LG GLOFA-GM Series User manual

LG Programmable Logic Controller
Cnet I/F Module
GLOFA-GM
G3L-CUEA
G4L-CUEA
G6L-CUEB
G6L-CUEC
G7L-CUEB
G7L-CUEC
User’s Manual
LG INDUSTRIAL SYSTEMS

This user’s manual describes functions of Cnet I/F module.
Please read this manual carefully to understand the functions thoroughly prior to system design.
Revision record Date of issue revised Contents revised
1
st edition 1st print
1
st revision 2000.01.10 -GM7 Cnet I/F module added
-Functions of frame editor Version 2.0 added
Revision record

Chapter 1 Introduction xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-1~1-7
1.1 Module selection per CPU type xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-2
1.2 Functions of Version 2.0 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-3
1.2.1 Version check xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-3
1.2.2 Added functions introduction of Version 2.0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-6
1.2.3 Established functions xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-7
1.2.4 Frame editor Version 2.0 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-7
1.2.5 Added function of Version 2.0 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1-7
Chapter 2 Definition of termsxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 2-1~2-6
Chapter 3 Product specification xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-1~3-12
3.1 General specification xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-1
3.2 Performance specifications xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-2
3.3 Cable specificationsxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-4
3.4 Terminating resistance xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-5
3.5 Structure xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-7
3.5.1 Part names of G3L-CUEA xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-7
3.5.2 Part names of G4L-CUEA xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-8
3.5.3 Part names of G6L-CUEB xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-9
3.5.4 Part names of G6L-CUEC xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-10
3.5.5 Part names of G7L-CUEB xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-11
3.5.6 Part names of G7L-CUEC xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 3-12
Chapter 4 Performance specification xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-1~4-33
4.1 Operating mode setting xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-1
4.1.1 Channel operation in interlocking mode xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-3
4.1.2 Channel operation in stand-alone mode xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-4
4.1.3 Channel operation in self diagnosis mode (Loop Back) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-5
4.2 Method of serial interfacexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-6
4.2.1 RS-232C interface xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-6
4.2.2 RS-422 interface xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-9
C ontents

4.3 How to set transmission specificationsxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-11
4.3.1 Setting items xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-11
4.3.2 How to set xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-12
4.3.3 Reading setting values xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-16
4.3.4 Transmission specification setting of Gm7 seriesxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-17
4.4 How to connect to modem xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-19
4.4.1 Connection to dedicated modem (RS-232C) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-20
4.4.2 Connection to dial-up modem (RS-232C) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 4-27
Chapter 5 Frame Editor xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-1~5-43
5.1 Basic functions xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-1
5.2 Screen configuration and menuxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-2
5.2.1 Basic parameter setting xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-6
5.2.2 Frame setting xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-7
5.2.3 Frame writing/readingxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-23
5.2.4 Monitor function xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-27
5.3 Managing function of flash memory xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-31
5.3.1 Writing of flash memory xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-31
5.3.2 Reading of flash memory xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-34
5.4 Changing of online mode xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-35
5.4.1 Changing of local operating modexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-35
5.4.2 Changing of remote operating modexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 5-39
Chapter 6 System configuration xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-1~6-11
6.1 System configuration availablexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-1
6.1.1 1:1 connection (no modem) to PC xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-1
6.1.2 1:1 dedicated modem connection to PC xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-2
6.1.3 Modem connection to PC & communication between Cnet I/F modulesxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-3
6.1.4 Communication between PC and Cnet using interlocking channelxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-4
6.1.5 Interlocking & stand-alone channel communicationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-5
6.1.6 Dedicated communication to PC & other company’s RS-422 communicationxxxxxxxxxxxxxxxxxxxxx 6-6
6.1.7 Optical modem communication for mobile communicationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-7
6.1.8 Wireless modem communication between revolution bodiesxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-8
6.1.9 TM/TC communication system xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-9

