Mitsubishi Electric MELSEC iQ-R Series Owner's manual

MELSEC iQ-R Programming Manual
(Process Control Function Blocks)

1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using MELSEC iQ-R series programmable controllers, please read the manuals for the product and the relevant
manuals introduced in those manuals carefully, and pay full attention to safety to handle the product correctly.
Make sure that the end users read this manual and then keep the manual in a safe place for future reference.
CONDITIONS OF USE FOR THE PRODUCT
(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major or serious accident;
and
ii) where the backup and fail-safe function are systematically or automatically provided outside of the PRODUCT for the
case of any problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of being used in general industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT LIMITED TO ANY AND ALL
RESPONSIBILITY OR LIABILITY BASED ON CONTRACT, WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY
INJURY OR DEATH TO PERSONS OR LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE
OPERATED OR USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS, OR
WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS, TECHNICAL
BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;
• Nuclear Power Plants and any other power plants operated by Power companies, and/or any other cases in which the
public could be affected if any problem or fault occurs in the PRODUCT.
• Railway companies or Public service purposes, and/or any other cases in which establishment of a special quality
assurance system is required by the Purchaser or End User.
• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as Elevator and Escalator,
Incineration and Fuel devices, Vehicles, Manned transportation, Equipment for Recreation and Amusement, and
Safety devices, handling of Nuclear or Hazardous Materials or Chemicals, Mining and Drilling, and/or other
applications where there is a significant risk of injury to the public or property.
Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the PRODUCT in one or
more of the Prohibited Applications, provided that the usage of the PRODUCT is limited only for the specific
applications agreed to by Mitsubishi and provided further that no special quality assurance or fail-safe, redundant or
other safety features which exceed the general specifications of the PRODUCTs are required. For details, please
contact the Mitsubishi representative in your region.

2
• When the SIL2 Process CPU is used
(1) Although MELCO has obtained the certification for Product's compliance to the international safety standards
IEC61508, IEC61511 from TUV Rheinland, this fact does not guarantee that Product will be free from any malfunction
or failure. The user of this Product shall comply with any and all applicable safety standard, regulation or law and take
appropriate safety measures for the system in which the Product is installed or used and shall take the second or third
safety measures other than the Product. MELCO is not liable for damages that could have been prevented by
compliance with any applicable safety standard, regulation or law.
(2) MELCO prohibits the use of Products with or in any application involving, and MELCO shall not be liable for a default, a
liability for defect warranty, a quality assurance, negligence or other tort and a product liability in these applications.
(a) power plants,
(b) trains, railway systems, airplanes, airline operations, other transportation systems,
(c) hospitals, medical care, dialysis and life support facilities or equipment,
(d) amusement equipments,
(e) incineration and fuel devices,
(f) handling of nuclear or hazardous materials or chemicals,
(g) mining and drilling,
(h) and other applications where the level of risk to human life, health or property are elevated.

3
INTRODUCTION
Thank you for purchasing the Mitsubishi Electric MELSEC iQ-R series programmable controllers.
This manual describes the procedures, details, and tag data of the process control function blocks.
Before using this product, please read this manual and the relevant manuals carefully and develop familiarity with the
functions and performance of the MELSEC iQ-R series programmable controller to handle the product correctly.
When applying the program examples provided in this manual to an actual system, ensure the applicability and confirm that it
will not cause system control problems.
Please make sure that the end users read this manual.
• For details on the function blocks and FBD/LD language, refer to the following.
MELSEC iQ-R Programming Manual (Program Design)
• For details on the faceplate, refer to the following.
GX Works3 Operating Manual
PX Developer Version 1 Operating Manual (Monitor Tool)

