gsk GSK 25i PLC User Manual

This user manual describes all items concerning the operation of

this CNC system in detail. However, it is impossible to give particular

descriptions for all unnecessary or unallowable operations due to length

limitation and products application conditions；therefore, the items not

presented herein should be considered impractical or unallowable.

for any organization or individual to publish or reprint this manual. GSK CNC

Equipment Co., Ltd. reserves the right to ascertain their legal liability.

GSK 25i Milling CNC System User Manual

Preface

Your Excellency,

We are honored by your purchase of this GSK 25i Milling Machining

Center CNC System made by GSK CNC Equipment Co., Ltd.

This book is “PLC Programming and Connection” section of the User

Manual Volume Ⅱ.

Special caution:

The power supply fixed on/in the cabinet is exclusively used for the

CNC system made by GSK.

It can't be applied to other purposes, or else it may cause serious

danger.

Volume Ⅱ PLC Programming and Connection

Warning and Precaution

Accident may occur by improper connection and operation！This system can

only be operated by authorized and qualified personnel.

Please read this manual carefully before operation！

Please read this manual and a manual from machine tool builder carefully before

installation, programming and operation, and strictly observe the requirements.

This manual includes the precautions for protecting user and machine tool. The

precautions are classified into Warning and Caution according to their bearing on safety,

and supplementary information is described as Note. Read these Warnings, Caution and

Note carefully before operation.

Warning

User may be injured or equipment be damaged if operations instructions and

procedures are not observed.

Caution

Equipment may be damaged if operation instructions or procedures are not

observed.

Note

It is used to indicate the supplementary information other than Warning and Caution.

III

GSK 25i Milling CNC System User Manual

Announcement

● This manual describes various possibilities as much as possible.

However, operations allowable or unallowable cannot be explained

one by one due to so many possibilities that may involve with, so the

contents that are not specially stated in this manual shall be

considered as unallowable.

Caution

● Functions, technical indexes (such as precision and speed) described

in this user manual are only for this System. Actual function

deployment and technical performance of a machine tool with this

CNC system are determined by machine tool builder’s design, so

functions and technical indexes are subject to the user manual from

machine tool builder.

● Refer to the user manual from machine tool builder for function and

meaning of keys on control panel.

Volume Ⅱ PLC Programming and Connection

Precautions

■ Delivery and storage

● Packing box over 6 layers in pile is unallowed.

● Never climb the packing box, neither stand on it, nor place heavy objects on it.

● Do not move or drag the products by the cables connected to it.

● Forbid collision or scratch to the panel and display screen.

● Avoid dampness, insolation and drenching.

■ Open-package inspection

● Confirm that the products are the required ones.

● Check that the products are not damaged in delivery.

● Confirm that the parts in packing box are in accordance with the order.

● Contact us in time if any inconsistence, shortage or damage is found.

■ Connection

● Only qualified personnel can connect the System or check the connection.

● The System must be earthed, and the earth resistance must be less than 0.1Ω.

The earth wire cannot be replaced by zero wire.

● The connection must be correct and firm to avoid any fault or unexpected

consequence.

● Connect with surge diode in the specified direction to avoid damage to the

System.

● Switch off power supply before plugging out or opening electric cabinet.

■ Troubleshooting

● Only competent personnel are supposed to inspect the System or machine.

● Switch off power supply before troubleshooting or changing components.

● Check for fault when short circuit or overload occurs. Restart can only be done

after troubleshooting.

● Frequent switching on/off of the power is forbidden, and the interval time should

be at least 1 min.

GSK 25i Milling CNC System User Manual

Safety Responsibility

Manufacturer’s Responsibility

——Be responsible for the danger which should be eliminated and/or controlled on

design and configuration of the provided CNC systems and accessories.

——Be responsible for the safety of the provided CNC systems and accessories.

——Be responsible for the provided information and advice for the users.

User’s Responsibility

——Be trained with the safety operation of CNC system and familiar with the safety

operation procedures.

