Mitsubishi Electric MELSEC FX2N-2LC User manual

USER’S MANUAL
FX2N-2LC Temperature Control Block

Foreword
• This manual contains text, diagrams and explanations which will guide the reader in the cor-
rect installation and operation of the communication facilities of FX series.
• Before attempting to install or use the communication facilities of FX series this manual
should be read and understood.
• If in doubt at any stage of the installation of the communication facilities of FX series always
consult a professional electrical engineer who is qualified and trained to the local and
national standards which apply to the installation site.
• If in doubt about the operation or use of the communication facilities of FX series please
consult the nearest Mitsubisi Electric distributor.
• This manual is subject to change without notice.
FX2N-2LC Temperature Control Block

i
FX2N-2LC
Temperature Control Block
USER’S MANUAL
Manual number : JY992D85801
Manual revision : A
Date : January 2000
FX2N-2LC Tempereture Control Block

FX2N-2LC Tempereture Control Block
ii

FAX BACK
Mitsubishi has a world wide reputation for its efforts in continually developing and pushing
back the frontiers of industrial automation. What is sometimes overlooked by the user is the
care and attention to detail that is taken with the documentation. However,to continue this pro-
cess of improvement, the comments of the Mitsubishi users are always welcomed. This page
has been designed for you,the reader,to fill in your comments and fax them back to us. We
look forward to hearing from you.
Fax numbers: Your name....................................................
Mitsubishi Electric.... .....................................................................
America [phone]-2253 Your company ..............................................
Australia (02) 638 -7072 .....................................................................
Germany (0 21 02) 4 86-1 12 Your location:................................................
South Africa (0 27) 11 444-0223 .....................................................................
United Kingdom [phone]
Please tick the box of your choice
What condition did the manual arrive in? …Good …Minor damage …Unusable
Will you be using a folder to store the manual?…Yes …No
What do you think to the manual presentation?…Tidy …Un-friendly
Are the explanations understandable? …Yes …Not too bad …Unusable
Which explanation was most difficult to understand:..................................................................
....................................................................................................................................................
Are there any diagrams which are not clear? …Yes …No
If so,which:..................................................................................................................................
What do you think to the manual layout? …Good …Not too bad …Un-helpful
If there one thing you would like to see improved,what is it?......................................................
....................................................................................................................................................
....................................................................................................................................................
Could you find the information you required easily using the index and/or the contents,if possi-
ble please identify your experience:............................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
Do you have any comments in general about the Mitsubishi manuals?.....................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
Thank you for taking the time to fill out this questionnaire. We hope you found both the product
and this manual easy to use.
FX2N-2LC Tempereture Control Block
iii

FX2N-2LC Tempereture Control Block
iv

FX2N-2LC Tempereture Control Block
v
Guidelines for the Safety of the User and Protection of the Temperature control
block FX2N-2LC.
This manual provides information for the use of the Temperature control block FX2N-2LC. The
manual has been written to be used by trained and competent personnel. The definition of
such a person or persons is as follows;
a) Any engineer who is responsible for the planning, design and construction of automatic
equipment using the product associated with this manual should be of a competent
nature, trained and qualified to the local and national standards required to fulfill that
role. These engineers should be fully aware of all aspects of safety with regards to auto-
mated equipment.
b) Any commissioning or service engineer must be of a competent nature, trained and qual-
ified to the local and national standards required to fulfill that job. These engineers
should also be trained in the use and maintenance of the completed product. This
includes being completely familiar with all associated documentation for the said product.
All maintenance should be carried out in accordance with established safety practices.
c) All operators of the completed equipment should be trained to use that product in a safe
and coordinated manner in compliance to established safety practices. The operators
should also be familiar with documentation which is connected with the actual operation
of the completed equipment.
Note : Note: the term ‘completed equipment’ refers to a third party constructed device which
contains or uses the product associated with this manual.
Notes on the Symbols Used in this Manual
At various times through out this manual certain symbols will be used to highlight points of
information which are intended to ensure the users personal safety and protect the integrity of
equipment. Whenever any of the following symbols are encountered its associated note must
be read and understood. Each of the symbols used will now be listed with a brief description of
its meaning.
Hardware Warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property
damage.
3) Indicates a point of further interest or further explanation.
Software Warnings
4) Indicates special care must be taken when using this element of software.
5) Indicates a special point which the user of the associate software element should
be aware of.
6) Indicates a point of interest or further explanation.

