5.4 Combination Test Precautions
Combination test goes beyond the control applications of FCN-500 or FCN-RTU.
With the FCN-500 or FCN-RTU connected to graphics, higher-level computers and
other equipment through various means of communication, combination test verifies
whether the system as a whole operates correctly, whether it operates correctly
even in the event of failures, and whether there are any inconsistencies in the
requirement specification.
5.4.1 Combination Test Prerequisites
Before starting combination test, ensure that the following preconditions are met.
• Unit test of FCN-500, FCN-RTU is completed.
The purpose of combination test is to test the operation of the system as a
whole.
When a problem is detected in combination test, it takes time to pinpoint whether
the cause lies in the control application itself or other system components. The
test is interrupted if control application has bugs.
To avoid this, always complete unit tests of FCN-500 or FCN-RTU control
applications before starting combination test.
• Unit tests of graphics and displays are completed.
For the same reason explained earlier for FCN-500 or FCN-RTU control
applications, always complete unit tests for any graphics and displays to be
connected before starting combination test.
• Communication is successfully established for communication
applications.
For equipment to be connected through various means of communication,
ensure that communication is successfully established and data sending and
receiving is allowed before starting combination test.
5.4.2 Equipment Used for Combination Test
Combination test is intended for testing not just the control application, but the
system as a whole. As such, we recommend using target equipment for combination
test is recommended.
Using In-house equipment during combination test may result in following:
1. Any problems faults in hardware will go undetected
2. Any missing licnese on target system will go undetected
To avoid these problems, use target equipment during combination test if possible.
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