——Be responsible for the dangers caused by adding, changing or altering to the

original CNC systems and the accessories.

——Be responsible for the failure to observe the provisions for operation, adjustment,

maintenance, installation and storage in the manual.

All specifications and designs herein are subject to change without

further notice.

This manual is reserved by end user.

We are full of heartfelt gratitude to you for supporting us in the use of

GSK’s products.

Volume Ⅱ PLC Programming and Connection

Contents

Ⅰ PLC PROGRAMMING ...................................................................................................................1

PART 1 PROGRAMMING .............................................................................................................2

1 Sequence Program Creating Process ...................................................................................3

1.1 GSK25i PLC specifications.....................................................................................................3

1.2 What ’s a Sequence Program ................................................................................................3

1.3 Assignment of interface specifications（step 1）...............................................................4

1.4 Establishment of ladder diagram（step 2） ........................................................................4

1.5 Sequence program debugging（step 3） ............................................................................4

2 Sequence Program..................................................................................................................5

2.1 Execution process of sequence program .............................................................................5

2.2 Repetitive cycle ........................................................................................................................6

2.3 Priority of execution(1

level, and 2

2.4 Sequence program structure..................................................................................................7

2.5 Processing I/O (input/output) signals ..................................................................................8

2.6 Interlocking ...........................................................................................................................11

3 Address ...............................................................................................................................12

3.1 Machine →PLC address（X）............................................................................................13

3.2 PLC→machine side address（Y） .....................................................................................15

3.3 PLC→CNC address（G）....................................................................................................16

3.4 CNC→PLC address（F） ....................................................................................................17

3.5 Internal relay address（R） .................................................................................................17

3.6 Address of keep relay（K） .................................................................................................18

3.7 Addresses(A) for message selection ..................................................................................18

3.8 Address of counter（C） ......................................................................................................19

3.9 Address of timer （T）.........................................................................................................19

3.10 Address（D）of data table.................................................................................................20

3.11 Label address（L） .............................................................................................................20

3.12 Subprogram numbers（P） ...............................................................................................20

4 PLC Basic Instruction ...........................................................................................................21

4.1 LD, LDI, OUT, OUTI command ............................................................................................22

4.2 AND, ANI command...............................................................................................................22

4.3 OR, ORI command ................................................................................................................23

4.4 ORB command .......................................................................................................................23

4.5 ANB command ....................................................................................................................... 24

5 PLC Functional Instructions.................................................................................................25

5.1 END1

5.2 END2（2

（1

level sequence program end） ........................................................................26

level sequence program end） .......................................................................27

5.3 TMR（Timer）........................................................................................................................27

5.4 TMRB（fixed timer）.............................................................................................................28

5.5 TMRC（timer）......................................................................................................................29

5.6 DECB（binary decode） ......................................................................................................31

5.7 CTR（counter）.....................................................................................................................32

level).........................................................................6

VII

GSK 25i Milling CNC System User Manual

5.8 CTRC（counter） ................................................................................................................. 34

5.9 ROTB（binary rotation control） ........................................................................................ 36

5.10 CODB（binary code conversion） ................................................................................... 38

5.11 MOVE（logical product transfer）.................................................................................... 40

5.12 MOVOR（data transfer after logical sum） .................................................................... 41

5.13 MOVB （transfer of 1 byte）............................................................................................ 42

5.14 MOVW （transfer of 2 bytes）......................................................................................... 43

5.15 MOVN（transfer of an arbitrary number of bytes）....................................................... 43

5.16 PARI（parity check） ......................................................................................................... 44

5.17 DCNVB（extended data conversion） ............................................................................ 45

5.18 COMPB（binary compasion）.......................................................................................... 47

5.19 COIN（coincidence check） ............................................................................................. 49

5.20 DSCHB（data search）..................................................................................................... 50

5.21 XMOVB（binary indexed modifier data transfer）......................................................... 51

5.22 ADDB(addition).................................................................................................................... 53