4
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
CONDITIONS OF USE FOR THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
MANUAL PAGE ORGANIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PART 1 OVERVIEW
CHAPTER 1 PROCESS CONTROL FUNCTION BLOCK 16
1.1 Process Control Function Block Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1.2 Program Supporting Process Control Function Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
1.3 Tag FB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Tag FB categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Initial values for tag data and operation constants (public variables) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Control modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
I/O modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.4 User-defined Tag FB and Tag Access FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Tag type list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
1.5 Program Execution Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Timer execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Interrupt execution (fixed scan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
When a safety program is used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CHAPTER 2 PROCEDURE BEFORE USING PROCESS CONTROL FUNCTION
BLOCK 30
2.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.2 Setting CPU Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
File Register Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Index Register Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Label Initial Value Reflection Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.3 Declaring a tag FB (Tag FB Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.4 Editing an FBD/LD Program for Process Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Creating a user-defined tag FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2.5 Setting Initial Values of FBs (FB Property) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.6 Converting and Writing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.7 Checking FB Operation (Faceplate). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2.8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
PART 2 LISTS OF PROCESS CONTROL FUNCTION
BLOCK
CHAPTER 3 LISTS OF PROCESS CONTROL FUNCTION BLOCK 44
3.1 General Process FBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.2 Tag Access FBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.3 Tag FBs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5
CONTENTS
PART 3 GENERAL PROCESS FB
CHAPTER 4 ANALOG VALUE SELECTION AND AVERAGE VALUE 60
4.1 High Selector (M+P_HS(_E)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.2 Low Selector (M+P_LS(_E)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
4.3 Middle Value Selection (M+P_MID(_E)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4.4 Average Value (M+P_AVE(_E)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.5 Absolute Value (M+P_ABS(_E)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
CHAPTER 5 CORRECTION OPERATION 70
5.1 Function Generator (M+P_FG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
5.2 Inverse Function Generator (M+P_IFG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
5.3 Standard Filter (moving average) (M+P_FLT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
5.4 Engineering Value Conversion (M+P_ENG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
5.5 Engineering Value Inverse Conversion (M+P_IENG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5.6 Temperature/Pressure Correction (M+P_TPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
5.7 Summation (M+P_SUM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
5.8 Summation (Internal Integer Integration) (M+P_SUM2_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
5.9 Range Conversion (M+P_RANGE_). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
CHAPTER 6 ARITHMETIC OPERATION 91
6.1 Addition (with coefficient) (M+P_ADD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
6.2 Subtraction (with coefficient) (M+P_SUB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
6.3 Multiplication (with coefficient) (M+P_MUL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
6.4 Division (with coefficient) (M+P_DIV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
6.5 Square Root (with coefficient) (M+P_SQR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
CHAPTER 7 COMPARISON OPERATION 101
7.1 Comparison (>) with setting value (M+P_GT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
7.2 Comparison (<) with setting value (M+P_LT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
7.3 Comparison (=) with setting value (M+P_EQ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
7.4 Comparison (>=) with setting value (M+P_GE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
7.5 Comparison (<=) with setting value (M+P_LE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
CHAPTER 8 CONTROL OPERATION 111
8.1 Lead-Lag (M+P_LLAG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
8.2 Integration (M+P_I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
8.3 Derivative (M+P_D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
8.4 Dead Time (M+P_DED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
8.5 High/Low Limiter (M+P_LIMT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
8.6 Variation Rate Limiter 1 (M+P_VLMT1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
8.7 Variation Rate Limiter 2 (M+P_VLMT2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
8.8 Dead Band (M+P_DBND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
8.9 Bump-less Transfer (M+P_BUMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
8.10 Analog Memory (M+P_AMR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
8.11 8 Points Time Proportional Output (M+P_DUTY_8PT_). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