6.2 System configuration unavailable xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-10
6.2.1 Dial-up modem communication between Cnet I/F modulesxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-10
6.2.2 GMWIN connection using RS-422 channel of Cnet I/F module xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 6-11
Chapter 7 Communication program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-1~7-132
7.1 User defined communication xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-1
7.1.1 Introduction xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-1
7.1.2 User defined operation xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-2
7.1.3 User defined Function Block (SND_MSG,RCV_MSG) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-5
7.1.4 Example of user defined programming xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-12
7.1.5 User defined communication for Gm7 series xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-25
7.2 Dedicated communication slave xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-34
7.2.1 Introduction xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-34
7.2.2 Frame structure xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-35
7.2.3 List of commandsxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-38
7.2.4 Data type xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-40
7.2.5 Execution of commands (Ex.)xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx 7-42
7.3 Dedicated communication master (communication between Cnets)xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-94
7.3.1 Introduction xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-94
7.3.2 Function Block for dedicated communicationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-95
7.3.3 How to use dedicated Function Blockxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-97
7.3.4 Dedicated communication master for G7L-CUECxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-102
7.4 Other company’s dedicated mode xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-109
7.4.1 Introduction xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-109
7.4.2 Operating mode & downloading of communication driver xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-110
7.4.3 Specifications of A. B communication driver xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-114
7.4.4 Specifications of MODBUS communication driver xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-119
7.5 GMWIN remote connection xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-122
7.5.1 Introduction xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-122
7.5.2 GMWIN remote connection xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-122
7.5.3 Remote connection between Cnet I/F modulesxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 7-129
Chapter 8 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-1~8-66
8.1 TM (Tele Metering) system using dedicated modemxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-1
8.1.1 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-2

8.2 Communication system between Cnet I/F modules using optical modemxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-8
8.2.1 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-9
8.3 GMWIN connection using dial-up modemxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-21
8.3.1 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-21
8.4 Communication with GOLDSEC MJUC24xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-25
8.4.1 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-25
8.5 Communication with MASTER-K 1000Hxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-30
8.5.1 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-30
8.6 Communication with HEX communication equipment xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-36
8.6.1 Exercising program xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-36
8.7 Example of using G7L-CUECxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-45
8.7.1 Dedicated communication master xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-45
8.7.2 User’s definition xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 8-53
Chapter 9 Diagnosis function xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 9-1~9-6
9.1 Loop-Back self diagnosis xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 9-1
9.1.1 Principle of operationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 9-1
9.1.2 Procedure of Loop-Back self diagnosisxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 9-2
9.1.3 Operation of Loop-Back test LED xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 9-3
9.2 Diagnosis during power onxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 9 -6
Chapter 10 Installation and Testing operationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-1~10-9
10.1 Installation and testing operationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-1
10.1.1 Mounting and installation xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-2
10.1.2 Cautions during system installationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-4
10.1.3 Testing operationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-6
10.2 Maintenance and Check xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-8
10.2.1 Daily check xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-8
10.2.2 Regular check xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 10-9
Chapter 11 Troubleshooting xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-1~11-11
11.1 Abnormal operations xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-1
11.2 Troubleshooting by each error code xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-3
11.2.1 Error code ERR-1, ERR-2 : hardware & system error xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-3

11.2.2 Error code ERR-3 : communication command error xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-5
11.2.3 Error code ERR-4, ERR-5 : Receive monitor data error xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-7
11.2.4 Error code ERR-6, ERR-7 : Transmission monitor data error xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-8
11.2.5 Error code ERR-8, ERR-9 : Error on dedicated communication xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-9
11.2.6 Error code ERR-10 : error on GMWIN connection xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 11-11
Appendix xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-1~A-15
A.1 LED indication specificationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-1
A.1.1 Applicable type xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-1
A.1.2 LED indication specification during normal operationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-1
A.1.3 LED indication specification during abnormal operation xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-5
A.1.4 LED indication specification during power on xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-6
A.2 Error code table xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-7
A.2.1 Error code for user defined communicationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-7
A.2.2 Error code for dedicated slave communicationxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-9
A.2.3 Error code for dedicated master communication xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-11
A.3 Dimensions of appearancexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx A-12

