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● When changing device points, the following refresh ranges must not exceed the corresponding
device ranges.
• Refresh range of network module
• Auto refresh range of intelligent function module
If device points are set exceeding the corresponding device range, data may be written to any other device or an error
may occur.
● The total number of points for the internal relay, latch relay, annunciator, edge relay, link relay,
link special relay, step relay, timer, retentive timer, and counter must be set within the following
range.
• Serial number (first five digits) of the Universal model QCPU is "10041" or earlier: Up to 64K points
•
Serial number (first five digits) of the Universal model QCPU is "10042" or later: Not limited (Up to 29
words for internal user devices)
(3) Memory size
Set the internal user devices so that the following condition is satisfied.
(Bit device size) + (Timer, retentive timer, and counter sizes) + (Word device size) 29K words
(a) Bit device
For bit devices, 16 points are calculated as one word.
(b) Timer (T), retentive timer (ST), and counter (C)
For the timer (T), retentive timer (ST), and counter (C), 16 points are calculated as 18 words.
(c) Word device
For the data register (D), link register (W), and link special register (SW), 16 points are calculated as
16 words.
If the points for the internal user devices have been changed, the following files created with the
previous parameters can no longer be used.
• Sequence program files
• SFC program files
• ST program files
In such a case, read the above program files out from the CPU module to GX Developer, and then write them back again to
the CPU module.
16
(X+Y+M+L+B+F+SB+V+S)
(Bit device size) =
Words
16
(Timer, retentive timer, or counter size) =
(T+ST+C)
18 Words
16
(D+W+SW)
(Word device size) = 16 Words