Mitsubishi Electric MELSEC-Q/L - Page 668

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7 APPLICATION INSTRUCTIONS
7.13 Data Control Instructions
■DBAND
• Controls the output value to be stored at the device designated by (D) by checking whether the input value (BIN 32 bits)
designated by ((S3), (S3)+1) is within the range of dead band upper and lower limit values specified by ((S1), (S1)+1) and
((S2), (S2)+1) or not. Output value is controlled in the way shown below:
• The values designated by ((S1), (S1)+1), ((S2), (S2)+1), or ((S3), (S3)+1) are within the range of from -2147483648 to
2147483647.
• The output value stored at (D), (D)+1 is a signed 32-bit BIN value. Therefore, if the operation results exceed the range of
from -2147483648 to 2147483647, the following will take place:
Ex.
When the dead band lower limit value ((S1), (S1)+1) is 1000 and the input value ((S3), (S3)+1) is -2147483648
-2147483648-1000 = 80000000H-000003E8H = 7FFFFC18H = 2147482648
Operation error
• In the following case, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.
Condition Result
Lower limit value ((S1)+1, (S1)) > Input value ((S3)+1, (S3)) Input value ((S3)+1, (S3)) - Lower limit value ((S1)+1, (S1))  Output value
((D)+1, (D))
Upper limit value ((S2)+1, (S2)) < Input value ((S3)+1, (S3)) Input value ((S3)+1, (S3)) - Upper limit value ((S2)+1, (S2))  Output value
((D)+1, (D))
Lower limit value ((S1)+1, (S1))  Input value ((S3)+1, (S3))  Upper limit
value ((S2)+1, (S2))
0  Output value ((D)+1, (D))
Error
code
Error details Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4100 The lower limit value specified in (S1) is greater than the upper limit value
specified in (S2).

0
D
Output value ( +1, )
D
S1
Dead band lower
limit value ( , +1)
S1
S3
Input value ( , +1)
S3
S2
Dead band upper
limit value ( , +1)
S2