LS Industrial Systems GLOFA GM7U Series User manual

y Read this manual carefully before installing,
wiring, operating, servicingor inspecting
this equipment.
y Keep this manual within easy reach
for quick reference.
Programmable Logic Controller
GLOFA GM7U

SAFETY INSTRUCTIONS
DANGER
■The meaning of each symbol on the equipment is shown below.
WARNING
CAUTION
To prevent injury and property damage, follow these instructions.
Incorrect operation caused by ignoring instructions may cause harm or
damage. The consequences are indicated by the following symbols.
This symbol indicates the possibility of death
or serious injury.
This symbol indicates the possibility of injury
or damage to property.
This symbol indicates instant death or
serious injury.
This is the safety alert symbol.
Read and follow instructions carefully to avoid dangerous situation.
This symbol alerts the user to the presence of “dangerous voltages”.
Harm or electric shock may occur inside of these areas.

SAFETY INSTRUCTIONS
Design Precautions
Install a safety circuit external to the PLC that keeps the entire system
safe even when there are problems with the external power supply or
the PLC module. Otherwise, serious problems such as erroneous
outputs or operations may occur.
-Outside the PLC, construct mechanical damage preventing interlock
circuits. These include emergency stop, protective circuits, positioning
upper and lower limits switches and interlocking forward/reverse
operation.
When the PLC detects watchdog timer error, module interface error, or
other hardware errors, it will stop calculation and turn off all output.
However, one or more outputs could be turned on when there are
problems that the PLC CPU cannot detect, such as malfunction of output
device (relay, transistor, etc.) themselves or I/O controller. Build a fail
safe circuit exterior to the PLC to insure the equipment operates safely at
such times. Also, build an external monitoring circuit to monitor any
single outputs that could cause serious problems.
Make sure all external loads connected to output does NOT exceed
the rating of the output module.
Over current exceeding the rating of the output module could cause fire,
damage or malfunction.
Build a circuit that turns on the external power supply when the PLC
main module power is turned on.
If the external power supply is turned on first, it could cause an erroneous
output or operation.
Warning

SAFETY INSTRUCTIONS
Design Precautions
Installation Precautions
Do not bunch the control wires or communication cables with the main
circuit, power wires, or close together. They should be installed 100mm
(3.94 inches) or more from each other.
Not doing so could result in noise that may cause erroneous operation.
Use the PLC in an environment that meets the general specification
contained in this manual or datasheet.
Using the PLC in an environment outside the range of the general
specifications could result in electric shock, fire, erroneous operation, and
damage to the product.
Completely turn off the power supply before loading or unloading the
module.
Not doing so could result in electric shock or damage to the product.
Make sure all modules are loaded correctly and securely.
Not doing so could cause a malfunction, failure, and/or drop.
Make sure I/O and extension connectors are installed correctly.
Poor connection could cause an input or output failure.
When install the PLC in a vibrating environment, be sure to insulate
the PLC from direct vibration.
Not doing so could cause electric shock, fire, and/or erroneous operation.
Be sure that there are no foreign substances such as conductive
debris inside the module.
Conductive debris could cause fires, damage, and/or erroneous operation.
Caution
Caution

SAFETY INSTRUCTIONS
Wiring Precautions
Completely turn off the external power supply when installing or wiring.
Not turning off the external power supply may cause an electric shock
or damage to the product.
Make sure that all terminal covers are correctly attached.
Not attaching the terminal cover could result in an electric shock.
Be sure that wiring is done correctly by checking the product’s rated
voltage and the terminal layout.
Incorrect wiring could result in fire, damage, or erroneous operation.
Tighten the terminal screws with the specified torque.
Loose terminal screws, it could result in short circuits, fire, or
erroneous operation.
Be sure to ground the FG or LG terminal to the protective ground
conductor.
Not doing so could result in erroneous operation.
Be sure there are no foreign substances such as sawdust or wiring
debris inside the module.
Such debris could cause fire, damage, or erroneous operation.
Warning
Caution