6
PART 4 TAG ACCESS FB
CHAPTER 9 I/O CONTROL 144
9.1 Analog Input Processing (M+P_IN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
9.2 Output Processing-1 with Mode Switching (With Input Addition) (M+P_OUT1) . . . . . . . . . . . . . . . . . . . . 149
9.3 Output Processing-2 with Mode Switching (Without Input Addition) (M+P_OUT2) . . . . . . . . . . . . . . . . . 154
9.4 Output Processing-3 with Mode Switching (With Input Addition and Compensation)
(M+P_OUT3_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
9.5 Manual Output (M+P_MOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
9.6 Time Proportioning Output (M+P_DUTY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
9.7 Pulse Integrator (M+P_PSUM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
9.8 Batch Counter (M+P_BC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
9.9 Manual Setter (M+P_MSET_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
CHAPTER 10 LOOP CONTROL OPERATION 183
10.1 Ratio Control (Enable Tracking for primary loop) (M+P_R_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
10.2 Ratio Control (Disable Tracking for primary loop) (M+P_R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
10.3 Velocity Type PID Control (Enable Tracking for primary loop) (M+P_PID_T) . . . . . . . . . . . . . . . . . . . . . . 190
10.4 Velocity Type PID Control (Disable Tracking for primary loop) (M+P_PID) . . . . . . . . . . . . . . . . . . . . . . . . 196
10.5 2-degree-of-freedom PID Control (Enable Tracking for primary loop) (M+P_2PID_T) . . . . . . . . . . . . . . . 202
10.6 2-degree-of-freedom PID Control (Disable Tracking for primary loop) (M+P_2PID) . . . . . . . . . . . . . . . . . 208
10.7 2-degree-of-freedom Advanced PID Control (Enable Tracking for primary loop) (M+P_2PIDH_T_) . . . . 214
10.8 2-degree-of-freedom Advanced PID Control (Disable Tracking for primary loop) (M+P_2PIDH_). . . . . . 222
10.9 Position Type PID Control (Enable Tracking for primary loop/Disable Tracking from secondary loop)
(M+P_PIDP_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
10.10 Position Type PID Control (Disable Tracking for primary loop/Disable Tracking from secondary loop)
(M+P_PIDP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
10.11 Position Type PID Control (Enable Tracking for primary loop/Enable Tracking from secondary loop)
(M+P_PIDP_EX_T_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
10.12 Position Type PID Control (Disable Tracking for primary loop/Enable Tracking from secondary loop)
(M+P_PIDP_EX_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
10.13 Sample PI Control (Enable Tracking for primary loop) (M+P_SPI_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
10.14 Sample PI Control (Disable Tracking for primary loop) (M+P_SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
10.15 I-PD Control (Enable Tracking for primary loop) (M+P_IPD_T). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
10.16 I-PD Control (Disable Tracking for primary loop) (M+P_IPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
10.17 Blend PI Control (Enable Tracking for primary loop) (M+P_BPI_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
10.18 Blend PI Control (Disable Tracking for primary loop) (M+P_BPI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
10.19 High/Low Limit Alarm Check (M+P_PHPL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
10.20 2 position ON/OFF Control (Enable Tracking for primary loop) (M+P_ONF2_T). . . . . . . . . . . . . . . . . . . . 295
10.21 2 position ON/OFF Control (Disable Tracking for primary loop) (M+P_ONF2) . . . . . . . . . . . . . . . . . . . . . 298
10.22 3 position ON/OFF Control (Enable Tracking for primary loop) (M+P_ONF3_T). . . . . . . . . . . . . . . . . . . . 301
10.23 3 position ON/OFF Control (Disable Tracking for primary loop) (M+P_ONF3) . . . . . . . . . . . . . . . . . . . . . 305
10.24 Program Setter (M+P_PGS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
10.25 Multi-Point Program Setter (M+P_PGS2_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
10.26 Loop Selector (Disable Tracking for primary loop) (M+P_SEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
10.27 Loop Selector (Enable Tracking for primary loop only by CASIN_T) (M+P_SEL_T1) . . . . . . . . . . . . . . . . 326
10.28 Loop Selector (Enable Tracking for primary loop by CASIN_T1/_T2) (M+P_SEL_T2) . . . . . . . . . . . . . . . 330
10.29 Loop Selector (Enable Tracking from secondary loop to primary loop) (M+P_SEL_T3_) . . . . . . . . . . . . 334

