α
2 Simple Application Controllers
Diagnostics 15
ENG-94
15.4 Cannot enter Run Mode.
When the α2 series will not switch to Run mode, check the following.
1) The message “Input Error” or “Output Error” is displayed on the screen.
The program included in the memory cassette has more points of input and/or output than
is allowed in the controller body.
a) When making the program with the programming software.
The content of the program and the model are checked with the programming software.
Write the program to the
α2 series controller and do not use a memory cassette.
b) When making the program with the
α2 series front panel keys.
Remove the memory cassette, and make the program again.
c) Install the memory cassette in the
α2 series of 24 point type.
d) Write the program in an
α2 series of the same type in which the program will be used.
2) The program data has an error.
When the program cannot be displayed with “ProgEdit” in “TopMenu”, it is possible that the
program data was damaged. Switch from “TopMenu” to the Run mode after deleting the
program.
a) The program again and switch to Run mode.
b) Consult a Mitsubishi Distributor when unable to switch to the RUN mode.
15.5 Incorrect Clock Data
Confirm the following item.
1) The time data is lost.
When approximately 20 days or more (25°C.) have passed since power was supplied to the
α2 series, the time data is lost. In this case, the time data should be set.
Further information about setting the time data can be found in the
α2 Programming
Manual.
2) There are keep advancement by the time data and keep a delay.
The accuracy of the time data is ±5 seconds a day. Use the time correction function when
the time data error increases.
Further information about setting the time correction function can be found in the
α2
Programming Manual.
15.6 The “?” appears on the Display
The “?” mark is displayed when an unacceptable key is
pressed according to the screen data. Confirm the
acceptable options and press the appropriate key.
?
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