FX2N-2LC Tempereture Control Block
vi
• Under no circumstances will Mitsubishi Electric be liable responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to understand-
ing the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for
actual use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

FX2N-2LC Temperature Control Block Contents
vii
1. Introduction ...........................................................................................1-1
1.1 Outline of product................................................................................................1-2
2. Product Configuration ...........................................................................2-1
2.1 Outside dimension...............................................................................................2-1
2.2 Name of each part...............................................................................................2-1
2.3 Status indication..................................................................................................2-2
2.4 Installation method ..............................................................................................2-3
2.5 Connection to PC Main Unit................................................................................2-4
3. Specifications........................................................................................3-1
3.1 Environmental specifications...............................................................................3-1
3.2 Power supply specifications ................................................................................3-1
3.3 Performance specifications .................................................................................3-2
3.4 Input specifications..............................................................................................3-3
3.5 Input range ..........................................................................................................3-4
3.6 Output specifications...........................................................................................3-5
4. Wiring....................................................................................................4-1
4.1 Wiring ..................................................................................................................4-2
5. Introduction of Functions.......................................................................5-1
5.1 PID control...........................................................................................................5-1
5.1.1 Easy PID control with two degrees of freedom..........................................................5-1
5.1.2 Overshoot prevention function...................................................................................5-2
5.2 Two-position control ............................................................................................5-3
5.3 Auto tuning function.............................................................................................5-4
5.3.1 AT (auto tuning).........................................................................................................5-4
5.3.2 AT bias ......................................................................................................................5-5
5.4 Auto / manual ......................................................................................................5-6
5.4.1 Auto mode and manual mode ...................................................................................5-6
5.4.2 Balance-less, bump-less function..............................................................................5-7
5.5 Heater disconnection detection function..............................................................5-8
5.6 Loop breaking alarm function (LBA)....................................................................5-9
6. Alarm.....................................................................................................6-1
7. Buffer Memory (BFM) ...........................................................................7-1
7.1 Buffer memory list................................................................................................7-1
7.2 Details of buffer memories...................................................................................7-4
7.2.1 BFM #0: Flag.............................................................................................................7-4
7.2.2 BFM #1 (CH1) and BFM #2 (CH2): Event.................................................................7-5
7.2.3 BFM #3 (CH1) and BFM #4 (CH2): Measured value (PV) ........................................7-7
7.2.4 BFM #5 (CH1) and BFM #6 (CH2): Control output value (MV) .................................7-7
7.2.5 BFM #7 (CH1) and BFM #8 (CH2): Heater current measured value.........................7-7
7.2.6 BFM #9: Default setting command............................................................................7-7
7.2.7 BFM #10: Error reset command................................................................................7-7
7.2.8 BFM #11: Control start/stop changeover...................................................................7-7
7.2.9 BFM #12 (CH1) and BFM #21 (CH2) : Set value (SV)..............................................7-8