5.23 SUBB（binary subtraction） ............................................................................................. 55

5.24 MULB（binary multiplication） ......................................................................................... 56

5.25 DIVB（binary division） ..................................................................................................... 58

5.26 NUMEB（definition of binary constant）......................................................................... 60

5.27 DIFU（Edge Up detection） ............................................................................................. 61

5.28 DIFD（Edge Down detection）

5.29 SFT（shift register） .......................................................................................................... 63

5.30 EOR（EOR） ...................................................................................................................... 64

5.31 AND（logical and） ............................................................................................................ 66

5.32 OR（logical or）.................................................................................................................. 67

5.33 NOT（logical not） ............................................................................................................. 69

5.34 COM（common line control）........................................................................................... 70

5.35 COME（common line control end） ................................................................................ 71

5.36 JMP（jump）....................................................................................................................... 71

5.37 JMPE（jump end） ............................................................................................................ 73

5.38 CALL（conditional subprogram call） ............................................................................. 73

5.39 CALLU（uncoditional subprogram call） ........................................................................ 74

5.40 JMPB（label jump 1） ....................................................................................................... 75

5.41 JMPC（label jump 2） ....................................................................................................... 76

5.42 LBL（label） ........................................................................................................................ 76

5.43 SP（subprogram） ............................................................................................................. 77

5.44 SPE（end of a subprogram）........................................................................................... 78

6 Ladder Writing Limit...........................................................................................................79

........................................................................................ 62

PART 2 FUNCTION ......................................................................................................................80

1 Preparations for operatoin .............................................................................................81

1.1 Emergency stop ..................................................................................................................... 81

1.2 CNC overtral signal ............................................................................................................... 82

1.3 Alarm signal............................................................................................................................ 83

VIII

1.4 Interlock

................................................................................................................................... 83

Volume Ⅱ PLC Programming and Connection

1.5 Operation mode selection.....................................................................................................84

2 Manual operation...................................................................................................................85

2.1 JOG feed/incremental feed...................................................................................................85

2.2 MPG / Step feed .....................................................................................................................86

3 Reference Point Return.........................................................................................................88

3.1 Manual reference point return ..............................................................................................88

4 Automatic operation..............................................................................................................91

4.1 Cycle start/feed hold ..............................................................................................................91

4.2 reset .........................................................................................................................................94

4.3 Testing a program ..................................................................................................................95

4.4 Optional block skip.................................................................................................................98

4.5 Program restart.......................................................................................................................99

5 Feedrate Control..................................................................................................................101

5.1 Rapid traverse rate ..............................................................................................................101

5.2 Override .................................................................................................................................102

6 Auxiliary Function ...............................................................................................................104

6.1 Miscellaneous function ........................................................................................................104

6.2 Auxiliary function lock ..........................................................................................................109

7 Spindle Speed Function......................................................................................................111

7.1 Spindle speed control mode ............................................................................................... 111

7.2 Spindle speed arrival signal................................................................................................113

7.3 Rigid tapping .........................................................................................................................114

8 Tool function........................................................................................................................115

8.1 T command tool change.........................................................................................................115

9 Programming command .....................................................................................................115

9.1 Custom macro program .........................................................................................................115

Ⅱ CONNECTION ........................................................................................................................... 118

1 GSK25i System Box Interface..........................................................................................121

2 Operation panel interface.................................................................................................122

2.1 Sketch map of machine operation panel interface.............................................................122

2.2 GSK 25i CNC system communication interface XS21......................................................122

2.3 Emergency stop power-on interface ....................................................................................122

3 I/O Interface .......................................................................................................................123

4 Interconnection Graph .....................................................................................................125

5 PC serial communication wire.........................................................................................126

6 MPG Wiring .......................................................................................................................127

7 Operation Panel Signal Line ............................................................................................129

