Hitachi NJI-350B User Manual
HITACHI PROGRAMMABLE CONTROLLER
APPLICATION MANUAL
NJI-350B (X)
WARNING
To ensure that the equipment described by this manual. As well as all equipment connected to and used
with it, operate satisfactorily and safely, all applicable local and national codes that apply to installing and
operating the equipment must be followed. Since codes can vary geographically and can change with
time, it is the user’s responsibility to determine which standard and codes apply, and to comply with
them.
FAILURE TO COMPLY WITH APPLICABLE CODES AND STANDARDS CAN RESULT IN
DAMAGE TO EQUIPMENT AND / OR SERIOUS INJURY TO PERSONNEL.
INSTALL EMERGENCY POWER STOP SWITCH WHICH OPERATES INDEPENDENTLY OF
THE PROGRAMMABLE CONTROLLER TO PROTECT THE EQUIPMENT AND / OR
PERSONNEL IN CASE OF THE CONTROLLER MALFUNCTION.
Personnel who are to install and operate the equipment should carefully study this manual and any
others referred to by it prior to installation and / or operation of the equipment. Hitachi, Ltd. constantly
strives to improve its products, and the equipment and the manual(s) that describe it may be different
from those already in your possession.
If you have any questions regarding the installation and operation of the equipment, or if more
information is desired, contact your local Authorized Distributor or Hitachi, Ltd.
IMPORTANT
THIS EQUIPMENT GENERATES, USES, AND CAN RADIATE RADIO FREQUENCY ENERGY AND, IF
NOT INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL, MAY CAUSE
INTERFERENCE TO RADIO COMMUNICATIONS. AS TEMPORARILY PERMITTED BY REGULATION,
IT HAS NOT BEEN TESTED FOR COMPLIANCE WITH THE LIMITS FOR CLASS A COMPUTING
DEVICES PURSUANT TO SUBPART J OF PART 15 OF FCC RULES, WHICH ARE DESIGNED TO
PROVIDE REASONABLE PROTECTION AGAINST SUCH INTERFERENCE.
OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE INTERFERENCE
IN WHICH CASE THE USER, AT HIS OWN EXPENSE, WILL BE REQUIRED TO TAKE WHATEVER
MEASURES MAY BE REQUIRED TO CORRECT THE INTERFERENCE.
LIMITED WARRANTY AND IMITATION OF LIABILITY
Hitachi, Ltd. (Hitachi) warrants to the original purchaser that the programmable controller (PLC)
manufactured by Hitachi is free from defects in material and workmanship under normal use and
service. The obligation of Hitachi under this warranty shall be limited to the repair or exchange of any
part or parts which may prove defective under normal use and service within eighteen (18) months from
the date of manufacture or twelve (12) months from the date of installation by the original purchaser
which ever occurs first, such defect to be disclosed to the satisfaction of Hitachi after examination by
Hitachi of the allegedly defective part or parts. This warranty in expressly in lieu of all other warranties
expressed or implied including the warranties of merchantability and fitness for use and of all other
obligations or liabilities and Hitachi neither assumes, nor authorizes any other person to assume for
Hitachi, any other liability in connection with the sale of this PLC. This warranty shall not apply to this
PLC or any part hereof which has been subject to accident, negligence, alteration, abuse, or misuse.
Hitachi makes no warranty whatsoever in respect to accessories or parts not supplied by Hitachi. The
term "original purchaser", as used in this warranty, shall be deemed to mean that person for whom the
PLC in originally installed.
In no event, whether as a result of breach of contract, warranty, tort (including negligence) or otherwise,
shall Hitachi or its suppliers be liable for any special, consequential, incidental or penal damages
Including, but not limited to, loss of profit or revenues, loss of use of the products or any associated
equipment, damage to associated equipment, cost of capital, cost of substitute products, facilities,
services or replacement power, down time costs, or claims of original purchaser’s customers for such
damages.
To obtain warranty service, return the product to your distributor, or send it with a description of the
problem, proof of purchase, post paid, insured, and in a suitable package to:
Quality Assurance Dep.
Hitachi Industrial Equipment Systems Co., Ltd.
46-1, Ooaza-Tomioka Nakajo-machi
Kitakanbara-gun, Niigata-ken
959-2608 JAPAN
Copyright 2000 by Hitachi Industrial Equipment Systems Co., Ltd.
All Rights reserved - Printed in Japan
The information and/or drawings set forth in this document and all rights in and to inventions disclosed herein and
patents which might be granted thereon disclosing or employing and the materials, techniques or apparatus described
herein are the exclusive property of Hitachi, Ltd.
No copies of the information or drawings shall be made without the prior consent of Hitachi, Ltd.
Hitachi, Ltd. provides customer assistance in varied technical areas. Since Hitachi does not posses full access to data
concerning all of the uses and applications of customer‘s products, responsibility is assumed by Hitachi neither for
customer product design nor for any infringements of patents or rights of others which may result from Hitachi
assistance.
The specifications and descriptions contained in this manual were accurate at the time they were approved for printing.
Since Hitachi, Ltd. Incorporated constantly strives to improve all its products, we reserve the right to make changes to
equipment and/or manuals at any time without notice and without incurring any obligation other than as noted in this
manual.
Hitachi, Ltd. assumes no responsibility for errors that may appear in this manual.
As the product works with user program and Hitachi, Ltd. cannot test all combination of user program components, it is
assumed that a bug or bugs may happen unintentionally. If it is happened: please inform the fact to Hitachi, Ltd. or its
representative. Hitachi will try to find the reason as much as possible and inform the countermeasure when obtained.
Nevertheless Hitachi, Ltd. intends to make products with enough reliability, the product has possibility to be damaged at
any time. Therefore personnel who are to install and operate the equipment has to prepare with the counter-measure such
as power off switch can be operated independently of the controller. Otherwise, it can result in damage to equipment
and/or serious injury to personnel.
Safety Precautions
Read this manual and attached documents thoroughly before installing and operating this unit, and performing
maintenance or inspection of this unit in order to use the unit correctly. Be sure to use this unit after acquiring adequate
knowledge of the unit, all safety information, and all precautionary information. Also, be sure to deliver this manual to
the person in charge of maintenance.
Safety caution items are classified as “Danger” and “Caution” in this document.
DANGER
CAUTION
However, depending on the situation, items marked with may result in major accidents.
Both of these items contain important safety information, so be sure to follow them closely.
Icons for prohibited items and required items are shown below:
: Indicates a prohibited item (item that cannot be performed). For example, when open flames are prohibited,
is shown.