Chapter 1 Introduction
1-1
Chapter 1 Introduction
This user’s manual describes Cnet (Computer network) I/F module of GLOFA PLC network system. Cnet is GLOFA
PLC network system using computer link module. Cnet has the connection function with different model to
communicate with communication devices of various different type protocols such as other company’s PLC and
computer, etc., and the function of modem communication to control remote PLC, and it has the following
characteristics.
Because communication speed and communication mode (protocol, etc.) are directly controlled by user using
program operative in Frame Editor of Windows environment, connection with other company’s products is easy.
Separate operations by channels are available through controlling each of other company’s protocol for channels
RS-232C and RS-422 (RS-485), and saving and using the protocol data controlled by user in internal flash
memory (128kbyte) are possible.
Variable reading/writing and program reading/writing are possible by using dedicated protocol.
Dedicated communication function suitable to multi-drop configuration connectable up to 32 units is provided.
With modem communication function built-in, remote PLC can be controlled by GMWIN connection, dedicated
communication, and user defined communication.
Communication port, RS-232C/RS-422 (RS-485) can be used by setting it to stand-alone or interlocking channel.
Various communication speeds can be set from 300bps to 76,800bps.
1:1/1:N/N:M communication (if RS-422 channel used) is available.
Communication types of full-duplex (RS-422/RS-232C) and half-duplex (RS-485) are supported.
Channel RS-422 can be used as multi-drop communication channel, RS-485 by basic parameter setting.
Modules can be mounted up to 8 units for GM1, GM2 and GM3, 4 units for GM4 and GM6, and 1 unit for GM7
(available only on the main base. And as linked with the basic module using an extended connector in case of
GM7.)
With satisfactory self-diagnosis function and Loop-Back diagnosis function, diagnosis of errors is easy to make.
With private functions of other products’ built-in, access is easy to such protocol as Modbus, A. B DF1. Ver.2.0

Chapter 1 Introduction
1-2
1.1 Module selection per CPU type
As 4 types of the modules are developed according to CPU types, appropriate module shall be selected for CPU type
and its service. [Table1.1] describes selection guide of module per CPU type.
[Table1.1] Module selection per CPU type
CPU type Module name Number of
channel Configuration supported Max. number mountable[Note2]
GLOFA-GMR[Note1] G3L-CUEA 2 RS-422 8[Note3]
GLOFA-GM1 G3L-CUEA 2 RS-232C/RS-422 8
GLOFA-GM2 G3L-CUEA 2 RS-232C/RS-422 8
GLOFA-GM3 G3L-CUEA 2 RS-232C/RS-422 8
GLOFA-GM4 G4L-CUEA 2 RS-232C/RS-422 4
G6L-CUEB 1 RS-232C 4
GLOFA-GM6 G6L-CUEB 1 RS-422 4
G7L-CUEB 1 RS-232C 1
GLOFA-GM7 G7L-CUEC 1 RS-422 1
Remark
[Note1] RS-422 channel only is available if mounted on duplicated base.
[Note2] This module can not be mounted on an extended base but on the basic base only.
[Note3] However, it can be mounted on slots No. 0~3 of duplicated extended base (for 8 slots) with max. 8 modules.