8 Ethernet Communication Connection.............................................................................130

9 Connected with the Spindle Servo ..................................................................................132

10 Connected with the Spindle Converter .........................................................................133

11 Connection Method of Z Brake, System Power-on Control ........................................134

12 I/O Input, Output Signal..................................................................................................135

12.1 Connection method of input signal.....................................................................................135

12.2 Connection method of output signal ..................................................................................136

GSK 25i Milling CNC System User Manual

12.3 Definition of input signal point ............................................................................................ 137

12.4 Definition of output signal point.......................................................................................... 139

APPENDIX ......................................................................................................................................141

1 Signal table(address order)................................................................................................141

2 Contour installation dimension drawing...........................................................................145

Volume Ⅱ PLC Programming and Connection

Ⅰ PLC PROGRAMMING

GSK 25i Milling CNC System User Manual

Part 1 Programming

Volume Ⅱ PLC Programming and Connection

1 Sequence Program Creating Process

1.1 GSK25i PLC specifications

Specification of GSK25i PLC are as follows(see Table 1-1):

Table 1-1

Programming method language Ladder, command table

Mean processing time of basic command 0.5(μs/step)

Specification

Number of ladder level 2

1st level execution period 8ms

Program capacity 12000 steps

Command

Internal relay （R） Data table （D） Meter （C） Timer （T） PLC alarm detection （A） Keep relay （K） Label （L） Subprogram （P）

Machine →PLC(X)

PLC→machine (Y)

CNC→PLC(F)

PLC→CNC(G)

400 bytes （C0 to C399）100PCS

200 bytes （T0 to T199）100PCS

GSK25i PLC

Functional command：44

1100 bytes（R0 to R1099）

1860 bytes （D0 to D1859）

32 bytes(A0 to A31)

32 bytes(K0 to K31)

9999（L1～L9999）

512（P1～P512）

128 bytes（X0 to X127） 128 bytes （Y0 to Y127） 256 bytes （F0 to F255）

256 bytes （G0 to G255）

P：10

1.2 What ’s a Sequence Program

A sequence program is a program for sequence control of machine tools and other systems.

The program is converted into a format to enable CPU execute encoding and arithmetic

processing, and stored into RAM. CPU reads out every instruction stored in the memory at a

high-speed and execute the program by arithmetic operation

The sequence program is written firstly from ladder.

GSK 25i Milling CNC System User Manual

1.3 Assignment of interface specifications（step 1）

After deciding the control object specification, calculate the number of input/output signal points,

create the interface specification.

For input/output interface signals, see Chapter 4.

1.4 Establishment of ladder diagram（step 2）

Express the control operations decided by 25i ladder diagram. For the timer, meter, etc, which

cannot be expressed with the functional instructions.

The edited ladder should be converted into the corresponding PLC instruction i.e. instruction list

to store.

1.5 Sequence program debugging（step 3）

The sequence program can be debugged in two ways:

1） Debug by simulator

Instead of the machine, connect a simulator (consisting of lamps and switches). Switch

ON/OFF stands for the input signal state of machine, lamp ON/OFF for the output signal state.

2） Actual operation debugging

Debug sequence program through operating the machine. Do measures against the

unexpected affairs before debugging.

Volume Ⅱ PLC Programming and Connection

2 Sequence Program

Since PLC sequence control handled by software and operates on principle difference from a

general relay circuit, the sequence control method must be fully understood in order to design PLC

sequence program.

2.1 Execution process of sequence program

In general relay control circuit, each relay operates at approximately the same time, in the figure

below for example, when relay A operate, the relay D and E operate at approximately the same

time(when contacts B and C are off)., In PLC sequence control, each relay of circuit operates

sequentially. When relay A operates, relay D operates, then relay E(see Fig.2-1). Thus each relay

operates in sequence which can be written as a ladder diagram. (Programmed sequence).

Fig. 2-1(a)

Fig.2.1(b) and (c) illustrate operations varying from the relay circuit to PLC programs.

