Special data registers for error information, General error codes – IDEC MicroSmart User Manual
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29-3
Special Data Registers for Error Information
Two data registers are assigned to store information on errors.
General Error Codes
The general error code is stored to special data register D8005 (general error code).
When monitoring the PLC status using
WindLDR
, the error code is displayed in the error code box under the Error Status in
the PLC Status dialog box using four hexadecimal digits 0 through F. Each digit of the error code indicates a different set
of conditions requiring attention. After the error code is cleared as described on the preceding page, the error code box is
left blank.
For example, the error code may read out “0021.” This indicates two conditions requiring attention, “User program sum
check error” from the third chart and “Power failure” from the fourth chart. If the read-out displays “000D,” this indicates
three conditions exist from only the fourth chart.
D8005
General Error Code
D8006
User Program Execution Error Code
Error Code: Most Significant Digit
F000 E000 D000 C000 B000 A000 9000 8000 7000 6000 5000 4000 3000 2000 1000 0000
I/O bus initialize error
X
Error Code: 2nd Digit from Left
F00
E00
D00
C00
B00
A00
900
800
700
600
500
400
300
200
100
000
User program writing error
X
X
X
X
X
X
X
X
CPU module error
X
X
X
X
X
X
X
X
Clock IC error
X
X
X
X
X
X
X
X
Error Code: 3rd Digit from Left
F0
E0
D0
C0
B0
A0
90
80
70
60
50
40
30
20
10
00
TIM/CNT preset value sum check error
X
X
X
X
X
X
X
X
User program RAM sum check error
X
X
X
X
X
X
X
X
Keep data error
X
X
X
X
X
X
X
X
User program syntax error
X
X
X
X
X
X
X
X
Error Code: Least Significant Digit
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
Power failure
X
X
X
X
X
X
X
X
Watchdog timer error
X
X
X
X
X
X
X
X
Data link connection error
X
X
X
X
X
X
X
X
User program EEPROM sum check error
X
X
X
X
X
X
X
X