: Indicates a required item (item that must be performed). For example, when grounding must be performed,
is shown.
: Cases in which, if handled incorrectly, a dangerous situation may occur, resulting in
possible death or severe injury.
: Cases in which, if handled incorrectly, a dangerous situation may occur, resulting in
possible minor to medium injury to the body, or only mechanical failure.
CAUTION
1. Installation
CAUTION
• Use this product in an environment as described in the catalogue and this document.
If this product is used in an environment subject to high temperature, high humidity, excessive dust, corrosive
gases, vibration or shock, it may result in an electric shock, fire or malfunction.
• Installation this product according to the instructions in this manual.
If installation is not performed correctly, it may result in falling, malfunction, or an operational error of the unit.
• Never allow foreign objects such as wire chips to enter the unit.
They may cause a fire, malfunction, or failure.
2. Wiring
REQUIRED
• Always perform grounding (FE terminal).
If grounding is not performed, there is a risk of an electric shock or malfunction.
CAUTION
• Connect a power supply that meets the rating.
If a power supply that does not meet the rating is connected, it may result in a fire.
• Any wiring operation should only be performed by a qualified technician.
If wiring is performed incorrectly, it may result in a fire, failure, or electric shock.
3. Precautions When Using the Unit
DANGER
• Never touch the terminals while the power is on.
There is a risk of an electric shock.
• Configure the emergency stop circuit, interlock circuit and other related circuits external to the programmable
controller (referred to as the PLC in this document).
Otherwise, a failure in the PLC may damage the equipment or result in a serious accident.
Never interlock the unit with the external load via the relay drive power supply of the relay output module.
CAUTION
• Before performing program change, forced output, run, stop and other operations while the unit is in operation, be
sure to check the validity of the applicable operation and safety.
An operation error may damage the equipment or result in a serious accident.
• Be sure to power on the unit according to the designated power-on sequence.
Otherwise, an erroneous operation may damage the equipment or result in a serious accident.
4. Maintenance
DANGER
• Never connect the
short circuit the battery.
There is a risk of an explosion or fire.
and of the battery in reverse. Also, never charge, disassemble, heat, place in fire, or
PROHIBITED
• Never disassemble or modify the unit.
These actions may result in a fire, malfunction, or failure.
CAUTION
• Be sure to turn off the power supply before removing or attaching the module/unit.
Otherwise, it may result in an electric shock, malfunction, or failure.
Revision History
No. Description of Revision Date of Revision Manual Number
1 Appendix-1 Instruction Support
FUN92 to 96 of H-4010
{ -> ×.
2000/11 NJI-350 (X)
Appendix-2 Task code H28
Corrected explanation of Timer counter number.
2 Postscript of battery error detection. (3.2 chapters item
2000/12 NJI-350A (X)
number 26, 15 chapters (4) )
Correct a description of digital filter . (8.7 chapters)
Addition of appendix 3.
3 28 points expansion units added.
2003/10 NJI-350B (X)
Analog expansion module added.
Circuit diagram added in chapter 3
FUN 5, TRNS/RECV command added in chapter 5.
Table of Contents
Chapter 1 Features ..................................................................................................................................... 1-1 to 1-2
Chapter 2 System Overview....................................................................................................................... 2-1 to 2-2
Chapter 3 Function and Performance Specifications ...............................................................................3-1 to 3-14
3.1 General Specifications ............................................................................................................. 3-1
3.2 Function Specifications............................................................................................................ 3-2
3.3 Performance Specifications...................................................................................................... 3-6
3.3.1 Calculation Specifications ............................................................................................ 3-6
3.3.2 Input Specifications ...................................................................................................... 3-7
3.3.3 Output Specifications.................................................................................................... 3-8
3.3.4 High-Speed Counter Specifications............................................................................ 3-12
3.3.5 PWM Output/Pulse Train Output Specifications........................................................ 3-12
3.3.6 Analogue Input Specifications.................................................................................... 3-12
3.3.7 Analogue Output Specifications ................................................................................. 3-13
3.3.8 Potentiometer Analogue Input Specifications............................................................. 3-14
3.3.9 Interrupt Input Specifications ..................................................................................... 3-14
3.3.10 Backup ........................................................................................................................ 3-14
3.3.11 Expansion ................................................................................................................... 3-14
3.3.12 Clock Function............................................................................................................3-15
3.3.13 Power Supply for Sensor ............................................................................................ 3-16
Chapter 4 Product lineup and wiring .......................................................................................................4-1 to 4-18
4.1 Product lineup.......................................................................................................................... 4-1
4.2 10-Point Basic Unit.................................................................................................................. 4-3
4.3 14-Point Basic Unit.................................................................................................................. 4-4
4.4 23-Point and 28-Point Basic Unit ............................................................................................ 4-5
4.5 Expansion Unit......................................................................................................................... 4-6
4.6 Terminal Layout and Wiring.................................................................................................... 4-7
4.7 Weights and Power Consumption .......................................................................................... 4-16
4.8 Exterior Dimensions .............................................................................................................. 4-17
Chapter 5 Instruction Specifications...................................................................................................... 5-1 to 5-146
5.1 Instruction Classifications ........................................................................................................ 5-1
5.2 List of Instructions................................................................................................................... 5-2
5.3 Instruction Specification Details............................................................................................5-13
Chapter 6 I/O Specifications...................................................................................................................... 6-1 to 6-6
6.1 I/O Assignment ........................................................................................................................ 6-2
6.2 External I/O Numbers.............................................................................................................. 6-3
6.3 Internal Output Numbers.......................................................................................................... 6-6
Chapter 7 Programming............................................................................................................................. 7-1 to 7-8
7.1 Memory Size and Memory Assignment ................................................................................... 7-1
7.2 Programming Devices .............................................................................................................. 7-2
7.3 Programming Methods............................................................................................................. 7-3
7.4 Program Transfer ..................................................................................................................... 7-7
Chapter 8 High speed counter, PWM/Pulse train output and Analogue I/O............................................ 8-1 to 8-22
8.1 Input/Output Function.............................................................................................................. 8-1
8.1.1 Initial Setting for Input/Output Function ...................................................................... 8-1
8.1.2 Operation Mode............................................................................................................ 8-2
8.1.3 Input/Output Setting .................................................................................................... 8-3
8.1.4 Input/Output Setting (Mode 10) ................................................................................... 8-4
8.1.5 Special Output Operation in CPU STOP Status ........................................................... 8-5
8.1.6 Pulse / PWM Output adjustment................................................................................... 8-5
8.2 High-Speed Counter (Single-Phase) ........................................................................................ 8-6
8.2.1 Operation of Single-Phase Counter............................................................................... 8-6
8.2.2 Setting of Single-Phase Counter ................................................................................... 8-8