Fig. 2-1(b)

Fig.2-1(c)

A C

GSK 25i Milling CNC System User Manual

(1) Relay circuit

In Fig. 2.1(b) and (c), the operations are the same. Turning on A turns on B and C. Turning on C

turns off B.(2) PLC program

In Fig.2.1(b), as in the relay circuit, turning on A turns on B and C, and after one cycle of the PLC

sequence, turns off B. But in Fig.2.1(c), turning on A turns on C, but does not turn on

2.2 Repetitive cycle

The PLC executes the ladder diagram from the beginning to the end . When the ladder diagram

ends, the program starts over from the beginning. This is called repetitive operation.

The execution time from the beginning to the end of the ladder diagram is called the sequence

processing time. The shorter the process time is, the better the signal response becomes.

2.3 Priority of execution(1

GSK25i PLC consists of two parts: 1st level sequence part, 2nd level sequence part. They have

different execution period.

The 1

level sequence part operates every 8 ms, which can deal with the short pulse signal with

level, and 2nd level)

high-speed response).

The 2

level sequence part operates every 8*n ms. Here N is a dividing number for the 2nd level

sequence part. The 2nd level sequence part is divided into V part, and every part is executed every

8ms.

level

sequence part

END1

Specifies the end of the 1st level sequence part

Division 1

Division 2

level

sequence program

END2

Division n

Fig. 2-2

Specifies the end of the

2nd level sequence part

Volume Ⅱ PLC Programming and Connection

GSK 25i PLC is solely executed in PLC-AVR single chip, and the first 1ms of each 8ms is the

communication time of CNC reading or writing PLC data. The fifth 1ms is the time that the PLC receives the system control signal（F, X ）and uploads the control result data（G, Y p ar am et er ）to the external I/O interface（X, Y）, except for the time responding the interruption to exchange the data, the

PLC executes the ladder operation at the rest time.

1stlevel

level

CNC use

8 ms

3 ms

Division 1

3 ms

Division 2

8 ms

3 ms

Division n

Fig. 2-3

After the last 2nd level sequence part (division n) is executed, the sequence program is executed

again from the beginning. Thus, when the dividing number is n, the cycle of execution is 8*n ms. The

level sequence operates every 8ms, and the 2nd level sequence every 8*n ms. If the steps of the

level sequence is increased, the steps of the 2nd level sequence operating within 4ms becomes

less, thereby increasing the dividing number and making the processing time longer. Therefore, it is

desirable to program so as to reduce the 1

level sequence to a minimum.

2.4 Sequence program structure

With the conventional PLC, a ladder program is described sequentially. By employing a ladder

language that allows structured programming, the following benefits are derived:

1. A program can be understood and developed easily

2. A program error can be found easily.

3.When an operation error occurs, the cause can be found easily.

Three major structured programming capabilities are supported:

1） Subprogram

A subprogram can consist of a ladder sequence as the processing unit.

Fig. 2-4

GSK 25i Milling CNC System User Manual

2) Nesting

The Ladder subprograms can call the other ladder subprogram to execute the job.

Main program

Subprogram 2 Subprogram 1

Job A

Job A1

Job A11

Job B

Job An

Job A12

Fig. 2-5

3) Conditional branch

The main program loops and checks whether conditions are satisfied. If a condition is satisfied, the

corresponding subprogram is executed. If the condition is not satisfied, the subprogram is jumpped.

Main program

State 1

Subprogram 1

Process 1

Process 11

State 2

Process 2

Process 12

Fig. 2-6

Process 13

2.5 Processing I/O (input/output) signals

Input signal processing:

CNC

8ms

CNC—PLC

Input signals from

machine tool

IO interface

PLC

2nd sequence part

starting memory

2nd sequence part

input signal memory

Fig. 2-7

1st level

sequence

part

2nd level

sequence

part

Output signal processing:

CNC

CNC—PLC Share memory

output memory from

machine tool

8ms

IO interface

2.5.1 Input signal processing

Volume Ⅱ PLC Programming and Connection

PLC

Fig. 2-8

1st level

sequence part

level

sequence part

（1）Input memory of NC

The input signals from NC are loaded in memory of NC and are transferred to the PLC at

intervals of 8ms. Since the 1

level sequence part directly refer to these signal and process

operations.

