CONTREX CX-1200 - Manual (Page 301)

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HARDWARE TESTS / MEMORY P1/3
Use the Hardware Tests / Memory (page 1) to test the CX-1200's memory. Enter the number in Memory
Test (CP-490) that corresponds to the section of memory that you want to test (see list below), then press the
Enter key. To test all three sections, enter a “4”, then press the Enter key.
4 = Test ALL MEMORY
3 = Test NVRAM
2 = Test SRAM
1 = Test ROM
0 = Test Done
You can also refer to page 1 of the Memory Test's (CP-490) Help screen for the test list and the
corresponding numeric codes. You can enter a test from the Help screen by scrolling the highlight bar to the
test and pressing the Enter key.
When the test(s) are complete, the ROM Test (MP-94), SRAM Test (MP-95) and NVRAM Test ( MP-96)
will update and indicate whether the test passed or failed. A message will flash in the message bar, as well.
At the completion of the test, the value of Memory Test (CP-490) will automatically return to “0” (test done).
If any test fails, contact Contrex Technical Support at (763) 424-7800 or (800) 342-4411.
Memory Test
To test the physical memory, either enter the number associated with the test (see list below) in Memory Test (CP-490)
or go to the Help screen for Memory Test (CP-490) and choose the test. The test result will flash in the error and
message status bar at the bottom of the screen and is also summarized in the Diagnostics/Device Tests Memory
screen. The test results are also available through Monitor Parameters MP-94, MP-95, MP-96.
4 = Test ALL MEMORY
3 = Test NVRAM
2 = Test SRAM
1 = Test ROM
0 = Test Done
ROM Test
ROM Test (MP-94) displays the result of the most recent ROM Test. ROM Test runs a checksum test on the CX-1200
program memory.
1 = Memory Test Fail
0 = Memory Test Pass
SRAM Test
SRAM Test (MP-95) displays the result of the most recent SRAM Test. SRAM Test runs a read/write test on the
scratch-pad memory.
1 = Memory Test Fail
0 = Memory Test Pass
NVRAM Test
Non Volatile RAM Test (MP-96) displays the result of the most recent Non Volatile RAM Test. The test runs both a
read/write and a checksum test on the nonvolatile memory. The parameter values, the PLC program and the backups
are all stored in this memory.
1 = Memory Test Fail
0 = Memory Test Pass