Mitsubishi Electric L02SCPU User's Manual And Reference page 144

(d) Specifying a device by index modification
If an index-modified device name is specified to register the executional conditioned device test setting, the
CPU module does not check whether the specified device is within the setting range. To change a device by
specifying a step No., the index-modified device must be within the device range or not be on the boundary of
devices, otherwise the device value is not changed.
(e) Specifying a device by indirect specification
If an indirectly-specified device name is specified to register the executional conditioned device test setting, the
CPU module does not check whether the specified device is within the setting range. To change a device by
specifying a step No., the index-modified device must not be on the boundary of devices, otherwise the device
value is not changed.
(f) Specifying the file register
If the file register is specified to register the executional conditioned device test setting, the CPU module does
not check the file register file assignment and the file register number range. A file register value is not changed
within the specified step in the following cases.
• The file register file is not assigned.
• The specified file register number is out of the file register range.
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