（2）Input signal memory to machine tool

The input signal memory stores signals transferred from the machine tool at intervals of 8ms

period. Since the 1

（3）2

level input signal memory

level sequence part directly refer to these signal and process operations.

The 2nd level input signal memory is also called as 2nd level synchronous input signal memory.

The stored signals are processed by the 2

synchronizes with that of 2

level sequence part.

Input memory Signals from NC and machine tool are transferred to the 2

memory only at the beginning of execution of the 2

level synchronous input signal memory does not change from the beginning to end of the

execution of the 2

level sequence part.

level sequence part. State of the signals set this memory

level input signal

level sequence part. Therefore, the state of the

2.5.2 Output signal processing

（1）NC output memory

The output signals are transferred form the PLC to the NC output memory at intervals of 8ms.

（2）Output signals to machine tool

Output signal to the machine tool from PLC output signal memory to the machine tool at intervals

of 8ms.

GSK 25i Milling CNC System User Manual

Note:

The state of the NC input memory, NC output memory, input signals from machine, input/output

memory signals to machine can be checked by using the PC self-diagnosis function. The

self-diagnosis number specified is the address number used by the sequence program.

2.5.3 Synchronous processing the short pulse signal

1st program can process the short pulse signal. When the short pulse signal change is less than

8ms, i.e.when the system executes the 1

followings.

program, the input signal state can change to cause the

Fig. 2-9

When A＝0 and B1＝1，A becomes 1, at the moment, the system executes the next

ladder statement to make B2＝1. so, B1 and B2 become 1.

END1

Fig. 2-10

When the medium relay R synchronously processes the signal A, B1, B2 are not 1 at the same

time.

Volume Ⅱ PLC Programming and Connection

2.5.4 Difference state of signals between 1st level and 2nd level

The state of the same input signal may be different in the 1st level and 2nd level sequences. That

is, at 1

performed using the 2

sequence execution at the worst, compared with a 1

This must be kept in mind when writing the sequence program.

level, processing is performed using input signal memory and at 2nd level, processing is

level synchronous input signal memory. Therefore, it is possible for a 2nd level

level input signal.

division of 2nd

level sequence part

Fig. 2-11

When the processing is 1st 8ms, A=1, and B=1 after 1st sequence part is executed. At the same

time, 2nd sequence part is started to execute A=1 is stored to the 2nd sequence part and the 1st

division of 2nd sequence part is executed.

When the processing is 2nd 8ms, A=0, and B=0 after 1st sequence part is executed. And then

2nd division of 2nd sequence part is executed, at this time, A is still 1. So C=1.

So, B and C are different.

2.6 Interlocking

Interlocking is externally important in sequence control safety.

Interlocking with the sequence program is necessary. However, interlocking with the end of the

electric circuit in the machine tool magnetic cabinet must not be forgotten. Even though logically

interlocked with the sequence program (software), the interlock will not work when trouble occurs in

the hardware used to execute the sequence program. Therefore, always provide an interlock inside

the machine tool magnetic cabinet panel to ensure operator safety and to protect the machine from

damage.

GSK 25i Milling CNC System User Manual

3 Address

An address shows a signal location. Addresses include input/output signals with respect to the

machine, the input/output signals with respect to the CNC, the internal relays, the meters, the keep

relays, and data table. Each address consists of an address number and a bit number. Its serial

number regulations are as follows:

Address regulations:

The address comprises the address type, address number and the bit number in the format as

shown below:

Type: including X, Y, R, F, G K, A, D ,C, T

Address number: decimal serial number stands for one byte.