7
CONTENTS
CHAPTER 11 TAG SPECIAL 338
11.1 Change Control Mode (M+P_MCHG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
PART 5 TAG FB
CHAPTER 12 LOOP TAG 342
12.1 Velocity Type PID Control (Enable Tracking for primary loop) (M+M_PID_T) . . . . . . . . . . . . . . . . . . . . . . 342
12.2 Velocity Type PID Control (Disable Tracking for primary loop) (M+M_PID). . . . . . . . . . . . . . . . . . . . . . . . 345
12.3 Velocity Type PID Control and DUTY Output (Enable Tracking for primary loop)
(M+M_PID_DUTY_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347
12.4 Velocity Type PID Control and DUTY Output (Disable Tracking for primary loop)
(M+M_PID_DUTY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
12.5 2-degree-of-freedom PID Control (Enable Tracking for primary loop) (M+M_2PID_T) . . . . . . . . . . . . . . . 351
12.6 2-degree-of-freedom PID Control (Disable Tracking for primary loop) (M+M_2PID). . . . . . . . . . . . . . . . . 354
12.7 2-degree-of-freedom PID Control and DUTY O/P (Enable Tracking for primary loop)
(M+M_2PID_DUTY_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
12.8 2-degree-of-freedom PID Control and DUTY O/P (Disable Tracking for primary loop)
(M+M_2PID_DUTY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
12.9 2-degree-of-freedom Advanced PID Control (Enable Tracking for primary loop) (M+M_2PIDH_T_). . . . 360
12.10 2-degree-of-freedom Advanced PID Control (Disable Tracking for primary loop) (M+M_2PIDH_) . . . . . 365
12.11 Position Type PID Control (Enable Tracking for primary loop/Disable Tracking from secondary loop)
(M+M_PIDP_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
12.12 Position Type PID Control (Disable Tracking for primary loop/Disable Tracking from secondary loop)
(M+M_PIDP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373
12.13 Position Type PID Control (Enable Tracking for primary loop/Enable Tracking from secondary loop)
(M+M_PIDP_EX_T_). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
12.14 Position Type PID Control (Disable Tracking for primary loop/Enable Tracking from secondary loop)
(M+M_PIDP_EX_). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
12.15 Sample PI Control (Enable Tracking for primary loop) (M+M_SPI_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380
12.16 Sample PI Control (Disable Tracking for primary loop) (M+M_SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383
12.17 I-PD Control (Enable Tracking for primary loop) (M+M_IPD_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385
12.18 I-PD Control (Disable Tracking for primary loop) (M+M_IPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
12.19 Blend PI Control (Enable Tracking for primary loop) (M+M_BPI_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390
12.20 Blend PI Control (Disable Tracking for primary loop) (M+M_BPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393
12.21 Ratio Control (Enable Tracking for primary loop) (M+M_R_T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396
12.22 Ratio Control (Disable Tracking for primary loop) (M+M_R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398
12.23 2 position ON/OFF Control (Enable Tracking for primary loop) (M+M_ONF2_T) . . . . . . . . . . . . . . . . . . . 400
12.24 2 position ON/OFF Control (Disable Tracking for primary loop) (M+M_ONF2) . . . . . . . . . . . . . . . . . . . . . 402
12.25 3 position ON/OFF Control (Enable Tracking for primary loop) (M+M_ONF3_T) . . . . . . . . . . . . . . . . . . . 404
12.26 3 position ON/OFF Control (Disable Tracking for primary loop) (M+M_ONF3) . . . . . . . . . . . . . . . . . . . . . 406
12.27 Monitor (M+M_MONI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
12.28 Manual Output with Monitor (M+M_MWM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410
12.29 Batch Preparation (M+M_BC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
12.30 Pulse Integrator (M+M_PSUM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414
12.31 Loop Selector (Disable Tracking for primary loop) (M+M_SEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416
12.32 Loop Selector (Enable Tracking for primary loop only by CASIN_T) (M+M_SEL_T1) . . . . . . . . . . . . . . . 418
12.33 Loop Selector (Enable Tracking for primary loop by CASIN_T1/_T2) (M+M_SEL_T2) . . . . . . . . . . . . . . . 420
12.34 Loop Selector (Enable Tracking from secondary loop to primary loop) (M+M_SEL_T3_) . . . . . . . . . . . . 422
12.35 Manual Output (M+M_MOUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424