FX2N-2LC Temperature Control Block Contents
viii
7.2.10 BFM #13 to BFM #16 (CH1) and BFM #22 to BFM #25 (CH2):
Alarm 1/2/3/4 set value..............................................................................................7-8
7.2.11 BFM #17 (CH1) and BFM #26 (CH2): Heater disconnection alarm set value...........7-8
7.2.12 BFM #18 (CH1) and BFM #27 (CH2) : Auto/manual mode changeover...................7-8
7.2.13 BFM #19 (CH1) and BFM #28 (CH2): Manual output set value................................7-9
7.2.14 BFM #20 (CH1) and BFM #29 (CH2): Auto tuning execution command...................7-9
7.2.15 BCM#30: Unit type code............................................................................................7-9
7.2.16 BFM #32 (CH1) and BFM #51 (CH2): Operation mode ............................................7-9
7.2.17 BFM #33 (CH1) and BFM #52 (CH2): Proportional band (P)....................................7-9
7.2.18 BFM #34 (CH1) and BFM #53 (CH2): Integral time (I)............................................7-10
7.2.19 BFM #35 (CH1) and BFM #54 (CH2): Derivative time (D) ......................................7-10
7.2.20 BFM #36 (CH1) and BFM #55 (CH2): Control response parameter .......................7-11
7.2.21 BFM #37 (CH1) and BFM #56 (CH2): Output limiter upper limit
BFM #38 (CH1) and BFM #57 (CH2): Output limiter lower limit..............................7-12
7.2.22 BFM #39 (CH1) and BFM #58 (CH2): Output change ratio limiter..........................7-13
7.2.23 BFM #40 (CH1) and BFM #59 (CH2): Sensor correction value setting (PV bias)...7-14
7.2.24 BFM #41 (CH1) and BFM #60 (CH2): Adjustment sensitivity (dead zone) setting..7-15
7.2.25 BFM #42 (CH1) and BFM #61 (CH2): Control output cycle setting.........................7-15
7.2.26 BFM #43 (CH1) and BFM #62 (CH2): Primary delay digital filter setting ................7-16
7.2.27 BFM #44 (CH1) and BFM #63 (CH2): Setting change ratio limiter..........................7-17
7.2.28 BFM #45 (CH1) and BFM #64 (CH2): AT (auto tuning) bias...................................7-18
7.2.29 BFM #46 (CH1) and BFM #65 (CH2): Normal/reverse operation selection ............7-18
7.2.30 BFM #47 (CH1) and BFM #66 (CH2): Setting limiter upper limit
BFM #48 (CH1) and BFM #67 (CH2): Setting limiter lower limit .............................7-19
7.2.31 BFM #49 (CH1) and BFM #68 (CH2): Loop breaking alarm judgement time..........7-20
7.2.32 In BFM #50, set the loop breaking alarm dead zone of CH1.
In BFM #69, set the loop breaking alarm dead zone of CH2...................................7-21
7.2.33 BFM #70 (CH1) and BFM #71 (CH2): Input type selection .....................................7-22
7.2.34 BFM #72 to BFM #75: Alarm mode setting .............................................................7-23
7.2.35 BFM #76: Alarm 1/2/3/4 dead zone setting.............................................................7-25
7.2.36 BFM #77: Number of times of alarm 1/2/3/4 delay..................................................7-26
7.2.37 BFM #78: Number of times of heater disconnection alarm delay............................7-26
7.2.38 BFM #79: Temperature rise completion range setting ............................................7-27
7.2.39 BFM #80: Temperature rise completion soak time..................................................7-27
7.2.40 BFM #81: CT monitor method changeover .............................................................7-28
7.2.41 BFM #82: Set value range error address ................................................................7-28
7.2.42 BFM #83: Set value backup command....................................................................7-29
8. Program Example .................................................................................8-1
8.1 Program example................................................................................................8-2
9. Diagnostic .............................................................................................9-1

FX2N-2LC Temperature Control Block Introduction 1
1Introduction 1
2 Product Configuration
3 Specifications
4 Wiring
5 Introduction of Functions
6Alarm
7 Buffer Memory (BFM)
8 Program Example
9 Diagnostic

FX2N-2LC Temperature Control Block Introduction 1

Introduction 1
1-1
1
1. Introduction
Cautions on design
• Install a safety circuit outside the PLC or the temperature control block FX2N-2LC so that
the entire system conservatively operates even if an abnormality occurs in the external
power supply or a failure occurs in the PLC or the FX2N-2LC.
If a safety circuit is installed inside the PLC, malfunction and erroneous output may
cause accidents.
1) Make sure to construct an emergency stop circuit, protection circuit or interlock circuit to
prevent damages of a machine, etc. outside the PLC or the FX2N-2LC.
2) If the PLC or the FX2N-2LC detects an abnormality such as a watch dog timer error or
input value error by the self-diagnosis function or when an abnormality occurs in the I/O
control area, etc. which cannot be detected by the CPU in the PLC, output control may
be disabled.
Design external circuits and structure so that the entire system conservatively operates
in such cases.
3) If a failure occurs in a relay, transistor, TRIAC, etc. in an output unit of the FX2N-2LC or
the PLC, outputs may keep ON or OFF.
For output signals which may lead to severe accidents, design external circuits and struc-
ture so that the entire system conservatively operates.
Cautions on installation
• Use the unit in the environment for the general specifications described in the manual.
Never use the unit in a place with dusts, soot, conductive dusts, corrosive gas or flamma-
ble gas, place exposed to high temperature, dew condensation or rain and wind or place
exposed to vibration or impact.
If the unit is used in such a place, electrical shock, fire, malfunction, damages in the unit
or deterioration of the unit may be caused.
• Never drop cutting chips or electric wire chips into the ventilation window of the FX2N-
2LC while drilling screw holes or wiring cables.
Such chips may cause fire, failure or malfunction.
• After finishing installation, remove a dust preventing sheet adhered on the ventilation
window of the PC and the FX2N-2LC.
If the sheet remains attached, fire, failure or malfunction may be caused.
• Securely connect cables such as extension cables and memory cassettes to specified
connectors.
Imperfect contact may cause malfunction.
Caution on disposal
• When disposing of the unit, treat it as industrial waste.
FX2N-2LC Temperature Control Block

