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7.13
Data Control Instructions
Upper and lower limit controls for BIN 16-bit data, upper and
lower limit controls for BIN 32-bit data
LIMIT(P), DLIMIT(P)
High
Basic
Process
performance
LIMIT, DLIMIT
LIMITP, DLIMITP
(S1): Lower limit value (minimum output threshold value) (BIN 16/32 bits)
(S2): Upper limit value (maximum output threshold value) (BIN 16/32 bits)
(S3): Input value to be controlled by the upper and lower limit control (BIN 16/32 bits)
(D): Head number of the devices where the output value controlled by the upper and lower limit control will be stored (BIN 16/32 bits)
Setting
Internal device
data
Bit
(S1)
(S2)
(S3)
(D)
Processing details
■LIMIT
• Controls the output value to be stored at the device designated by (D) by checking whether the input value (BIN 16 bits)
designated by (S3) is within the range of upper and lower limit values specified by (S1) and (S2) or not. Output value is
controlled in the way shown below:
Condition
Lower limit value (S1) > Input value (S3)
Upper limit value (S2) < Input value (S3)
Lower limit value (S1) Input value (S3) Upper limit value (S2)
Output value (
Value designated
by S1
• Values in the range from -32768 and 32767 can be designated at (S1), (S2), and (S3).
• When control based only on upper limit values is performed, the lower limit value designated at (S1) is set at "-32678".
• When control based only on lower limit values is performed, the upper limit value designated at (S2) is set at "32767".
7 APPLICATION INSTRUCTIONS
662
7.13 Data Control Instructions
LCPU
Redundant Universal
R, ZR
Word
D
)
Value designated by S2
Input value(
indicates an instruction symbol of LIMIT/DLIMIT.
Command
Command
P
J\
Bit
Word
Result
Lower limit value (S1) Output value (D)
Upper limit value (S2) Output value (D)
Input value (S3) Output value (D)
)
S3
S1
S2
S3
S1
S2
S3
U\G
Zn
Constant
K, H
D
D
Others
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