8
12.36 Program Setter (M+M_PGS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426
12.37 Multi-Point Program Setter (M+M_PGS2_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428
12.38 Manual Setter with Monitor (M+M_SWM_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 432
12.39 Position Proportional Output (M+M_PVAL_T_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434
12.40 Heating and Cooling Output (M+M_HTCL_T_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442
CHAPTER 13 STATUS TAG 452
13.1 Motor Irreversible (2 Input/2 Output) (M+M_NREV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452
13.2 Motor Reversible (2 Input/3 Output) (M+M_REV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456
13.3 ON/OFF Operation (2 Input/2 Output) (M+M_MVAL1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
13.4 ON/OFF Operation (2 Input/3 Output) (M+M_MVAL2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464
13.5 Timer 1 (Timer stops when COMPLETE flag is ON) (M+M_TIMER1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468
13.6 Timer 2 (Timer continues when COMPLETE flag is ON) (M+M_TIMER2) . . . . . . . . . . . . . . . . . . . . . . . . . . 470
13.7 Counter 1 (Counter stops when COMPLETE flag is ON) (M+M_COUNTER1) . . . . . . . . . . . . . . . . . . . . . . 472
13.8 Counter 2 (Counter continues when COMPLETE flag is ON) (M+M_COUNTER2) . . . . . . . . . . . . . . . . . . 475
13.9 Push Button Operation (5 Input/5 Output) (M+M_PB_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478
CHAPTER 14 ALARM TAG 482
14.1 Alarm (M+M_ALARM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 482
14.2 64 Points Alarm (M+M_ALARM_64PT_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484
CHAPTER 15 MESSAGE TAG 486
15.1 Message (M+M_MESSAGE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486
15.2 64 Points Message (M+M_MESSAGE_64PT_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 488
APPENDICES 490
Appendix 1 Tag Data List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490
PID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491
2PID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496
2PIDH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
PIDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
SPI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511
IPD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515
BPI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 519
R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523
ONF2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527
ONF3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 530
MONI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 533
SWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535
MWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 538
BC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 541
PSUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543
SEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544
MOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546
PGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547
PGS2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550
PVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553
HTCL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 557
NREV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 560
REV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561

9
CONTENTS
MVAL1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 562
MVAL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 563
TIMER1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 564
TIMER2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565
COUNT1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 566
COUNT2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 567
PB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 568
ALM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 569
ALM_64PT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570
MSG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 577
MSG_64PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 578
Correspondence table of tag types and tag access FBs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585
Correspondence table of tag types and tag FBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 586
Correspondence table of tag types and alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587
Correspondence table of tag types and control modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 588
Correspondence table of tag types and I/O modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 589
Appendix 2 Approximate Number of Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590
List of number of steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590
Increasing number of steps by the process control extension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 593
Appendix 3 Related Functions of Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 594
Auto tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 594
Various controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 601
I/O mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606
Stop alarm processing in loop control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612
How to use the output open alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 614
Program setter setting method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615
Tight shut/full open function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617
Appendix 4 Program Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 618
Control mode switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 618
Writing MV or SV with the host computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620
Single solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 621
Double solenoid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 622
INDEX 623
INSTRUCTION INDEX 624
REVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .626
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .627
TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .628

10
RELEVANT MANUALS
e-Manual refers to the Mitsubishi Electric FA electronic book manuals that can be browsed using a dedicated
tool.
e-Manual has the following features:
• Required information can be cross-searched in multiple manuals.
• Other manuals can be accessed from the links in the manual.
• The hardware specifications of each part can be found from the product figures.
• Pages that users often browse can be bookmarked.
• Sample programs can be copied to an engineering tool.
Manual name [manual number] Description Available form
MELSEC iQ-R Programming Manual (Process Control Function Blocks)
[SH-081749ENG] (this manual)
Standard process function blocks, tag access function blocks,
and tag function blocks designed for the process control
e-Manual
PDF
MELSEC iQ-R Programming Manual (Instructions, Standard Functions/
Function Blocks)
[SH-081266ENG]
Instructions for the CPU module, dedicated instructions for the
intelligent function modules, and standard functions/function
blocks
e-Manual
PDF
MELSEC iQ-R Programming Manual (Program Design)
[SH-081265ENG]
Program specifications (ladder, ST, FBD/LD, and SFC
programs)
e-Manual
PDF
GX Works3 Operating Manual
[SH-081215ENG]
System configuration, parameter settings, and online
operations of GX Works3
e-Manual
PDF
PX Developer Version 1 Operating Manual (Monitor Tool)
[SH-080370E]
PX Developer monitoring tool and the monitoring and
controlling of the DDC processing using the tag FB
Print book
PDF