8.3 High-Speed Counter (Two-Phase Counter)............................................................................ 8-10
8.3.1 Operation of the Two-Phase Counters........................................................................ 8-10
8.3.2 Setting of Two-Phase Counter.................................................................................... 8-13
8.4 PWM Output.......................................................................................................................... 8-15
8.4.1 Operation of PWM Output ......................................................................................... 8-15
8.4.2 Setting of PWM Output .............................................................................................. 8-16
8.5 Pulse Train Output ................................................................................................................. 8-18
8.5.1 Operation of Pulse Output .......................................................................................... 8-18
8.5.2 Setting of Pulse Output ............................................................................................... 8-19
8.6 Interrupt Input........................................................................................................................ 8-21
8.7 Digital Filter........................................................................................................................... 8-21
8.8 Potentiometers........................................................................................................................ 8-22
8.9 Analogue Input....................................................................................................................... 8-23
8.10 Analogue Output.................................................................................................................... 8-23
8.11 Analogue Expansion unit ....................................................................................................... 8-24
Chapter 9 PLC Operation ........................................................................................................................9-1 to 9-12
9.1 RUN Start ................................................................................................................................ 9-2
9.1.1 Normal Scan ................................................................................................................. 9-3
9.1.2 Periodical Scan ............................................................................................................. 9-5
9.1.3 Interrupt scan ................................................................................................................ 9-6
9.1.4 Relationship of Each Scan Type ................................................................................... 9-8
9.2 Online Change in RUN ............................................................................................................ 9-9
9.3 Instantaneous Power Failure ..................................................................................................9-10
9.4 Operation Parameter .............................................................................................................. 9-11
9.5 Test Operation........................................................................................................................ 9-12
9.6 Forced Set/Reset .................................................................................................................... 9-12
9.7 Forced Output ........................................................................................................................ 9-12
Chapter 10 PLC Installation, Mounting, Wiring......................................................................................10-1 to 10-8
10.1 Installation ............................................................................................................................. 10-1
10.2 Wiring .................................................................................................................................... 10-3
Chapter 11 Communication Specifications............................................................................................11-1 to 11-10
11.1 Port function .......................................................................................................................... 11-1
11.2 Port 1...................................................................................................................................... 11-1
11.3 Port 2...................................................................................................................................... 11-3
11.4 General purpose port (Port 1,2) ............................................................................................. 11-4
11.5 Modem Control Function....................................................................................................... 11-5
11.5.1 Configuration.............................................................................................................. 11-5
11.5.2 AT Commands............................................................................................................ 11-5
11.6 Connecting to the Ports .......................................................................................................... 11-8
11.6.1 Port 1 .......................................................................................................................... 11-8
11.6.2 Port 2 .......................................................................................................................... 11-9
Chapter 12 Error Code List and Special Internal Outputs .....................................................................12-1 to 12-14
12.1 Error Codes ............................................................................................................................ 12-1
12.2 Syntax and Assembler Error Codes........................................................................................ 12-3
12.3 Operation Error Codes ........................................................................................................... 12-4
12.4 Bit Special Internal Output Area............................................................................................ 12-5
12.5 Word Special Internal Output Area........................................................................................ 12-9
Chapter 13 Troubleshooting ..................................................................................................................13-1 to 13-16
13.1 Error Display and Actions...................................................................................................... 13-1
13.2 Checklist when Abnormality Occurred .................................................................................. 13-5
13.3 Procedures to Solve Abnormality .......................................................................................... 13-6
Chapter 14 Operation Examples............................................................................................................ 14-1 to 14-16
Chapter 15 Daily and Periodic Inspections.............................................................................................. 15-1 to 15-2
Appendix 1 H-Series Instruction Support Comparison Chart.................................................................................A-1
Appendix 2 Standards...........................................................................................................................................A-11
MEMO
Chapter 1 Features
1. Multifunctional all-in-one type PLC
The MICRO-EH is a multifunctional all-in-one type PLC that contains all necessary parts—a power supply and
CPU parts as well as I/O units--within one unit.
Three sizes of PLCs are available: 10, 14, and 28 points. A type with 23 points plus three points of analog I/O
having the same size as the 28-point PLC is also available. Moreover, for PLCs with more than 14 points, it is
possible to install additional 14 or 28 point expansion units up to four units. Thus, the MICRO-EH can control a
wide range of systems from small to medium size.
2. Simplified positioning by counter inputs and pulse train outputs
The function of inputs/outputs can be selected from four modes. By selecting a mode, inputs/outputs that are used as
normal inputs/outputs can be set as counter inputs and pulse train outputs. Through a combination of these special
inputs/outputs, it is possible to control positioning without using special modules.
3. Simplified instrument system by analog integration
For the 23-point PLC, there are two points of analog input and one point of analog output for which both current
and voltage can be selected. High performance analog channels, with a resolution of 12 bits and an overall accuracy
of ±1 % or less, can be used without requiring special settings of the channels; thus, a simplified instrument system
can easily be implemented.
4. Superior upward compatibility
The MICRO-EH has been developed as a part of the EH/H series family.
Debugging and programming can be performed using the same concept as for the EH/H series.
In addition, the MICRO-EH software property can effectively be applied to the EH/H series for future system
expansion.
Chapter 1 Features
5. Easy maintenance through removable terminal blocks and installation on a DIN rail
All models of the MICRO-EH series support the DIN rail so that the PLC can easily be mounted and dismounted. In
addition, the I/O section of the 14-point PLC or more utilizes a removable terminal block. Thus, erroneous and
faulty wiring that may occur when connecting to external devices can be reduced.
6. Remote maintenance through modem connection
Communication with remote sites can be performed via dial-up line by connecting a modem to port 1 on the 14point PLC or more of the MICRO-EH series. It is possible to monitor and manage remote systems from an office or
monitor room.
7. Easily adjustable potentiometer
The 14-point PLC or more of the MICRO-EH series supports two potentiometers.
By using these potentiometers, it is possible to rewrite internal output values in real-time by one driver without using
peripheral devices. Since the resolution of the potentiometer is 10 bits, it is possible to set any value from 0 to 3FFH.
To obtain stable analog values of the potentiometers, it is possible to sample 1 to 40 analog values of the
potentiometers and average them.
