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MELSEC-Q
3 SPECIFICATIONS
3.4.4 CH set value check codes (buffer memory addresses 11 to 18: Un\G11 to Un\G18)
(1) This area stores the result of checking whether a digital value that was set is
within or outside the valid range.
(2) When a digital value outside the valid range (see Table 3.7) is written, one of the
check codes listed in Table 3.8 is stored.
Table 3.8 Check code list
Check code
Description
000F
H
A digital value exceeding the valid range was written.
00F0
H
A digital value that falls short of the valid range was written.
00FF
H
A digital value that either falls short or exceeds the valid range was
written.
(3) Once a check code is stored, it will not be reset even if the digital value is within
the valid range.
(4) To reset the CH set value check code, set the error clear request (YF) to ON
after rewriting the digital value so that it is within the valid range.
(5) For Q62DA, Un\G13 to Un\G18 (CH3 to CH8) become invalid.
For Q64DA, Un\G15 to Un\G18 (CH5 to CH8) become invalid.
3.4.5 Error codes (buffer memory address 19: Un\G19)
(1) The error codes detected by the D/A conversion module are stored.
(2) See Section 7.1 for more details of the error codes.