FX2N-2LC Temperature Control Block Introduction 1
1-2
1.1 Outline of product
The temperature control block FX2N-2LC (hereafter referred to as "temperature control block"
or "FX2N-2LC") equipped with two temperature input points and two transistor (open collector)
output points is a special block to read temperature signals from thermocouples and platinum
resistance thermometer bulbs, and perform PID output control.
Connect the FX2N-2LC to the FX2N/2NC Series PC.
1) As input sensors, two thermocouples, two platinum resistance thermometer bulbs or one
thermocouple and one platinum resistance thermometer bulb are available.
2) Data can be written and read using FROM/TO instructions when the FX2N-2LC is connected
to the FX2N/2NC Series PC.
(The FX2N-2LC performs arithmetic operation for PID control and output control. You do not
have to create sequence programs for PID operation.)
3) Disconnection of heaters can be detected by current detection (CT).
4) The proportional band, the integral time and the derivative time can be easily set by auto
tuning.
5) Channels are isolated against each other.

FX2N-2LC Temperature Control Block Product Configuration 2
1 Introduction
2Product Configuration 2
3 Specifications
4 Wiring
5 Introduction of Functions
6Alarm
7 Buffer Memory (BFM)
8 Program Example
9 Diagnostic

FX2N-2LC Temperature Control Block Product Configuration 2

Product Configuration 2
2-1
2
2. Product Configuration
2.1 Outside dimension
2.2 Name of each part
Extension
cable
Mounting
hole
2-
φ
45
DIN rail
DIN rail
(width:
35 mm)
mounting
groove
Connector for next step
extension cable
4
OUT2
24V
OUT1
POWER
FX2N-2LC
24+
24- O
87
55
90
Status indicator LED
80 ±0.5
(mounting dimension)
Unit: mm
Mass: kg
Outer color: Munsell 0.08GY / 7.64 / 0.81
OUT2
24V
OUT1
POWER
FX2N-2LC
24+
24- O
➀
➁
➂
➃
➄➅
➂
➄
PTB
PTB
24+ COM
24- OUT1OUT2 CTCT FG
PTA
TC-
TC+ PTB
PTB
CTCT FG
PTA
TC-
TC+
CH1 CH2
Terminal block
①:PC connection cable
②:Screw mounting hole
③:Status indicator LED
④:DIN rail mounting groove (DIN rail width: 35 mm)
⑤:DIN rail mounting hook
⑥:Connector for next step extension cable
FX2N-2LC Temperature Control Block

FX2N-2LC Temperature Control Block Product Configuration 2
2-2
2.3 Status indication
Table 2.1:
LED name Indication Description
POWER Lit (green) 5 V power is supplied from PC main unit.
Extinguished 5 V power is not supplied from PC main unit.
24V Lit (red) 24 V power is supplied from outside.
Extinguished 24 V power is not supplied from outside.
OUT1 Lit (red) OUT1 output is ON.
Extinguished OUT1 output is OFF.
OUT2 Lit (red) OUT2 output is ON.
Extinguished OUT2 output is OFF.

