Mitsubishi Electric MELSEC iQ-R C Series Programming Manual page 125

Precautions
When reading data from module labels, data is read from the module label (ulUnitLabel) and offset (ulOffset) for the size
specified in the size (ulSize). However, this function does not check whether the data is within the specified module label.
Therefore, data may be read from module labels other than the specified ones depending on the offset (ulOffset) and size
(ulSize). (For the offset (ulOffset) and size (ulSize) check, this function only checks whether the sum of module label
(ulUnitLabel), offset (ulOffset) and data size (ulSize) is exceeding the module label area size (for all modules).)
Return value
Return value Description
0 (0000H) Normal
Other than 0 Error
For details on the error, refer to the following:
Page 225 ERROR CODE LIST
Relevant function
• Page 154 CCPU_WriteMCUnitLabel
3 DETAILS OF FUNCTION
3.1 C Controller Module Dedicated Functions
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