SAFETY INSTRUCTIONS
Startup and Maintenance Precautions
Disposal Precaution
Do not touch the terminals while power is on.
This may cause an electric shock or erroneous operation.
Switch all phases of the external power supply off when cleaning the
module or retightening the terminal or module mounting screws.
Not doing so could result in electric shock or erroneous operation.
Do not charge, disassemble, heat, place in fire, short circuit, or solder
the battery.
Mishandling of the battery could cause overheating or cracks resulting
in in
j
ur
y
and/or fires.
Do not disassemble or modify the modules.
Doing so could cause erroneous operation, injury, or fire.
Switch all phases of the external power supply off before mounting or
removing the module.
Not doing so could cause failure or malfunction of the module.
Use cellular phones or walky-talkies more than 30cm (11.81 inch)
away from the PLC.
Not doing so could cause a malfunction.
When disposing of this product, treat it as industrial waste.
Not doing so could cause environmental damage or explosion.
Warnin
g
Caution
Caution

◎ Contents ◎
Chapter 1. General
1.1 Guide to Use This Manual ················· 1 - 1
1.2 Feature ························ 1 - 2
1.3 Terminology ······················ 1 - 4
Chapter 2. System Configuration
2.1 Overall Configuration ··················· 2 - 1
2.1.1 Basic System································································································2 - 1
2.1.2 Cnet I/F System·····························································································2 - 2
2.2 Product List ······················ 2 - 4
2.2.1 Product Functional Block·················································································2 - 4
2.2.2 GM7U Series System Equipment Product···························································2 - 5
Chapter 3. General Specifications
3.1 General Specifications ·················· 3 - 1
Chapter 4. Names of Parts
4.1 Main Units ······················· 4 - 1
4.1.1 60 Points Main Unit ······················································································4 - 2
4.1.2 40 Points Main Unit ······················································································4 - 5
4.1.3 30 Points Main Unit ······················································································4 – 8
4.1.4 20 Points Main Unit ·····················································································4 - 10
4.2 Expansion Modules···················· 4 - 14
4.2.1 20 Points I/O Expansion Module ······································································4 - 14
4.2.2 16 Points I/O Expansion Module ······································································4 - 14
4.2.3 10 Points I/O Expansion Module ······································································4 - 15
4.2.4 8 Points I/O Expansion Module········································································4 - 15
4.3 Special Modules···················· 4 - 17
4.3.1A/D·D/ACombination Module········································································4 - 17
4.3.2 D/AConversion Module··················································································4 - 18
4.3.3A/D Conversion Module··················································································4 - 19
4.3.4Analog Timer Module·····················································································4 - 20
4.3.5 RTD Input Module·························································································4 - 20

4.4 Communication I/F Module ················· 4 - 21
4.4.1 Cnet I/F Module····························································································4 - 21
4.4.2 Fnet I/F Module····························································································4 - 21
4.4.3 Pnet I/F Module····························································································4 - 22
4.4.4 DeviceNet I/F Module ····················································································4 - 22
4.4.5 Rnet I/F Module····························································································4 - 22
Chapter 5. Power Supply / CPU
5.1 Power Supply Specifications ················ 5 - 1
5.1.1AC Power Supply···························································································5 - 1
5.3.2 DC Power Supply ··························································································5 - 1
5.2 CPU Specifications···················· 5 - 2
5.3 Operation Processing ··················· 5 -5
5.3.1 Operation Method··························································································5 - 5
5.3.2 Operation Processing at Momentary Power Failure···············································5 - 6
5.3.3 Scan Time····································································································5 - 7
5.3.4 Scan Watchdog Timer····················································································· 5 - 7
5.3.5 Timer Processing ························································································· 5 - 8
5.3.6 Counter Processing························································································5 - 9
5.4 Program························································································5 - 12
5.4.1Program Configuration ··················································································5 - 12
5.4.2 Program Execution Procedure·········································································5 - 12
5.4.3Task············································································································5 - 15
5.4.4 Error Handling······························································································5 - 22
5.5 Operation Modes ···················· 5 - 23
5.5.1 RUN Mode··································································································5 - 23
5.5.2 STOP Mode·································································································5 - 24
5.5.3 PAUSE Mode·······························································································5 - 24
5.5.4 DEBUG Mode······························································································5 - 24
5.5.5 Operation Mode Change ················································································5 - 25
5.6 Functions ······················· 5 - 27
5.6.1 Restart Mode·······························································································5 - 27
5.6.2 Self-diagnosis ····························································································5 - 29
5.6.3 Remote Function··························································································5 - 29
5.6.4 I/O Force On/Off Function··············································································5 – 30
5.6.5 Direct I/O Operation Function·········································································5 – 31
5.6.6 External Device Error Diagnosis Function··························································5 – 31