11
TERMS
Unless otherwise specified, this manual uses the following terms.
Term Description
Assignment information data The assignment information of the tag data assigned to the file register. The device information of the CPU module is
stored.
CPU module The abbreviation for the MELSEC iQ-R series CPU module
Engineering tool The product name of the software package for the MELSEC programmable controllers
Faceplate Gauge window on which an indicator such as a controller is displayed in image format Monitoring the tag data and
changing the current value can be performed.
FB property The VAR_PUBLIC or VAR_PUBLIC_RETAIN class label among the local labels defined in FB. For the tag FB, the tag
data member is included in the tag FB member.
Setting the initial value for the FB property or changing the current value during a program execution changes the
function block operation.
FBD/LD The abbreviation for the function block diagram/ladder diagram
FBD/LD program for process control An FBD/LD program with the extended function for the process control
Label A label that represents a device in a given character string
Process control extension Extending the functions of the engineering tool for the instrumentation engineering
Process control function block In the engineering tool project of the Process CPU and the SIL2 Process CPU, the function block supplied by the
manufacturer that can be used in the FBD/LD program with the process control extension enabled.
The process control instruction corresponding to the Process CPU and the SIL2 Process CPU is executed in the
function block.
Process CPU A generic term for the R08PCPU, R16PCPU, R32PCPU, and R120PCPU
SIL2 Process CPU A generic term for the R08PSFCPU, R16PSFCPU, R32PSFCPU, and R120PSFCPU.
This module is used with a SIL2 function module as a pair, and performs both standard control and safety control. This
module is also used with a redundant function module as a pair and configures a redundant system.
Tag access FB The process control function block that can be used only in the user-defined tag FB.
Accessing the tag data of the user-defined tag FB executes the processing.
Tag data The data where the process conditions and process status data associated with the tag FB are arranged. The
engineering tool creates the tag data as a structure.
Tag FB A function block with the process control function which works as a controller or an indicator.
The tag data defined as the global label is used.
Tag type Classification of the process control function which works as a controller or an indicator. The tag type determines the
structure type of the tag data and the faceplate type.
User-defined tag FB The function block that can customize the process control processing of the manufacturer-defined tag FB.
The tag data can be referred from the FB program created by combining the function, function block, and process
control function block.

12
MANUAL PAGE ORGANIZATION
In this manual, pages are organized and the symbols are used as shown below.
How to read chapters 4 to 15
The following illustration is for explanation purpose only, and should not be referred to as an actual documentation.
9.1 Analog Input Processing (M+P_IN)
M+P_IN
This FB performs range check, input limiter, engineering value inverse conversion, and digital filter processing.
The input limiter processing can be enabled or disabled on the "Options" window of the engineering tool.
*1 Transition to CASDR is possible.
Block diagram
FBD/LD
Applicable tag type
PID, 2PID, 2PIDH, PIDP, SPI, IPD, BPI, R, ONF2, ONF3, MONI, SWM, MWM, PVAL
Control mode
MAN AUT CAS*1 CMV CSV
¨¨¨¨¨
PVN PVP
M+P_IN
M+P_IN
PVP
PVN
SIMIN
(%)
SEA (*)
ALM
NOR,
OVR
SIM
Tag data
(PV Input)
(Simulation input)
Disable alarm detection
Input
limiter
Inverse
engineering
value conversion
Digital
filter
Range
check
Setting data
Input/output variable
Public variable (operation constant)
Variable
name
Description Recommended
range
Type Data type
LAERelbairavtupnIXAMNotNIMNeludomamorftupnINVP
LAERelbairavtuptuO]%[001ot0tuptuoVPPVP
Variable
name
Description Recommended
range
Initial value Set by Data type
LAERresU0.001999999ot999999-timiLhgiHtupnIXAMN
LAERresU0.0999999ot999999-timiLwoLtupnINIMN
Processing details
Range check
This function block checks the range of an input value.
(1)
(2)
(3)
(4)
t
Input value
Sensor error
occur Sensor error occur
deraelcrorrerosneSteserrorrerosneS
High limit range error (HH)
Low limit range error reset (L_)
Low limit range error (LL)
High limit range error reset (H_)
Sensor error cleared
Operation error
Error code
(SD0)
Description
3400H An invalid operation (such as division by zero) is performed.
3402H Input data (PVN), block memory, operation constant (NMAX, NMIN, HH, H_, L_, LL) or tag data is a subnormal number or NaN (not a
number).
3403H An overflow has occurred.
3405H High limit range error occurrence (HH) < high limit range error return (H_), low limit range error return (L_) < low limit range error
occurrence (LL), or input high limit (NMAX) < input low limit (NMIN)
Ò
Ô
Ó
Õ
Ö
×
Ø
Ù

