How To Use Pid Instruction - Mitsubishi Electric FX5 User Manual
Melsec iq-f series
Hide thumbs
Also See for FX5:
- Programming manual (1112 pages) ,
- User manual (958 pages) ,
- Reference manual (44 pages)
Table of Contents
Advertisement
10.3
How to Use PID Instruction
This instruction executes PID control which changes the output value according to the input variation.
For details on the PID instruction, refer to the following manual.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function Blocks)
Ladder diagram
FBD/LD
EN
ENO
s1
d
s2
s3
Setting data
■Descriptions, ranges, and data types
Operand
Description
(s1)
Device number storing the target value (SV)
(s2)
Device number storing the measured value (PV)
(s3)
Device number storing PID parameters
(d)
Device number storing the output value (MV)
*1 When setting using a label, use the global label assigned to the device.
■Applicable devices
Operand
Bit
X, Y, M, L, SM,
F, B, SB, S
(s1)
(s2)
(s3)
(d)
*1 Only D, SD, R can be used.
Processing details
• Once the target value (s1), measured value (s2) and PID parameters (s3) to (s3)+6 are set and the program is executed,
the operation result (MV) is transferred to the output value (d) at every sampling time. The sampling time is specified by
(s3).
Command input
10 PID CONTROL FUNCTION
68
10.3 How to Use PID Instruction
(s1)
(s2)
(s3)
(d)
Word
T, ST, C, D, W,
U\G
SD, SW, R
*1
*1
*1
*1
PID
(s1)
(s2)
Structured text
ENO:=PID(EN,s1,s2,s3,d);
Range
-32768 to +32767
-32768 to +32767
1 to 32767
-32768 to +32767
Double word Indirect
Z
LC
LZ
(s3)
(d)
Output value (MV)
Parameters
Measured value (PV)
Target value (SV)
Data type
Data type (label)
16-bit signed binary
ANY16
16-bit signed binary
ANY16
16-bit signed binary
ANY16
16-bit signed binary
ANY16
Constant
specification
K, H
E
*1
*1
*1
*1
Others
$
Advertisement
Table of Contents
