11 PROCESS CONTROL INSTRUCTIONS
11.7 Auto Tuning
1397
11
Processing details
This instruction performs auto tuning to make initial setting of PID constants.
■
Start signal determination processing
The instruction performs the following processing according to the auto tuning start signal (e1) and auto tuning completion
(BB16).
■
Loop stop processing
The following processing is performed according to the SPA status of the alarm detection (ALM).
■
Mode determination processing
The following processing is performed depending on the control mode (MODE) setting.
■
Input check processing
The following processing is performed according to the alarm detection (ALM).
■
Timeout determination processing
This function determines whether the auto tuning processing has reached the AT1 timeout time (AT1TOUT1).
e1
BB16
Processing
0
0
• BB alarms from BB1 to identification alarm BB8 are set to 0.
• When the step manipulated value set completion flag is 1, the following processing is performed.
MV=MV-AT1STEPMV
• The S.AT1 instruction is terminated.
1
0
• "Loop stop processing" is performed.
0
1
• BB auto tuning completion (BB16) is set to 0.
• The S.AT1 instruction is terminated.
1
1
• The S.AT1 instruction is terminated.
SPA status
Processing details
1
The loop stops. When the loop stops, the following operations are performed and the S.AT1 instruction ends.
• Auto tuning completion (BB16) is set to 1.
• When the step manipulated value set completion flag is 1, the following processing is performed.
MV=MV-AT1STEPMV
0
The loop runs, and "mode determination processing" is performed.
Control mode (MODE) setting
Processing details
AUT, CAB, CAS, CCB, CSV, LCA, LCC
The following processing is performed and the S.AT1 instruction is terminated.
• The control mode alarm (BB7) is set to 1.
• Auto tuning completion (BB16) is set to 1.
• When the step manipulated value set completion flag is 1, the following processing is
performed.
MV=MV-AT1STEPMV
MAN, CMB, CMV, LCM
"Input check processing" is performed.
Alarm Detection (ALM)
Processing details
PHA or HHA is 1.
The following processing is performed and the S.AT1 instruction is terminated.
• The input upper limit alarm (BB2) is set to 1.
• Auto tuning completion (BB16) is set to 1.
PLA or LLA is 1.
The following processing is performed and the S.AT1 instruction is terminated.
• The input upper limit alarm (BB3) is set to 1.
• Auto tuning completion (BB16) is set to 1.
Auto tuning processing
Processing details
If the AT1 timeout time (AT1TOUT1) is reached
The following processing is performed and the S.AT1 instruction is terminated.
• The input upper limit alarm (BB6) is set to 1.
• Auto tuning completion (BB16) is set to 1.
If the AT1 timeout time (AT1TOUT1) has not been reached
"Timeout (after maximum ramp) determination processing" is performed.
Summary of Contents for MELSEC iQ-R Series
Page 1: ...MELSEC iQ R Programming Manual Instructions Standard Functions Function Blocks ...
Page 2: ......
Page 24: ...22 INDEX 2092 INSTRUCTION INDEX 2093 REVISIONS 2104 WARRANTY 2105 TRADEMARKS 2106 ...
Page 34: ...32 MEMO ...
Page 35: ...33 PART 1 PART 1 OVERVIEW This part consists of the following chapter 1 OVERVIEW ...
Page 68: ...66 1 OVERVIEW 1 5 Precautions on Programming MEMO ...
Page 1448: ...1446 14 REDUNDANT SYSTEM INSTRUCTIONS 14 2 Disabling Enabling System Switching MEMO ...
Page 1972: ...1970 33 TIME DATA TYPE FUNCTIONS 33 4 Division MEMO ...
Page 2067: ...APPX Appendix 5 PID Control Program Examples 2065 A 252 Set PID control data for loop 2 ...
Page 2109: ......