Mitsubishi Melsec-A Series User Manual page 137

8. TROUBLESHOOTING
/MELSEC
8. TROUBLESHOOTING
Errors may be detected by:
1) the AD71 CPU; or
2)
t h e
A6GPP during program development and debugging.
This section describes errors detected by the AD71 CPU, for other
errors see the SWOGP-AD71P Operating Manual.
8.1 Erron
Detected
by AD71
The AD71 has various error check functions. When an error occurs,
an error code is written to address 45 ( X axis) and 345 (Y axis) in
the buffer memory.
(1) A new error will overwrite the previous one in the buffer mem-
ory.
(2) Error code
"0"
indicates no error.
(3) Error reset
Errors are reset
by writing a "1" to buffer address 201.
(See
Section 6.3.2 (71, page 6-14.)
For resetting of errors using the AGGPP, refer to the SWOGP-
AD71P Operating Manual.
(4) Error detection
XB is the error detection flag. Resetting the error also resets XB.
Error codes are classified as shown in Table 8.1.
1
Error
code
I
Error Classification
I
Remarks
I
I
1 t o 4 9
I
Data range error
I
Refer to Section 8.1.1.
I
50 to 59
Refer to Section 8.1.3.
Buffer memory write disable error
60
to
69
Refer to Section 8.1.2. AD71 HOLD error
70
to
79
Refer to Section 8.1.5. AD71 BUSY stop error 80 to 89
Refer to Section 8.1.4. AD71 start and operation error
Table 8.1 Error Code Classification
8- 1
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