8. Maintaining programs without a battery
It is possible to retain user programs in case of out-of battery or no battery, since FLASH memory is used as the
backup memory for the user programs. However, a battery is necessary for data memory backup. (See the Notes in
Chapter 7.1 for a list of precautionary details.)
9. Support for various programming languages
The MICRO-EH supports “Pro-H,” the programming software that allows creating programs in five programming
languages regulated in IEC1131-3. This means that customers who have learned languages other than Ladder can
easily create programs with this programming software.
10. Compliant with overseas specifications as standard
All types of MICRO-EH PLCs have obtained the CE mark, C-TICK and UL. Therefore, systems in which these
PLCs are installed can be exported without requiring any modification.
1-1
MEMO
Chapter 1 Features
1-2
Chapter 2 System Overview
This chapter describes the system configuration of the MICRO-EH.
The MICRO-EH is an all-in-one type programmable controller, and has the following system configuration.
1] Basic unit
Figure 2.1 10-point type system configuration diagram
Chapter 2 System Overview
1] Basic unit
2] Expansion unit2] Expansion unit2] Expansion unit2] Expansion unit
3] Expansion cable3] Expansion cable3] Expansion cable3] Expansion cable
Figure 2.2 14-point type system configuration diagram
2-1
[1] Basic unit
Chapter 2 System Overview
[2] Expansion unit
[3] Expansion cable
[2] Expansion unit [2] Expansion unit
[3] Expansion cable [3] Expansion cable
[3] Expansion cable
[2] Expansion unit
Figure 2.3 23,28-point type system configuration diagram
No restriction for combination of 14,23,28 points, and basic/expansion unit.
14 points basic unit can handle any type of expansion units, and 23/28 points basic unit as well.
No. Device name Description
1] Basic unit Calculates, imports inputs, and controls outputs according to the contents of user programs.
2] Expansion unit 14 points digital unit, 4 in/2 out analog unit
3] Expansion cable Cable for connecting the basic unit and expansion unit, or between expansion units.
2-2
Chapter 3 Function and Performance Specifications
Chapter 3 Function and Performance
Specifications
3.1 General Specifications
Item Specification
Power supply type AC DC
Power voltage 100/110/120 V AC (50/60 Hz),
200/220/240 V AC (50/60 Hz)
Power voltage fluctuation
range
Current consumption Please refer to 4.7, “Weights and Power Consumption.”
Allowable momentary power
failure
Operating ambient temp.
Storage ambient temp.
Operating ambient humidity 5 to 95 % RH (no condensation)
Storage ambient humidity 5 to 95 % RH (no condensation)
Vibration proof Conforms to JIS C 0911
Noise resistance
Supported standards Conforms with UL, CE markings and C-TICK
Insulation resistance
Dielectric withstand voltage 1,500 V AC for one minute between the AC external terminal and the protection earth (PE)
Grounding Class D dedicated grounding (grounded by a power supply module)
Environment used No corrosive gases and no excessive dirt
Structure Attached on an open wall
Cooling Natural air cooling
85 to 100 V AC: For a momentary power
100 to 264 V AC: For a momentary power
{ Noise voltage 1,500 Vpp Noise pulse width 100 ns, 1 µs
{ Based on NEMA ICS 3-304
{ Static noise: 3,000 V at metal exposed area
{ Conforms with EN50081-2 and EN50082-2
20 MΩ or more between the AC external terminal and the protection earth (PE) terminal (based
85 to 264 V AC wide range 19.2 to 30 V DC
19.2 to 30 V DC: For a momentary power
failure of less than 10 ms,
operation continues
failure of less than 20 ms,
operation continues
0 to 55 °C
-10 to 75 °C
(Noise created by the noise simulator is applied across the power supply module's input
terminals. This is determined by our measuring method.)
on 500 V DC mega)
terminal
24 V DC
failure of less than 10 ms,
operation continues
3-1
Chapter 3 Function and Performance Specifications
3.2 Function Specifications
The functions available in the MICRO-EH are described in the table below.
No. Item Description
1 Basic functions The following functions can be executed when constructing a system using the PLC.
1] An input signal is received from the control object, operations are performed according to
the contents of the program created by the user and the results are output as an output signal.
Also, operation results and progress information can be retained in the internal output area.
2] Power is supplied to the main module, system starts to run, and the operation described
above is performed continuously until the power is shut down or the system stops running.
3] The information retained internally can be extracted by a device connected externally or can
be set in other information. Also, this information is initialized at the time the system starts
running, but it can also be retained depending on the user settings.
4] Operating status can be confirmed with the LED display of each unit or with an external
device that has been connected.
2 Setting and display The following have been provided for the user to set or confirm various types of operation
status:
1] DIP switch (basic unit)
This specifies the CPU communication function setting and operation mode, etc. (except for
10-point type)
2] RUN switch (basic unit)
It can instruct to run and stop. (external input for 10-point type)
3] LED display (basic unit and expansion unit)
Indicates the power system status, operating status and I/O operation status.
4] Communication connector (basic unit)
This can connect external devices using RS-232C, RS-485, RS-422. (only the 23-point and
28-point types with RS-485, RS-422)
5] Expansion connector (basic unit and expansion unit)
This allows installation of additional input/output. (except for 10-point type)
6] Terminal block (basic unit and expansion unit)
This performs the connections for supplying power, and for handling signals with the
control object.
3 Number of I/O points The number of points that can be controlled with respect to the control object is as follows:
1] External inputs/outputs
The number of points that can be use for external inputs/outputs differs depending on the
basic unit. The 10-point type cannot expand the inputs/outputs. For the 14-point, 23-point
and 28-point types, a maximum of 4 expansion units can be connected. The I/O numbers for
inputs are indicated by X, WX, DX and outputs are indicated by Y, WY, DY.
2] Internal outputs
These are areas for temporarily storing information. The I/O numbers include M, WM, DM,
R, WR, DR.
3] A timer counter is provided internally.
4] Array (corresponding to a substitution statement only)
An array of I/O numbers can be expressed by enclosing by parentheses.
4 User program
memory
The program in which the control contents have been described can be stored. This FLASH
memory resides in the basic unit.
1] The contents of this memory will be maintained even if the power is shut off. Because of
this, it is necessary to initialize the memory since it may have undefined after the unit is
purchased.
2] Programming is done using peripheral units such as programming software (LADDER
EDITOR) for the H-series programmable controllers.
3] The instructions that can be used are those designated by the H-series ladder. See the list of
instructions for details.