FX2N-2LC Temperature Control Block Product Configuration 2
2-3
2
2.4 Installation method
The FX2N-2LC can be installed on the right side of an FX2N/2NC Series PLC basic unit, FX2N/
2NC Series extension unit or another extension block.
The FX2N-2LC can be attached with a DIN rail DIN46277 (width: 35 mm) or directly attached to
a panel surface with screws (M4).
• Installation on DIN rail
Align the upper side of the DIN rail mounting groove of the FX2N-2LC with a DIN rail
DIN46277 (width: 35 mm) (①), and push the FX2N-2LC on the DIN rail (②).
When removing the FX2N-2LC, pull out downward the DIN rail mounting hook (③), then
remove the FX2N-2LC (④).
• Direct installation on panel surface
Screw-tighten the FX2N-2LC with M4 screws to a panel surface using two (upper and lower)
mounting holes provided on the left side of the FX2N-2LC.
Assure the interval of 1 to 2 mm between a unit or block installed on the left side of the
FX2N-2LC.
Cautions on installation
• Use the unit in the environment for the general specifications described in the manual.
Never use the unit in a place with dusts, soot, conductive dusts, corrosive gas or flamma-
ble gas, place exposed to high temperature, dew condensation or rain and wind or place
exposed to vibration or impact.
If the unit is used in such a place, electrical shock, fire, malfunction, damages in the unit
or deterioration of the unit may be caused.
• Never drop cutting chips or electric wire chips into the ventilation window of the FX2N-
2LC while drilling screw holes or wiring cables.
Such chips may cause fire, failure or malfunction.
• After finishing installation, remove a dust preventing sheet adhered on the ventilation
window of the PC and the FX2N-2LC.
If the sheet remains attached, fire, failure or malfunction may be caused.
• Securely connect cables such as extension cables and memory cassettes to specified
connectors.
Imperfect contact may cause malfunction.
➁
➀
➃
➂
When attaching to DIN rail When removing from DIN rail

FX2N-2LC Temperature Control Block Product Configuration 2
2-4
2.5 Connection to PC Main Unit
Connect the FX2N-2LC to the PC main unit with an extension cable.
FX2N-2LC units are treated as special blocks of the PLC, and the special block No. 0 to 7 is
automatically assigned to each FX2N-2LC unit from the one nearest to the PLC basic unit.
(These unit Nos. are used in FROM/TO instructions.)
One FX2N-2LC unit occupies eight I/O points in the PC main unit.
For the details of I/O assignment in the PC, refer to the manual of the FX2N/2NC Series PC.
• Up to eight FX2N-2LC units can be connected to the FX2N Series PC. Up to four FX2N-2LC
units can be connected to the FX2NC Series PC.
• When connecting the FX2N-2LC unit to the FX2NC Series PC, the interface FX2NC-CNV-IF is
required.
(When connecting the FX2N-2LC unit to the FX2N Series PC, the interface FX2NC-CNV-IF is
not required.)
• For extension, an extension cable FX0N-65EC (650 mm) and the FX2NC-CNV-BC sold sepa-
rately are required.
Only one FX0N-65EC can be used per system.
FX 2N -32ER
FX
2N
-4AD FX
2N -2LC FX
2N -2LC
FX2N-32MR
(X000 to X017) FX2N-4AD
FX2N-2LC
FX2N-2LC
(Y000 to Y017) Special
block
No. 0
Special
block
No. 1
(Y020 to Y037)
72456130
1611 1514 1710 12 13
14 171510 12 13
72456130
1611
OUT
IN
LX13X15
X10 X14 X16
24+N
COM X4
X7
Y4
Y5
Y6
COM3
Y10
Y11
Y12
Y13Y1
Y2
Y3
Y14
Y15
X3
X2
X1
POWER
BATT.V
RUN
CPU.E
PROG.E
POWER
A/D
24V
X0
X5
72456130
72456130
OUT
IN
L X1X3X5X7
X6 X0 X2 X4 X6
24+N
COM X4
X7
COM4COM2
Y4
Y5
Y6
Y7 COM3
Y0
Y1
Y2
Y3COM1
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X3
X2
X1
POWER
01234567
76543210
POWER
OUT1
24V
OUT2
POWER
OUT1
24V
OUT2
FX 2N -32MR
FX2N-32MR
(X020 to X037)
Special
block
No.2
( ) indicates the I/O No. assignment in the PC main unit.