5.7 Memory Configuration··················· 5 - 33
5.8 I/OAllocation Method ··················· 5 - 35
5.9 Built-in Cnet Communication Setting Switch ········································5 - 35
5.9.1 Structure·····································································································5 - 35
5.9.2 Usage········································································································5 - 36
5.10 External Memory Module ················· 5 - 37
5.10.1 Structure···································································································5 - 37
5.10.2 Usage·······································································································5 - 37
5.11 RTC Option Module ··················· 5 - 39
5.11.1 Specifications····························································································5 – 39
5.11.2 Structure ··································································································5 – 40
5.11.3 Usage······································································································5 – 40
5.11.4 Read RTC Data ·························································································5 – 41
5.11.5 Write RTC Data··························································································5 – 42
Chapter 6. Input and Output Specifications
6.1 Input / Output Specifications ················ 6 - 1
6.2 Digital Input Specifications ················· 6 - 2
6.2.1 Main Unit ·····································································································6 - 2
6.2.2 Expansion Module ·························································································6 - 6
6.3 Digital Output Specifications ················ 6 - 7
6.3.1 Main Unit (Relay Output)·················································································6 - 7
6.3.2 Main Unit (NPN TR Output)·············································································6 - 10
6.3.3 Main Unit (PNPTR Output)·············································································6 - 13
6.3.4 Expansion Module (Relay Output) ····································································6 - 16
6.3.5 Expansion Module (TR Output)········································································6 - 17

Chapter 7. Usage of Various Functions
7.1 Built-in Functions ···················· 7 - 1
7.1.1 High Speed Counter Function··········································································· 7 - 1
7.1.2 Pulse Catch·································································································7 - 16
7.1.3 Input Filter···································································································7 - 17
7.1.4 PID Control ·································································································7 - 19
7.2 Special Modules····················· 7 - 42
7.2.1A/D·D/ACombination Module········································································7 - 43
7.2.2A/D Conversion Module··················································································7 - 54
7.2.3 D/AConversion Module··················································································7 - 61
7.2.4Analogue Timer ··························································································7 - 68
7.2.5 RTD input Module ·······················································································7 - 70
7.3 Positioning Function ··················· 7 - 77
7.3.1 Specification································································································7 - 77
7.3.2 Positioning Function······················································································7 - 80
7.3.3 Positioning parameter and Operation Data·························································7 - 93
7.3.4 Instructions ······························································································7 - 100
7.3.5 Flag list and Error codes ············································································ 7 – 110
7.3.6 Wiring with Servo and Stepping Motor Drive ·················································· 7 – 114
Chapter 8. Communication Functions
8.1 Dedicated Protocol Communication ·············· 8 - 1
8.1.1 Introduction ··································································································8 - 1
8.1.2 System Configuration Method···········································································8 - 2
8.1.3 Frame Structure ····························································································8 - 5
8.1.4 Commands List·····························································································8 - 7
8.1.5 Data Type ····································································································8 - 8
8.1.6 Command Command······················································································8 - 9
8.1.7 1:1, 1:N Built-in Communication between LSIS Products ·····································8 - 25
8.1.8 Error Codes································································································8 – 37
8.1.9 LS Inverter-dedicated Protocol·········································································8 - 38