4] A battery is not required to retain the contents of the user program. Always save the created
programs to a floppy disk just in case an unexpected problem occurs.
3-2
Chapter 3 Function and Performance Specifications
No. Item Description
5 Control method With the PLC, the user programs are converted in batch at operation startup, and the programs
after conversion will be executed in order as they are read one by one.
1] The method used for data I/O is that after the I/O data (information) is scanned (execution
from the head of the program to the end), it is updated in group. If refresh of external I/O is
required during scanning (refresh method), use the refresh instruction.
2] Apart from the program that will be normally executed, a periodic scan program which
interrupts the normal program at a fixed time intervals and is executed, can be created. The
time intervals are 10 ms, 20 ms and 40 ms.
3] The user programs are executed from the head of the program to the end, and are once again
repeated after performing the system processing that updates the lapsed timer value,
refreshes I/O, and performs communication with peripheral units.
6 Run/stop control Running and stopping the PLC is normally performed by the user.
1] Turn on the RUN switch to start operation for the 14-point type or higher. Turn this switch
off to stop operation.
For the 10-point type, turn on the RUN input terminal to start operation. Turn it off to stop
operation.
2] The start and stop operations can be performed with designated external inputs or internal
outputs by designating the operation control inputs with a programming unit.
3] Apart from the operation described above, if a malfunction is detected in the system while it
is running, operation stops and the outputs are aborted (OFF).
4] If the power is shut off and then turned back on while the system is running, operation starts.
When the power shuts off, turn off the power to the PLC, then shut off the external input
power. When turning the power back on, turn on the external input power before turning on
the power to the PLC.
5] When starting operation, do so after clearing internal information which is not designated
for storage during power failure. When stopping operation, leave the internal information as
is, turn off the outputs and then stop the operation.
6] When the power has been cut off for longer than the time allowed for the momentary power
failure, then depending on the system load status, either operation continues or the system
perceives that a power shut off has occurred and restarts operation. To resume operation
securely, have the power remain off for 1 minute or longer.
7 Operation parameters Each type of condition for operating the PLC can be set. The possible settings for operation
when an error occurs are provided below.
1] Operation may be continued when I/O information does not match.
2] Overload check time can be set. The initial value is 100 ms and the module stops when the
time for one scan takes longer than the set overload check time. (overload error)
3] Operation may be continued when an overload error occurs.
4] When a power failure (power shutoff) occurs, the internal output area for retaining
information and the timer counter range can be designated.
And, the setting below is possible.
1] The name of the user program can be registered.
2] A password can be set up so that the third party cannot reference the program.
3] It is necessary to register the type of I/O module used as an I/O assignment table. In order to
create this I/O assignment table, the types of I/O modules that are connected can be read.
8 Change while in
operation
A part of a program can be modified during operation.
1] If a modification is made with a programming unit and a change is performed while in
operation, the user program in the CPU is changed and the altered program is switched
internally at the end of scanning, and operation continues with the new program.
2] When a control instruction is included in the modification to the program, make the changes
after first performing the control instruction change procedure in the programming unit to
check for safety.
3] Until operation starts to continue with the new program, a pause [halt period] occurs when
the module does not run. External input information is not being received during this time,
so leave a sufficient time for executing a change while in operation.
3-3
Chapter 3 Function and Performance Specifications
No. Item Description
9 Forced set/reset Forced set and forced reset of the designated I/O can be performed from the programming unit
connected to the CPU module.
10 Forced output Output can be forced with respect to the designated I/O number from the programming unit
connected to the CPU module. For I/O that is not designated, outputs are shut off.
11 Calendar clock
function
(only for 23- and 28point types)
12 Dedicated port This is a communication port with dedicated protocol for the H-series. The communication
13 General purpose port General purpose port function is supported from software version H0130 (WRF051=H0130) or
14 Modem control A modem can be used to connect externally. It becomes operable when data receives from the
15 Self-diagnosis Self-diagnostic tests for the following items are performed:
16 Abnormal handling When a problem occurs, the error code that indicates the error description is output to special
17 Task code By combining individual task codes, the following functions can be achieved by the programs in
18 Instruction Programming can be performed for various purposes and usage by combining Ladder and the
19 High-speed counter The external input of the basic unit can be used as a high-speed counter by specifying it as a
23-point and 28-point types have the calendar clock function.
1] The year, month, date, day of the week, hour, minute and second can be set.
2] There is a function for making adjustments in 30-second units.
3] When a battery is not installed, the calendar clock information is not retained when power
goes off. The calendar clock must be reset. (The battery is an optional. Purchase separately.)
command called the task code is defined in the port.
1] A programming unit can be connected. (However, the command language programmer
PGM-CHH and the portable graph programmer PGM-GPH cannot be used.)
2] Port 1 and port 2 can be used as dedicated ports. Transmission speed, etc. can be switched
using the DIP switch. (Port 2 is supported only by the 23-point and 28-point type models.)
newer. This function enables serial communication to any standard devices like bar code reader
by using TRNS/RECV command in user program.
external media, and task code communication can afterward be performed.
Port 1 can be assigned for this function by switching the DIP switch. (The 10-point type is not
supported.)
1] Microcomputer check
2] System program area check
3] Memory check
4] User program check
5] Internal output area check
6] Mounted I/O check
internal output WRF000 as a hexadecimal value. Also, errors are notified to the external devices
through the OK LED. If the error level is high, the CPU stops operation, but depending on the
error, the operation may be continued using the user settings.
If multiple errors occur, the error code with higher error severity is set. The detailed information
is also set to the special internal output. Also, this information is always recorded in the power
failure memory, so the information can be referenced even after the power is cut off. (However,
a battery is required.) The clearing of the error information can be conducted by turning on
R7EC.
the host computer:
1] CPU control (RUN/STOP control of CPU, occupy/release, CPU status read, etc.)
2] I/O control (various types of monitoring)
3] Memory write (all clear, batch transfer, etc.)
4] Memory read (reading of programs, etc.)
5] Response (various responses from CPU)
instruction language.
counter input. The following can be set.
1] Single-phase counter, 2 channels
2] Single-phase counter, 4 channels (For the 10-point type, it is single-phase, 3 channels.)
3] Two-phase counter 1 channel, single-phase counter 1 channel (For the 10-point type, it is
two-phase, 1 channel.)
The functions include a count operation (up/down, leading/trailing), coincidence output control,
preset by preloaded input, and count value reading by strobe input.