13
Function block symbol
• A function block followed by parentheses indicates multiple function blocks. For example, "M+P_HS(_E)" includes two
function blocks: M+P_HS and M+P_HS_E.
Description formats of the FBD/LD language
Corresponding tag type (For tag access FB and tag FB)
Corresponding control mode (For tag access FB and tag FB)
Function block diagram
Input/output variables and public variables
Functions
Error code and error details

14
MEMO

15
PART 1
PART 1 OVERVIEW
This part consists of the following chapters.
1 PROCESS CONTROL FUNCTION BLOCK
2 PROCEDURE BEFORE USING PROCESS CONTROL FUNCTION BLOCK

16 1 PROCESS CONTROL FUNCTION BLOCK
1.1 Process Control Function Block Types
1PROCESS CONTROL FUNCTION BLOCK
A process control function block is a function block whose function is extended for process control. It contains structure data
including process conditions and process status (tag data).
A process control function block can be used with the Process CPU and SIL2 Process CPU (standard program only) for
MELSEC iQ-R series.
Ex.
Program using the tag FB (M+M_2PIDH_) which optimizes responsive performance for a setting value and control
performance to a disturbance
1.1 Process Control Function Block Types
The process control function block has following types.
(1) Tag FB of multi-point program setter (M+M_PGS2_)
(2) Tag FB of two-degree-of-freedom advanced PID control (M+M_2PIDH_)
(3) General process FB of 8 points time proportional output (M+P_DUTY_8PT_)
Item Description
General process FB Performs process control operation, such as correction operation and control operation.
Tag access FB Performs processing by accessing tag data of a user-defined tag FB.
It can be used only in the user-defined tag FB.
Tag FB Performs process control operation as a controller or an indicator. It performs processing by accessing tag data defined as
global labels.
The execution status can be checked and controlled on the faceplate of the engineering tool.
User-defined tag FB Combines tag access FBs, standard functions, or standard function blocks to extend process control processing of a tag
FB.
It performs processing by accessing tag data in the same way as a tag FB. The execution status can be checked and
controlled on the faceplate of the engineering tool.
(1) (2) (3)

1 PROCESS CONTROL FUNCTION BLOCK
1.2 Program Supporting Process Control Function Blocks 17
1
1.2 Program Supporting Process Control Function
Blocks
A process control function block can be used in an FBD/LD program for process control.
A FBD/LD program for process control can be created when the process control extension is enabled on the "Properties"
window of the program file.
The scan execution type or fixed scan execution type can be specified as an execution type of the FBD/LD program for
process control. For the scan execution type, only one program file with process control extension enabled can be created.
The following table shows the availability of process control function blocks.
*1 The tag access FB can be used only in the user-defined tag FB.
*2 The tag FB and the user-defined tag FB can be declared only as a global label. Declare them in the "Tag FB Setting" window of the
engineering tool. (Page 33 Declaring a tag FB (Tag FB Setting))
*3 Actions and transitions in an SFC program are included.
*4 Do not use a process control function block or a user-defined FB uses a user-defined tag FB in programs with the process control
extension disabled. Doing so causes an error in programs.
Item Called function block
Local label Global label
General
process
FB
Tag access
FB
Tag FB,
user-
defined tag
FB
General
process
FB
Tag access
FB
Tag FB,
user-
defined tag
FB
Calling
source
Program FBD/LD (process function
extension enabled)

*2
FBD/LD (process function
extension disabled)

Other than FBD/LD*3 
Function
block
FBD/LD (user-defined tag FB) 
*1  *2
FBD/LD (other than user-defined
tag FB)*4

*2
Other than FBD/LD*3 
Function 

18 1 PROCESS CONTROL FUNCTION BLOCK
1.3 Tag FB
1.3 Tag FB
A Tag FB and a user-defined tag FB perform process control operation as a controller or an indicator. They perform
processing by accessing tag data defined as global labels.
The tag data defines data relevant to the instrumentation system as a structure. The execution status can be checked and
controlled by accessing the tag data from the faceplate of the engineering tool.
(1) The tag FB performs processing by accessing the tag data or operation constants (public variables of the FB).
(2) The execution status of the tag FB can be checked and controlled on the faceplate of the engineering tool.
PVN MVN
CASIN CASOUT
M+M_PID
CASOUT_T
(1)
(2)
Device/label memory
Operation variable
Tag data
Tag FB
Input Output
Engineering tool