8.2 User Defined Protocol Communication ············· 8 - 41
8.2.1 Introduction ·································································································8 - 41
8.2.2 Parameter Setting·························································································8 - 41
8.2.3 Function Block ····························································································8 - 49
8.2.4 Example ·····································································································8 - 50
8.3 Modbus Protocol Communication··············· 8 - 62
8.3.1 Introduction ·································································································8 - 62
8.3.2 Basic Specifications ······················································································8 - 62
8.3.3 Parameter Setting·························································································8 - 66
8.3.4 Function Block ····························································································8 – 68
8.3.5 Example ····································································································8 – 79
8.4 No Protocol Communication ················ 8 - 83
8.4.1 Introduction ·································································································8 - 83
8.4.2 Parameter Setting·························································································8 - 84
8.4.3 Function Block ·····························································································8 - 85
8.4.4 Examples····································································································8 - 87
8.5 Remote Connection and Communication I/F module ········ 8 - 89
8.5.1 Remote Connection·······················································································8 - 89
8.5.2 Communication I/F Module ·············································································8 - 93
Chapter 9. Installation and Wiring
9.1 Installation ······················· 9 - 1
9.1.1 Installation Environment··················································································9 - 1
9.1.2 Handling Instructions······················································································ 9 - 3
9.1.3 Connection of Expansion Module······································································ 9 - 6
9.2 Wiring ························ 9 - 7
9.2.1 Power Supply Wiring ······················································································9 - 7
9.2.2 Input and Output Devices Wiring·······································································9 - 8
9.2.3 Grounding····································································································9 - 9
9.2.4 Cable Specifications for wiring··········································································9 - 9

Chapter 10. Maintenance
10.1 Maintenance and Inspection ················ 10 - 1
10.2 Daily Inspection ···················· 10 - 1
10.3 Periodic Inspection ··················· 10 - 2
Chapter 11. Troubleshooting
11.1 Basic Procedure of Troubleshooting ············· 11 - 1
11.2 Troubleshooting ············································································ 11 - 1
11.2.1 Flowchart for when the “POWER” LED turned off ··············································11 - 2
11.2.2 Flowchart for when the “ERRORR” LED is flashing·············································11 - 3
11.2.3 Flowchart for when the “RUN” LED turned off····················································11 - 4
11.2.4 Flowchart for when the I/O devices does not operate normally ······························11 - 5
11.2.5 Flowchart for when unable to write a program to the CPU ····································11 - 7
11.3 Troubleshooting Questionnaire························································· 11 - 8
11.4 Troubleshooting Examples······························································· 11 - 9
11.4.1 Input circuit troubles and corrective actions·······················································11 - 9
11.4.2 Output circuit troubles and corrective actions···················································11 - 10
11.5 Error Code List·············································································11 - 12
Appendix··················································································································
Appendix 1 System Definitions·······························································App1-1
Appendix 2 Flag Lists···········································································App2-1
Appendix 3 Function/Function Block Lists·················································App3-1
Appendix 4 External Dimensions····························································App4-1

Chapter 1. General
1-１
Chapter 1. General
1.1 Guide to Use This Manual
This manual includes specifications, functions and handling instructions for the GLOFA-GM 7U series PLC.
This manual is separated into the following chapters:
No. Title Contents
Chapter 1 General Describes the contents of this manual, the features of the PLC and
terminologies
Chapter 2 System Configuration Describes available units and system configurations for the GLOFA-GM7U
series
Chapter 3 General Specifications Describes general specifications of the units used in the GLOFA-GM7U series
Chapter 4 Names of Parts Describes each component, names, and main functions
Chapter 5 Power Supply / CPU
Chapter 6 Input and Output
Specifications
Chapter 7 Usage of Various
Functions
Describes each component’s usage
Chapter 8 Communication
Functions Describes built-in communication functions
Chapter 9 Installation and Wiring Describes installation, wiring and handling instructions for insuring the reliability
of the PLC system
Chapter 10 Maintenance Describes the checklist and method for long-term normal operation of the PLC
system
Chapter 11 Troubleshooting Describes various operation errors and the corresponding corrective actions
Appendix 1 System Definitions Describes parameter settings for the basic I/O and communication modules
Appendix 2 Flag Lists Describes the types and descriptions of various flags
Appendix 3 Function / Function
Block Lists Describes the types and descriptions of various Functions / Function Blocks
Appendix 4 Dimensions Shows dimensions of the main units and expansion modules
REMARK
This manual does not describe the programming method. For these functions, refer to the related user's manuals.