3-4
Chapter 3 Function and Performance Specifications
No. Item Description
20 Interrupt input The external input of the basic unit can be specified for interrupt input. With the interrupt input,
the corresponding interrupt program can be executed.
21 PWM output The external output of the basic unit can be specified for pulse width modulated output. In this
case, pulses are output at the specified frequency with a duty between 0 and 100 %. A maximum
of 4 points, including the pulse array output, can be set.
22 Pulse train output The external output of the basic unit can be specified for pulse output. In this case, pulses are
output at the specified frequency with a duty between 30 and 70 %. A maximum of four points,
including the pulse output, can be set.
23 Analogue input The analogue input function is available in the 23-point type and analog exp. unit. The
resolution is 12 bits and it can be used by either selecting a current input between 0 and 20 mA
or a voltage input between 0 and 10 V.
24 Analogue output The analogue output function is available in the 23-point type and analog exp. unit. The
resolution is 12 bits and it can be used by either selecting a current output between 0 and 20 mA
or a voltage output between 0 and 10 V.
25 Potentiometer 14-point, 23-point, and 28-point types have two potentiometers, with which setting values etc.
can be changed without using the programming units.
26 Battery A dedicated battery can be installed in the 23-point and 28-point types so that data in the data
memory can be maintained even when the power supply to the main unit is shut off. In addition,
the data of the calendar clock in the 23-point and 28-poins types can be maintained. The battery
is an optional (model EH-MBAT).
Please refer to Chapter 15 (4) Life of the battery.
Note: There are functions supported by H series that are not supported by this PLC (debug, trace, force, and simulation functions).
3-5
Chapter 3 Function and Performance Specifications
3.3 Performance Specifications
3.3.1 Calculation Specifications
The calculation specifications of the PLC are described below.
Model Name 10-point type 14-point type 23/28-point type
Control
specifications
Operation
processing
specifications
Type
CPU
Processing system
Processing
speed
User program memory
Instruction
language
Ladder Basic instructions
Basic instructions
Application instructions
Basic instructions
Arithmetic instructions
Application instructions
EH-D10DT
EH-D10DTP
EH-D10DR
39 types such as LD, LDI, AND, ANI, OR, ORI, ANB, ORB, OUT, MPS,
62 types (arithmetic, application, control, FUN command etc.)
EH-D14DT
EH-D14DTP
EH-A14DR
EH-D14DR
EH-A14AS
32-bit RISC processor
Stored program cyclic system
0.9 µs / instruction
Several 10 µs / instruction
3 k steps max. (FLASH memory)
MRD, MPP, etc.
39 types, such as
EH-A23DRP
EH-A23DRT
EH-D23DRP
EH-D28DT
EH-D28DTP
EH-A28DRP
EH-A28DRT
EH-A28DR
EH-D28DRP
EH-D28DRT
EH-D28DR
EH-A28AS
Arithmetic instructions
Application instructions
I/O
processing
specifications
Peripheral
equipment
Maintenance
functions
*1: The same numbers cannot be used with the timer counter.
*2: Only timers numbered 0 to 63 can use 0.01 s for their timer base.
External
I/O
Internal
output
Timer
counter
Edge detection
Program system
Peripheral unit
Self-diagnosis
I/O processing system
Maximum number of
points
Bit
Word
Special
Bit/word shared
Number of points
Timer set value
Counter set value
Bit
Word
10 points 126 points 135 points 140 points
0 to 65,535, timer base 0.01 s, 0.1 s, 1 s (0.01s has maximum 64 points *2)
Instruction language programmer and form graphic display programmer cannot
PLC error (LED display): Microcomputer error, watchdog timer error, memory
error, program error, system ROM/RAM error, scan time monitoring, battery
voltage low detection, etc.
62 types (arithmetic, application, control, FUN command etc.)
Refresh processing
1,984 points (R0 to R7BF)
4,096 words (WR0 to WRFFF)
64 points (R7C0 to R7FF)
512 words (WRF000 to WRF1FF)
16,384 points, 1,024 words (M0 to M3FFF, WM0 to WM3FF)
256 points (TD + CU) *1
1 to 65,535 times
512 points (DIF0 to DIF511: Decimal)
+ 512 points (DFN0 to DFN511: Decimal)
Instruction language, ladder diagram
Programming software
(LADDER EDITOR DOS version/Windows® version, Pro-H)
be used.
3-6
Chapter 3 Function and Performance Specifications
3.3.2 Input Specifications
The input circuit consists of DC input and AC input, with the following specifications.
(1) DC input
Item Specification Circuit diagram
Input voltage 24 V DC
Allowable input voltage range 0 to 30 V DC
Input impedance
Input current 7.5 mA typical
ON voltage 15 V DC (min) / 4.5 mA (max)Operating
voltage
Input lag
OFF voltage 5 V DC (max) / 1.5 mA (max)
OFF → ON
ON → OFF
Basic unit : 0.5 to 20 ms (configurable)
Exp. unit : 0.5 ms or less
Basic unit : 0.5 to 20 ms (configurable)
Exp. unit : 0.5 ms or less
Number of input points
Number of common
Polarity None
Insulation system Photocoupler insulation
Input display LED (green)
External connection 10-point type: fixed type terminal block
14-, 23-, 28-point types: Removable type
*1: Common terminals are separated each other.
Approx. 2.8 kΩ
See Chapter 4
See Chapter 4
screw terminal block (M3)
0
Internal circuit
1
C
(2) AC input
Item Specification Circuit diagram
Input voltage 100 to 120 V AC
Allowable input voltage range 85 to 132 V AC
50 -5 % to 60 +5 % Hz
Input impedance
Input current Approx. 7 mA RMS (100 V AC/60 Hz)
ON voltage 80 V AC (min.) 4.5 mAOperating
voltage
Input lag
Number of input points See Chapter 4.
Number of common See Chapter 4.
Polarity None
Insulation system Photocoupler insulation
Input display LED (green)
External connection 14-, 28-point types: Removable type screw
*1: Delay by hardware only. Delay by digital filter (software filter) 0.5 to 20 ms is not included.
*2: Common terminals are separated each other.