Chapter 1 Introduction
1-3
1.2 Functions of Version 2.0
This module has been operated in various application fields at home and abroad since released along with steady
increasing performance via continuous Version-Up to answer the diverse requests of customers and to reinforce the
reliability. Cnet I/F module has performed functional upgrade to Ver.2.0 reflected by the diverse requests of customers on
the basis of convenience, compliance and flexibility for users. Cnet I/F module Ver.2.0 has been designed so kept along
with the lower versions of products for functional compliance to use the established functions as same as 100%. Thus,
refer to this user’s manual for only added functions.
1.2.1 Version check [Note1]
O/S versions of Cnet I/F module are classified into CPU ROM O/S Ver. and Flash Memory O/S Ver. with the
differences below.
O/S Type Class Ver.2.0 Ver.1.7 or less[Note2]
Function Initial running and flash memory managing Performs all module
functions
Saving
location CPU ROM CPU ROM
Ver. check Using GMWIN’s I/O information function
CPU O/S
Ver. Up CPU ROM change CPU ROM change
Function Execution of all other functions than initial running N/A
Saving
location Flash memory N/A
Ver. check Using Frame Editor N/A
FLASH O/S
Ver.2.0
Ver. Up Using Frame Editor, upgrade by S/W N/A
Remark
[Note1] Cnet I/F module versions are classified as based on CPU O/S Ver. Namely, functions for Ver. 2.0 or later
mean that CPU O/S is of Ver.2.0 or later.
[Note2] Since modules of Ver.1.7 or less have CPU O/S only, O/S upgrade via flash memory is unavailable.

Chapter 1 Introduction
1-4
1) CPU O/S Ver. check
Cnet Ver.2.0 performs the most basic functions for initial running and flash memory operation and Ver.1.7 or less
performs all functions of Cnet. CPU O/S can be upgraded only by CPU change of Cnet I/F module. Versions of
Cnet I/F modules are classified on the basis of CPU O/S with the following procedure for version check.
A) If [I/O info…] selected after GMWIN [Online] connection, I/O information dialog box is displayed as below.
B) If applicable base is selected from I/O information dialog box, slot number in bold is displayed as a menu
available to select for communication module and special module. Click equivalent slot number to ‘GLOFA
Cnet’ to display the dialog box as in [Figure 1.1]. The succeeding figure to V in Vx.x indicates the version.
[Figure1.1] CPU O/S Ver. information
(a) Version information of Ver.1.7 (b) Version information of Ver. 2.0

Chapter 1 Introduction
1-5
2) FLASH O/S Ver. check
For Cnet I/F module Ver. 2.0 or later, all functions to embody Cnet functions are saved in flash memory, and version
check and upgrade are available through Frame Editor. Flash O/S version can be checked by Frame Editor if CPU
O/S is of Ver. 2.0 or later.
A) Select flash memory information with Frame Editor after Online connection.
B) Select slot number and O/S on which Cnet I/F module is mounted from the system information screen, and
click reading button to display the system information screen as below for version check of FLASH ROM.

Chapter 1 Introduction
1-6
1.2.2 Added functions introduction of Version2.0
[Table1.2] shows configuration of main functions of Ver.2.0.
[Table1.2] Configuration of main functions added to Ver.2.0.
Comparison between contents
Items Ver.1.0 ~ 1.7 Ver.2.0 or later Remark
On-line
Mode change
zOperatin
g
mode of module is
set via H/W using switch.
zMode change during
operation is unavailable.
zNo mode change function in
Frame Editor
zMode change during operation
is available with On-line mode
added to module.
zMode change with Frame
Editor
zOperating mode change is
available by remote control via
RS-232C channel.
Mode is changeable
by remote control
(only for RS-232C
channel).
Master
functions of
dedicated
communication
zCommunication between
Cnet I/F modules is incon-
venient as provided only with
dedicated communication
slave function.
zFrame definition and GMWIN
program need to be com-
posed in user defined mode.
zCommunication between Cnet
I/F modules is easy with
master function added to
dedicated mode.
zCommunication between Cnet
I/F modules is available using
dedicated ‘Function Block’
without frame definition.
Slave operation is
same as established
dedicated mode
operation (lower Ver.
of Cnet I/F module
can be used).
other
company’s
communication
driver built-in
zNo communication driver of
main other company’s pro-
tocol
zProtocol is defined and
composed by user with
Frame Editor in user defined
mode.
zA.B DF1 server protocol driver
built-in
zModbus ASCII/RTU server
protocol driver built-in
Service is available
by downloading
communication
library in frame
editor.
Support of
HEX input for
constant edit
zOnly ASCII data can be
input.
zSpecified as ARRAY if HEX
input.
zHEX can be set in constant
area.
zTrans. data is transmitted in
not ASCII but HEX.
Zero(00) code can’t
be input.
Flash
memory
operation
zCPU change is required as
Cnet O/S uses internal ROM
of built-in CPU for Ver.-Up.
zFlash memory is used by O/S.
zOther company’s dedicated
protocol can be used as
downloaded to flash memory.
Ver.-Up easy and
additional functions
of other company’s
driver under consi-
deration