Chapter 1. General
1-２
1.2 Feature
1) GLOFA-GM7U series have the following features.
1) GLOFA-GM series features
(1) Designed on the basis of international standard specifications (IEC61131-3)
ySupports easy programming
yProvides IEC61131-3 Language (IL / LD / SFC)
(2) Supports an open network by the international standard communication protocol
(3) High speed processing with an embedded operation-dedicated processor.
(4) Various special modules that enlarge the PLC application range
2) GM7U series are extremely compact to fit a wide range of applications.
(1) High speed processing
High speed processing with 0.1~0.9 μs/step
(2) Various built-in functions
Only with the base unit, the user can configure various systems because it has many built-in functions.
•Fast Processing Applications
-Pulse catch: allows the base unit to read a pulse stably as short as 10μs
-High-speed counter: supports high-speed counting up to 1 phase 100kHz, and 2 phase 50kHz
-External contact interrupts: enables the applications which require immediate responses by using a built-in 8-point
interrupt input
•The input filter function helps to reduce the possibility of false input conditions from external noise, such as signal
chattering. The filter time can be programmed from 0 to 1000 ms.
•The built-in positioning control function enables to control a stepping motor or a servo motor without a separate
positioning module. (DRT, DT type)
•Using RS-232C and RS-485 built-in ports, GM7U can connect to external devices, such as computers or
monitoring devices. These devices can communicate 1:1 with the GM7U or GM6 system.
•Using the built-in PID control function, the PID control system can be configured easily without using separate
PID module.
(3) The user can easily turn On/Off the system with RUN/STOP switch.
(4) The user can configure various systems using a separate Cnet I/F module.
(5) The user program can be easily saved in EEPROM by simple manipulation in GMWIN without using external memory.
(6) Advanced self-diagnostic functions
- GLOFA-GM7U series can detect the errors precisely with more detailed error codes.
(7) Unintentional reading and writing can be prevented by using a password.
(8) Restart mode setting
- The user can select Cold/Warm restart mode.

Chapter 1. General
1 - 3
(9) Battery-less
- With the EEPROM, the user program and parameter can be saved permanently without the battery.
(10) Debugging function
On-line debugging is available if the PLC Operation mode is set to debug mode.
yExecuted by one command
yExecuted by break-point settings
yExecuted by the condition of the device
yExecuted by the specified scan time
(11) Various program execution function
-Timedriveninterrupt,externalandinternalinterruptprogramsaswellasscanprogramscanbeexecutedbysettingtheexecutioncondition.
Thisallowstheusertosetvariousprogramexecutionmodes.

Chapter 1. General
1 - 4
1.3 Terminology
The following table gives a definition of terms used in this manual.
Terms Definition Remarks
Module A standard element that has a specified function which
configures the system. The devices such as I/O board, which
inserted onto the mother board or base unit.
Example)
CPU module,
Power supply
module,
I/O module
Unit A single module or group of modules that perform an independent
Operation as a part of PLC system.
Example)
Main unit
PLC System A system which consists of the PLC and peripheral devices. A
user program can control the system.
Cold Restart
To restart the PLC system and user programs after all of the
data (variables and programs of I/O image area, of internal
register, of timer of counter) were set to the specified
conditions automatically or manually.
Warm Restart
In the warm restart mode, the power supply Off occurrence will
be informed to the user program and the PLC system restarts
with the previous user-defined data and user program after the
power supply Off.
Hot Restart After the power went off, the PLC system restores the data to the previous conditions and restarts in the maximum allowed
time.
I/O Image
Area Internal memory area of the CPU module which used to hold I/O statuses.
Watch Dog
Timer Supervisors the pre-set execution times of programs and warns if a program is not completed within the pre-set time.
Function Operation Unit which outputs immediately its operation result of an input, while four arithmetic operations comparison operation
store their results in the inside of instructions.
Function
Block
Operation Units which store operation result in the inside of
instruction such as timer and counter and use the operation
results which have been stored through many scans.
Direct
Variable Variables used without the definition of their names and types. There are I, Q, M areas.
Example)
y%IX0.0.2
y%QW1.2.1
y%MD1234 etc.