OFF voltage 30 V AC (max.) 2 mA
OFF → ON
ON → OFF
Approx. 14.6 kΩ (60 Hz)
Approx. 17.6 kΩ (50 Hz)
25 ms (max.) *1
30 ms (max.) *1
terminal block (M3)
0
1
C
Internal circuit
3-7
Chapter 3 Function and Performance Specifications
3.3.3 Output Specifications
(1) DC output
(Y100 of EH-*23DRP/A23DRT/*28DRP/*28DRT)
Item Specification Circuit diagram
Type EH-A23DRT
EH-*28DRT
Y100 output specifications Transistor output
(sink type)
EH-*23DRP
EH-*28DRP
Transistor output
(source type)
Rated load voltage 24 / 12 / 5 V DC
24 V DC +20 %, -80 %
Minimum switching current 1 mA
Leak current 0.1 mA (max)
Maximum
load current
1 circuit 0.75 A 24 V DC
0.5 A 12 V DC
0.25 A 5 V DC
1 common 0.75 A
OFF → ON 0.1 ms (max) 24 V DC 0.2 AOutput
response time
ON → OFF 0.1 ms (max) 24 V DC 0.2 A
Number of output points 1
Number of common 1
Surge removing circuit None
Fuse None
Insulation system Photocoupler insulation
Output display LED (green)
External connection Removable type screw terminal block (M3)
External power supply *1
Not necessary 30 to 16 V DC
to V terminal
Insulation 1500 V or more (external-internal)
500 V or more (external-external)
Output voltage drop 0.3 V DC (max)
*1: It is necessary to supply 16 to 30 V DC between the V and C terminals externally for the source type.
The sink type operates by load power supply only. See “4.6 Terminal Layout and Wiring” for the details.
Sink type (23/28DRT)
Internal circuit
Source type (23/28DRP)
Internal circuit
0
C0
V0
0
C0
3-8
Chapter 3 Function and Performance Specifications
(2) DC output: LCDC-Low Current
(All points of EH-D10DT/DTP, Y102-Y105 of EH-D14DT/DTP, Y102-Y109 of EH-D28DT/DTP,
Y*018-Y*021 of EH-D14EDT/D14EDTP)
Item Specification
Output specification Transistor output
Sink type (EH-D**DT)
Rated load voltage 24/12 V DC (+10 %, -15 %)
Minimum switching current 1 mA
Leak current 0.1 mA (max)
Maximum
load current
1 circuit 0.75 A 24 V DC
0.5 A 12 V DC
Internal circuit Internal circuit
1 common 3 A
OFF → ON 0.1 ms (max) 24 V DC 0.2AOutput
response time
ON → OFF 0.1 ms (max) 24 V DC 0.2A
Number of output points See Chapter 4.
Number of common See Chapter 4.
Source type (EH-D**DTP)
Surge removing circuit None
Fuse None
Insulation system Photocoupler insulation
Output display LED (green)
Internal circuit
External connection Removable type screw terminal block (M3)
Externally supplied power *1 30 to 12 V DC
Insulation 1500 V or more (external-internal)
500 V or more (external-external)
Output voltage drop 0.3 V DC (max)
*1: It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”
Circuit diagram
V0
0
C0
V0
0
C0
(3) DC output: HCDC-High Current
Y100,Y101
(
Y*016, Y*017
of EH-D14DT/DTP,
of EH-D14EDT/D14EDTP)
Item Specification
Output specification Transistor output
Rated load voltage 24/12 V DC (+10 %, -15 %)
Minimum switching current 1 mA
Leak current 0.1 mA (max)
1 circuit 1A 24 V DCMaximum
load current
1 common 3 A
OFF → ON 0.1 ms (max) 24 V DC 0.2AOutput
response time
ON → OFF 0.1 ms (max) 24 V DC 0.2A
Number of output points See Chapter 4.
Number of common See Chapter 4.
Surge removing circuit None
Fuse None
Insulation system Photocoupler insulation
Output display LED (green)
External connection Removable type screw terminal block (M3)
Externally supplied power *1 30 to 12 V DC
Insulation 1500 V or more (external-internal)
Output voltage drop 0.3 V DC (max)
*1: It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”
Y100, Y101, Y110, and Y111
500 V or more (external-external)
of EH-D28DT/DTP,
Circuit diagram
Sink type (EH-D**DT)
V0
Internal circuit
0
C0
Source type (EH-D**DTP)
V0
0
C0
3-9
Chapter 3 Function and Performance Specifications
(4) DC output (ESCP type): HCDC-High Current
(Y100,Y101 of EH-D14DTPS, Y100-Y103 of D28DTPS)
Y*016,Y*017 of EH-EDTPS, Y*016-Y*019 of EH-D28EDTPS)
Item Specification
Output specification Transistor output
Rated load voltage 24/12 V DC (+10 %, -15 %)
Minimum switching current 10 mA
Leak current 0.1 mA (max)
load current
1 circuit 1 AMaximum
1 common 3 A
Source type (EH-D**DTPS)
OFF → ON 0.05 ms (max) 24 V DC 0.2AOutput
response time
ON → OFF 0.05 ms (max) 24 V DC 0.2A
Number of output points See Chapter 4.
Number of common See Chapter 4.
Surge removing circuit None
Fuse None
Insulation system Photocoupler insulation
Output display LED (green)
External connection Removable type screw terminal block (M3)
Externally supplied power *1 30 to 12 V DC
Insulation 1500 V or more (external-internal)
500 V or more (external-external)
Output voltage drop 0.3 V DC (max)
*1: It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”
Circuit diagram
V0
Internal circuit
0
C0
(5) DC output (ESCP type): LCDC-Low Current
(Y102-Y105 of EH-D14DTPS, Y104-Y111 of EH-D28DTPS
Y*018-Y*021
of EH-D14EDTPS,
Item Specification
Output specification Transistor output
Rated load voltage 24/12 V DC (+10 %, -15 %)
Minimum switching current 10 mA
Leak current 0.1 mA (max)
1 circuit 0.7 AMaximum
load current
1 common 3 A
OFF → ON 0.5 ms (max) 24 V DC 0.2AOutput
response time
ON → OFF 0.5 ms (max) 24 V DC 0.2A
Number of output points See Chapter 4.
Number of common See Chapter 4.
Surge removing circuit None
Fuse None
Insulation system Photocoupler insulation
Output display LED (green)
External connection Removable type screw terminal block (M3)
Externally supplied power *1 30 to 12 V DC
Insulation 1500 V or more (external-internal)
Output voltage drop 0.3 V DC (max)
*1: It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”
Y*020-Y*027
of EH-D28EDTPS)
500 V or more (external-external)
Circuit diagram
Source type (EH-D**DTPS)
V0
Internal circuit
0
C0
3-10
Chapter 3 Function and Performance Specifications
(6) Relay output
Item Specification Circuit diagram
Rated load voltage 5 to 250 V AC, 5 to 30 V DC
Minimum switching current 1 mA
1 circuit 2 A (24 V DC, 240 V AC)Maximum
load current
Output
response time
Number of output points See Chapter 4.
