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14 ERROR CODE
14 ERROR CODE
This chapter describes the definitions of the errors that will occur in the QnPHCPU/QnPRHCPU
and the compensation operation to be taken for the errors.
14.1 Error code list
There is the following process control instruction error.
• Error occurred midway through operation Error code: 4100
When an operation error occurs (error code: 4100), a detailed error code is stored into SD1502
and SD1503.
• SD1502: Error code that occurred in process control instruction
• SD1503: Processing number of corresponding instruction where error occurred
14
If "OPERATION ERROR (error code: 4100)" occurred in the process control instruction, confirm
its details in the above special registers.
Table 14.1 Error Codes That Occurred in Process Control Instructions (Stored in SD1502)
Error code
There is either a non-numeric or
1
non-normalized number.
Symbol error
2
(The number is negative)
Number error
3
(The number is outside the range)
4
Integer range is exceeded
5
Tried to divide by 0.
6
An overflow occurred.
Table 14.2 Processing Numbers of Instructions where Error Occurred (Stored in SD1503)
Processing
No.
1
Instruction
S. IN
Range
check
S. OUT1
Input
addition
processing
S. OUT2
14 - 1
Error definition
Set data, such as operation
constant, loop tag memory, loop
tag past value memory or
execution cycle, has a problem.
2
3
Input limiter
Engineering
value
reverse
conversion
Change
Reset
rate,
windup
upper/lower
limiter
Change
rate,
upper/lower
limiter
Cause
4
5
Digital
Filter
Output
conversion
Output
conversion
MELSEC-Q
Processing
Check/correct the set data.
6
7
8
14 - 1
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