11 PID CONTROL INSTRUCTION
11.1 PID Control Loop
763
11
Precautions
• When auto tuning is not used, twenty-five devices are occupied from the head device specified in (s3).
• When auto tuning (limit cycle method) is used, twenty-nine devices are occupied from the head device specified in (s3).
• When auto tuning (step response method) is used, the number of devices occupied from the devices specified in (s3)
differs depending on the ON/OFF status of b8 of (s3)+1.
• Two or more PID instructions can be executed at the same time. (There is no limitation in the number of loops.) However,
make sure that (s3), (d) and other operands specified in each instruction are different to each other.
• For the output value (MV) in the PID instruction, specify an unlatched data register. If specifying a latched data register,
make sure to clear the backup contents when the PLC mode is set to RUN using the following program.
Operation of b8
Occupied device points
ON
Twenty-eight devices are occupied from the device specified in (s3).
OFF
Twenty-five devices are occupied from the device specified in (s3).
(1): Latched data register number specified to (d)
SM402
Initial pulse
RST
D***
(1)
Summary of Contents for MELSEC iQ-F FX5
Page 1: ...MELSEC iQ F FX5 Programming Manual Instructions Standard Functions Function Blocks ...
Page 2: ......
Page 17: ...15 CONTENTS ...
Page 24: ...22 MEMO ...
Page 1050: ...1048 26 TIME DATA FUNCTIONS 26 4 Division MEMO ...
Page 1068: ...1066 29 COUNTER FUNCTION BLOCKS 29 4 Counter Function Block Operation error There is no error ...
Page 1107: ...I 1105 MEMO ...
Page 1111: ......