Chapter 1. General
1 - 5
Terms Definition Remarks
Symbolic
Variable
Variables used after the user’s definition of their names and
types. Declarations as ‘INPUT_0’ = %IX0.0.2, ‘RESULT
= %MD1234’ makes INPUT_0 and RESULT be able to used
instead of %IX0.0.2 and %MD123 in programming.
GMWIN A peripheral device for the GLOFA-GM series. It executes
program creation, edit, compile and debugging.
FAM Abbreviation of the word ‘Factory Automation Monitoring S/W’.
It is used to call S/W packages for process supervision.
Task
It means startup conditions for a program. There are three
types of periodic task, internal contact task and external
contact task which starts by the input signals of external input
modules.
RTC Abbreviation of ‘Real Time Clock’. It is used to call general IC
that contains clock function.
Sink Input
Current flows from the switch to the PLC input terminal if a
input signal turns on.
Source Input
Current flows from the PLC input terminal to the switch after an
input signal turns on.
Sink Output
Current flows from the load to the output terminal and the PLC
output turn on.
Output
Contact

Chapter 1. General
1 - 6
Terms Definition Remarks
Source
Output
Current flows from the output terminal to the load and the PLC
output turn on.
Fnet Fieldbus Network
Cnet Computer Network
Dnet DeviceNet Network

Chapter 2. System Configuration
2-1
Chapter 2. System Configuration
The GLOFA-GM7U series has suitable to configuration of the basic, computer link and network systems.
This chapter describes the configuration and features of each system.
2.1 Overall Configuration
2.1.1 Basic system
Total I/O points 20 ~ 120 points
Digital I/O module 3
A/D-D/A module 3
Analog timer 3
Maximum
number of
expansion
modules Cnet I/F module 1
•G7M-DR20,30,40,60U • G7M-DR20,30,40,60U/DC
•G7M-DRT20,30,40,60U(N) • G7M-DRT20,30,40,60U(N)/DC
•G7M-DT20,30,40,60U(N) • G7M-DRT20,30,40,60U(N)/DC
Main unit
•G7M-DT20,30,40,60U(P)
• G7M-DRT20,30,40,60U(P)/DC
Digital I/O G7E-DR10A/G7E-DR20A/G7E-TR10A/G7E-DC08A/G7E-RY08A/G7E-DR08A
G7E-RY16A
A/D,D/A G7F-ADHA/G7F-AD2A/G7F-DA2I/G7F-ADHB/G7F-DA2V/G7F-AD2B /G7F-ADHC
RTD Input G7F-RD2A
Expansi
on
module
Analog Timer G7F-AT2A
Cnet I/F G7L-CUEB,G7L-CUEC
DeviceNet I/F G7L-DBEA
Fnet I/F G7L-FUEA
Pnet I/F G7L-PBEA
Commu
nication
I/F
module
Rnet I/F G7L-RUEA
RTC G7E-RTCA
Item
Option
module Memory G7M-M256B (*1)
* G7M-M256 is not available for GM7U series. Please use G7M-M256B.
Main unit Expansion module
Expansion cable
Total 3 modules
(External Memory and RTC modules can
be connected as a 4th expansion module)

Chapter 2. System Configuration
2-2
2.1.2 Cnet I/F system
The Cnet I/F System are used for communication between the main unit and external devices using RS-232C/RS-422
Interface. The GM7U has a built-in RS-232C port, RS-485 port and has also G7L-CUEB for RS-232C, G7L-CUEC for
RS-422. It is possible to construct communication systems on demand.
1) 1:1 Communications system
(1) 1:1 communication between PC and GM7U via RS-232C built-in port
(2) 1:1 communication via modem connection function of Cnet I/F module to interface with long distance devices
RS-232C
GM7USeries
Modem Modem
G7L-CUEB G7L-CUEB
Modem
Modem
GM7USeries GM7USeries
G7L-CUEB
GM7USeries