Mitsubishi Electric MELSEC Q Series Programming Manual page 37

3 HANDLING OF CHARACTERS AND NUMERIC VALUES IN ST PROGRAMS
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Precaution for use of the pointer type, timer type, counter type and retentive
timer type labels
The pointer type, timer type, counter type or retentive timer type label can be
declared, but if it is used in an ST program as a label, a conversion error will
occur and the label cannot be used.
Precaution for use of the timer type, counter type and retentive timer type labels
If the timer type, counter type or retentive timer type label is defined in the
member variable of a structure, that member variable cannot be used on the ST
edit screen. However, the other member variables of a structure that include the
timer type, counter type and retentive timer type labels can be used.
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