows intermixing of FCN-500 and FCN-RTU of different revisions
within a system. When implementing system expansion through addition of a new
FCN-500 and FCN-RTU to an existing system, consider whether to use the latest
revision for the new FCN-500 and FCN-RTU or to match the existing system
revision.
Consider the pros and cons described below, and decide whether to use the latest
revision for the new FCN-500, FCN-RTU and intermix different FCN-500, FCN-
RTU revisions within the system, to standardize revisions throughout the system
by downgrading the new FCN-500, FCN-RTU to match the existing system
revision, or to standardize to the latest revision throughout the system by
upgrading the existing system.
• Using the latest revision
In this case, all supported functions can be used.
However, beware that the operation specifications of some functions may
have changed due to functional enhancements included in the revision
upgrade so that the expanded system may behave differently from the existing
system. Furthermore, system revision control may be more tedious with
intermixing of FCN-500 and FCN-RTU s of different revisions.
• Matching the existing revision
In this case, the new FCN-500 and FCN-RTU will behave the same as the
existing system but new functionality included in the latest revision will not be
available. However, system revision control will be easier with a standardized
FCN-500 and FCN-RTU revision throughout the system.
The FCN-500 is used R4.02 or later.
● Procedure for System Downgrade
The procedures are essentially the same for downgrading and upgrading the
revision of in-house equipment to match the revision of an existing system for the
purpose of system modification or system expansion engineering.
When upgrading, use the DVD-ROM for the latest system revision; when
downgrading, use the DVD-ROM for the required system revision instead.
Observe the following precautions for downgrading the FCN/FCJ Basic Software.
• Precautions when downgrading FCN/FCJ Basic Software
FCN-500 can not be downgrading before than R4.02.
FCN-RTU can not be downgrading before than R2.10.
To downgrade a system, follow essentially the same procedure for system
upgrade by decompressing the Basic Software stored on the DVD-ROM for
the required revision to the PC, and then issuing an “FcxRevup” command at
the command prompt but include a “-s” option.
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