Mitsubishi Electric MELSEC-Q Series Programming Manual page 26

*1 For the timer, retentive timer, and counter, contact/coil values are stored in bit devices, and current values are stored in word devices.
*2 The number of points that can be actually used varies depending on the intelligent function module. For the points in the buffer memory,
refer to the manual for the intelligent function module used.
*3 The value can be changed in the Device setting of the PLC parameter dialog box. (Except for input, output, step relay, link special relay,
and link special register). Refer to the User's Manual (Function Explanation, Program Fundamentals) of the CPU module used.
*4 Character strings can be used only for the $MOV, STR, DSTR, VAL, DVAL, ESTR, and EVAL instructions. They cannot be used for the
other instructions.
*5 Because the Q00JCPU does not have the standard RAM, the file register cannot be used.
3 SPECIFICATIONS
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3.2 Device List