Chapter 1 Introduction
1-7
1.2.3 Established functions
Ver. 2.0 has been designed in 100% of compliance with the established versions and hardware configuration is the
same as the former versions of products as upgraded via software Ver.-Up without hardware change. Accordingly,
mounting and communicating connection with PLC CPU, user defined communication, dedicated communication,
GMWIN connection, modem communication function, etc. are available as same as in the established functions.
1.2.4 Frame Editor Version 2.0
To make additional configuration of Cnet Ver. 2.0 available, Frame Editor also shall be of Ver. 2.0. Since Frame
Editor Ver. 2.0 has been designed to keep compliance with the established program, the service for the former
versions of modules is allowed. However, the added functions in this user’s manual are available only for Cnet Ver.
2.0. Select Help in the upper menu of Frame Editor to check the version. The screen below shows Frame Editor
information of Ver. 2.0.
1.2.5 Added function of Version2.0
This user’s manual describes the additional functions via module Ver.-Up and the established functions of Cnet
functions together. The additional functions provided only in Cnet Ver. 2.0 are so displayed as with Ver.2.0, and the
functions displayed with the mark above are available not in the former versions but only in Ver. 2.0.

Chapter 2 Definition of terms
2-1
Chapter 2 Definition of terms
This chapter describes the communication terms used in this user’s manual.
1) Communication type
A) Simplex
This is the communication type that data is transferred in constant direction. Information can not be
transferred in the reverse direction.
B) Half-Duplex
Data is transferred in two-way with one cable if time interval provided, though it can’t be transferred
simultaneously.
C) Full-Duplex
Data is simultaneously transferred and received in two-way with two cables.
2) Transmission type
This is divided into the following 2 types in consideration of the speed, safety and economy on transmission in
binary (bit composed of 0 and 1).
A) Serial transmission
This type transmits bit by bit via 1 cable. The speed of transmission is slow, but the cost of installation is low
and the software is simplified.
RS-232C, RS-422 and RS-485 are the examples.
Trans. Recv.

Chapter 2 Definition of terms
2-2
B) Parallel transmission
This type is used in printer, etc., which transmits data in unit of 1 byte, so the speed is high and the accuracy
of data is reliable. However, the longer the transmission distance is, the higher the cost of installation is
geometrically.
3) Asynchronous communication
This communication type transmits characters one by one synchronously in serial transmission. At this time,
synchronous signal (Clock, etc.) is not transmitted. Character code is transmitted with a start bit attached to the
head of 1 character, and it is finished with a stop bit attached to the tail.
* For transmitting KOREA
Trans. Recv.
Transmission
direction Æ
Stop Bit Parity Bit Data Bit Start Bit

Chapter 2 Definition of terms
2-3
4) Protocol
This is communication rule established in relation between the transmission side and the receiving side of
information in order to send and accept information between two computers/terminals or more without error,
effectively, and reliably. In general, this specifies call establishment, connection, structure of message exchange
form, re-transmission of error message, procedure of line inversion, and character synchronization between
terminals, etc.
5) BPS(Bits Per Second) and CPS(Characters Per Second)
BPS is a unit of transfer rate that represents how many bits are transferred per second. CPS is the number of the
characters transferring for a second. Generally, one character is 1Byte (8Bits), so CPS is the number of byte
which can be transferred per second.
6) Node
Node is a term that means the connected nodes of the data in the network tree structure, generally network is
composed of a great number of nodes, and is also expressed as the station number.
7) Packet
Packet, a compound term of package and bucket used for packet exchange type to send information as divided
in a unit of packet, separates transfer data into the defined length and adds a header that presents the opposite
addresses (station No., etc.) into it.
8) Port
Port is meant to be the part of the data process devices which sends or receives the data from a remote control
terminal in data communications, but in Cnet serial communication is meant to be the RS-232C or RS-422 port.
9) RS-232C
RS-232C is the interface to link a modem with a terminal and to link a modem with a computer, and is also the
serial communications specification established by EIA according to the recommendations of the CCITT. This is
also used to link the null modem directly as well as the modem linkage. The disadvantage is that the transfer
length is short and only 1 : 1 communication is available, and the specifications which recover this disadvantage
are RS-422 and RS-485.
10) RS-422/RS-485
As one of the serial transmission specifications, its transfer length is long and multi (1 : N) connections are
available compared to RS-232C. The difference of these two specifications is that RS-422 uses 4 signals of
TX(+), TX(-), RX(+) and RX(-), while RS-485 has 2 signals of (+) & (-), where data is sent and received through

