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19 Display Module (FX3G-5DM)
FX
3G
Series Programmable Controllers
User's Manual - Hardware Edition
19.7 Error Check
19.6.5 Test mode operation notes
1. When using multiple same-number timers (T) and counters (C).
Operation occurs as follows if multiple timers [T] and counters [C] are used in programs which contain CJ
instructions and step ladders.
• When a setting change is performed after switching from the device monitor to the test function mode, the
setting change is applied to the timer [T] or counter [C] which is nearest to Step 0.
• When changing the setting values for same-number timers [T] and counters [C], use the programming tool
to change the program.
2. When the set values of timers (T) and counters (C) are specified indirectly
When the set values of timers (T) and counters (C) are specified indirectly in programs, the values of
indirectly specified devices change if the set values of timers (T) and counters (C) are changed in the display
module.
3. When changing the values of extension file registers (ER and DER)
When the value of an extension file register (ER or DER) is changed, such a change is counted as write to the
EEPROM memory. Be careful not to exceed the allowable number writes.
The allowable number of writes is 10,000 or less for the memory cassette (EEPROM), and 20,000 or less for
the built-in memory (EEPROM).
19.7 Error Check
The main unit's error status displays at the "ErrorCheck" menu.
1) At the menu screen, use the [+] / [-] buttons to move the cursor to
the "ErrorCheck" item, then press [OK].
The error check result then displays at the "error display screen"
(refer to fig. at right).
To cancel the operation and return to the "top screen (time
display)", press [ESC] at the menu screen.
2) If multiple errors have occurred, the [+] / [-] keys can be used to
switch between the error display pages.
Display Content
3) To cancel the operation and return to the "menu screen", press
[ESC].
Button Operation Description
ESC Returns to the "menu screen".
-
1 error or less Disabled
2 errors or more Displays the previous-page’s error screen.
+
1 error or less Disabled
2 errors or more Displays the next-page’s error screen.
OK Returns to the "menu screen".
Display Content
[1]
Active error flag
[2]
Error code
[3]
Number of concurrent errors
(displays only when multiple errors have occurred)
M0856
[1]
[2]
M0806 [1]
[2]
M0836 [1]
[2]
[3]
[3]
+-
When no errors have occurred
When 1 error has occurred
When multiple errors have occurred
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