Number of common See Chapter 4.
Surge removing circuit None
Fuse None
Insulation system Relay insulation
Output display LED (green)
External connection Removable type screw terminal block (M3)
Externally supplied power
(for driving the relays)
Contact life *1 20,000,000 times (mechanical)
Insulation 1500 V or more (external-internal)
*1: Refer to the Life curve of relay contacts in Chapter 10 for the details.
1 common 5 A
OFF → ON
ON → OFF
15 ms (max)
15 ms (max)
Not necessary
200,000 times (electrical: 2 A)
500 V or more (external-external)
0
Internal circuit
1
C
(7) AC output (SSR)
Item Specification Circuit diagram
Output specification Triac output
Rated voltage 100/240 V AC
Output voltage 100 –15 % to 240 +10 % V AC
50 –5 % to 60 +5 % Hz
1 circuit 0.5 A 240 V ACMaximum
load current
Minimum load current 100 mA
Maximum leakage current 1.8 mA 115 V AC(max)
Maximum inrush current 5 A (at 1 cycle or less)/point
Maximum
delay time
Output common See Chapter 4.
Polarity See Chapter 4.
Insulation system Phototriac insulation
Fuse *2 Used
Surge removing circuit Sunabar circuit + varistor
External connection Removable terminal block
Voltage drop 1.5 V RMS (max)
Insulation 1500 V or more (external-internal)
*2: It is necessary to repair the module if the load short-circuits and causes the fuse to melt.
Note that the fuse cannot be replaced by users.
1 common 2 A
3.5 mA 230 V AC(max)
10 A (at 1 cycle or less)/common
Off → On
On → Off
1 ms or less
1 ms + 1/2 cycle or less
500 V or more (external-external)
Internal circuit
0
1
C
3-11
Chapter 3 Function and Performance Specifications
3.3.4 High-Speed Counter Specifications
Single phase Two phase
Available input X0, X2, X4, X6 X0 and X2 in pair
Input voltage ON 15 V
OFF 5 V
Count pulse width
Maximum count frequency 10 kHz each channel
Count register 16 bits
Coincidence output Allowed
On/Off-preset Allowed
Upper/lower limit setting Not allowed
Preload/strobe Allowed
Since 10 points type does not have input X6, counter channel is up to 3 ch.
100 µs
3.3.5 PWM Output/Pulse Train Output Specifications
23-point and 28-point type
Relay Output
Available outputs Y100 (optional) Y100-Y103 (optional)
Load voltage 5/12/24 V 12/24 V
Minimum load current 1 mA
PWM max. output frequency *1 2 kHz total channels
Pulse train max. output frequency *1 5 kHz total channels
Pulse acceleration/deceleration By FUN 151.
*1: Relay outputs cannot keep up with high frequencies; these outputs should be used at the operating frequency upon confirmation.
10/14/28-point
Transistor Output
3.3.6 Analogue Input Specifications
Module type 23 points module Analog exp. unit
Input channel WX30, WX31 WX u01 - WX u04
(u : unit number)
Input range
Resolution 12 bits
Accuracy ±1 % of full scale
Linearity Max. +/-3 units
Current input impedance
Voltage input impedance
Input delay time 20 ms
Channel to internal circuit insulation Not insulated Insulated
Channel-to-channel insulation Not insulated
0-10 V (10.24V max.) 0-10V (10.24V max.)
-10 to +10V (±10.24V max.)
0-20 mA (20.48 mA max.) 0-20 mA (20.48 mA max.)
- 4-20 mA (20.38 mA max.)
Approx. 249 Ω
Approx. 100 kΩ Approx. 200 kΩ
3-12
Chapter 3 Function and Performance Specifications
Circuit diagram (23 points type) Circuit diagram (Analog expansion unit)
Current
Voltage
IN2JP
IN2+
Internal circuit
IN2-
IN1JP
IN1+
IN1-
IN4JP
IN4+
Current
IN4-
IN1JP
IN1+
Voltage
IN1-
3.3.7 Analogue Output Specifications
Module type 23 points type module Analog exp. unit
Output channel WY40 WY u06, WY u07
(u : unit number)
Output range
Resolution 12 bits
Accuracy ±1 % of full scale
Current output
Allowable load
Output allowable capacity
Output allowable inductance
Voltage output
Allowable load
Output allowable impedance
0-10V (10.24V max.) 0-10V (10.24V max.)
0-20mA (20.48mA max.) 0-20mA (20.48mA max.)
4-20mA (20.38mA max.)
10 to 500 Ω
Maximum 2000 pF
Maximum 1 H
Maximum 10 kΩ
Maximum 1 µF
Internal circuit
Circuit diagram (23 points type) Circuit diagram (Analog expansion unit)
Voltage
Internal circuit
Voltage
Current
Internal circuit
IO7
IO6
Current
3-13
Chapter 3 Function and Performance Specifications
3.3.8 Potentiometer Analogue Input Specifications
Number of potentiometer inputs 2
Stored in
Input range 0-1023 (H0-H3FF)
Resolution 10 bits
Input filter By user settings
Ch.1 : WRF03E, Ch.2 WRF03F
3.3.9 Interrupt Input Specifications
Input that can be used X1, X3, X5, X7 (by user settings)
ON 15 VInput voltage
OFF 5 V
3.3.10 Backup
(1) Battery
Data memory (retentive area) can be kept by EH-MBAT battery as below.
Battery life time (total power off time) [Hr] *
Guaranteed value (Min.) @55°C Actual value (Max.) @25°C
9,000 18,000
* Battery life time has been changed since Oct. 2002 production (MFG NO.02Jxx) due to hardware modification.
Battery can be mounted inside of front cover.
Battery is available only for 23-point and 28-point types.
If the calendar clock function is used with the 23-point or 28-point type, be sure to use the battery.
(2) Capacitor
14-point type: Data can be kept for 72 hours (at 25 °C) by the capacitor.
23 and 28-point types: Data can be kept for 24 hours (at 25 °C) by the capacitor.
Please note that data memory of 10 point type cannot be retained.
3.3.11 Expansion
• Up to 4 times of expansion units can be installed.
• 14 points and 28 points digital units, and 4ch. input / 2 ch. output analog expansion units available.
• A cable with a length of up to 1 m can be used to connect between units.
• The total extension cable length can be up to 2 m (from the basic unit to the expansion unit at the end).
• The 10-point type unit cannot be expanded.
3-14
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