Chapter 2 Definition of terms
2-4
the same signal line. Accordingly, RS-422 executes the full-duplex type of communication and RS-485 executes
the half-duplex type of communication.
11) Half Duplex Communication
Two-way communication is available, however simultaneous communication of transmission & receiving isn’t
available. This communication type is applied to RS-485 for instance. It is used a lot for multi-drop communication
type which communicates via one signal line by several stations. Half Duplex Communication results from the
transmission characteristic performed by stations one by one not allowing simultaneous transmission by multi
stations due to the data damage of data impact caused by the simultaneous multi-transmission of the stations.
The figure below shows an example of structure based on Half Duplex Communication. Each station in
communication with the terminal as linked with each other can send or receive data via one line so to execute
communication with all stations, where multi-master is advantageously available.
]
12) Full Duplex Communication
Two way-communication of simultaneous transmission & receiving is available. This communication type is
applied to RS-232C & RS-422.
Master station
Master station Master station Master station Master station
Master station
Slave station Slave station
Slave station
Slave station

Chapter 2 Definition of terms
2-5
Since the transmission line is separated from the receiving line, simultaneous transmission & receiving is
available without data impact, so called as Full Duplex Communication. The figure shows an example of structure
based on RS-422 of Full Duplex Communication. Since transmission terminal of the master station and receiving
terminals of the slave stations are connected to one line, and transmission terminals of the slave stations are
linked with receiving terminal of the master station, the communication between slave stations is unavailable with
the restricted function of multi-master.
13) BCC(Block Check Character)
As serial transmission may have signals distorted due to noise in transmission line, BCC is used as data to help
receiving side to check the signals if normal or distorted and to detect errors in signals as compared with the
received BCC after calculating BCC by receiving side itself using the data input to the front terminal of BCC.
14) GMWIN function
This is the function to remotely perform programming, reading/writing user’s program, debugging, and monitor
ing, etc. without moving the physical connection of GMWIN in the network system where PLC is connected to
Cnet I/F module. Especially, it is convenient to control a remote PLC via modem.
* GMWIN : Programming software of GLOFA PLC for Windows.
15) Frame
Frame is composed of transmitted and received data as in a specified form in data communication including
additional information of segment [station No., commands, parameter by command], control characters [ ENQ,
Imaginaryconnection
Relay station
Aerial circuit Aerial circuit
Dial-up
Modem Dial-up
Modem
RS-232C Cable
RS-232C

Chapter 2 Definition of terms
2-6
ACK, EOT, ETX ] for synchronization, parity for detecting error, and BCC. The structure of frame used for serial
communication of Cnet is as follows.
[Structure of general TX / RX frame]
(1) Header : ASCII value indicating frame start.
(2) Tail : ASCII value indicating frame end.
(3) BCC (Block Check Character) : BCC as of check data for TX / RX frame is to inspect reliability of data
with such various methods as ADD, OR, EXR and MULTIPLY.
Required frame
Segment Tail
Segment Tail
ENQ
Parameter by command
EOT
BCC
ACK
E
T
X
BCC
Header
Header
Command
Station
No.
Station
No. Command Result
treated