Bit number: octal serial number, 0～7 stands for 0～7 bit of byte of front address number

GSK25i PLC address type is as follows Fig.3-1：

Emergency stop, jump and other

high-speed signals

Machine to PLC

Input signal

PLC to machine

Output signal

Nesting

PLC

Fig. 3-1

PLC to NC

NC to PLC

25i

CNC

Volume Ⅱ PLC Programming and Connection

Table 3-1

Address Address explanation Address range

X machine→PLC(128 bytes)

Y PLC→machine(128 bytes)

F CNC→PLC(256 bytes)

G PLC→CNC(256 bytes)

R Internal relay(1100 bytes)

D Data register(1860 bytes)

C Counter (400 bytes)

T Timer (200 bytes)

A Timer preset data register (32 bytes)

Keep relay（32 bytes） K0～K31

3.1 Machine →PLC address（X）

X0～X127 Y0～Y127

F0～F255 G0～G255 R0～R1099 D0～D1859

C0～C 399

T0～T199

A0～A31

X addresses of GSK25i PLC are divided into two:

1. X addresses are assigned to IO input interface.

2. X addresses are assigned to the input press keys on MDI panel.

3. X addresses are assigned to other external interfaces, such as the spindle, MPG control signal

input.

3.1.1 Assignment of IO module X address

The addresses are from X9 to X119. Its type is INT8U, 111 types.

The signal specification of X addresses can be customized by customer according to the actual

operation. X addresses are used to connect the machine tool with the ladder. For the initial definition

of input address, see Chapter Four Connection.

3.1.2 Assignment of MDI panel X address

The addresses are from X0 to X8, 9 bytes. They correspond to the press keys on MDI panel.

The corresponding relationship between them and the press keys on the standard panel is as Fig.

3-2:

GSK 25i Milling CNC System User Manual

Table 3-2

INPUT KEY ON

OPERATION PANE L

Auto mode X0.0 -Z X3.5

Edit mode X0.1 -4 X3.6

MDI mode X0.2 -5 X3.7

Manual mode X0.3 Spindle CW X4.0

MPG mode X0.4 Spindle stop X4.1

Zero mode X0.5 Spindle CCW X4.2

DNC mode X0.6 Spindle orientation X4.3

USER1 X0.7

Single block X1.0

Jump X1.1

Machine lock X1.2

Auxiliary lock X1.3

+4 X1.4

+Z X1.5

-Y X1.6 Tool magazine infeed X5.3

+5 X1.7 Tool retraction X5.4

Dry run X2.0 Tool change manipulator X5.5

Overtravel release X2.1 Tool magazine CW X5.6

Optional stop X2.2 Tool magazine zero X5.7

Program restart X2.3 Clamp/release X6.0

+X X2.4 USR2 X6.1

Rapid X2.5 USR3 X6.2

Step X2.6 USR4 X6.3

-X X2.7 Feed hold X6.4

Cooling X3.0 Cycle start X6.5

Lubricating X3.1 Tool magazine CCW X6.6

Chip removal

Working light

+Y X3.4 Emergency stop X8.4

PLC

ADDRESS

X3.2 Feedrate override, up to

X3.3 Spindle override, up to

INPUT KEY ON

OPERATION PANE L

F0／0.001

25%／0.01

50%／0.1

100%／1

24-gear(no output light)

16-gear（no output light）

PLC

ADDRESS

X4.4

X4.5

X4.6

X4.7

X7.0-X7.4

X8.0-X8.3

Volume Ⅱ PLC Programming and Connection

3.1.3 MPG signal input X address

Table 3-3

MPG signal input

HDC0_STP （MPG emergency stop signal） HDC0_MX100（MPG federate override） HDC0_MX10 （MPG federate override） HDC0_MX1 （MPG federate override）

HDC0_5 （5th axis）

PLC address

X121.0

X120.0

X120.1

X120.2

X120.3

HDC0_4 （4th axis） HDC0_Z （Z axis） HDC0_Y （Y axis） HDC0_X （X axis）

X120.4

X120.5

X120.6

X120.7

3.2 PLC→machine side address（Y）

Y addresses of GSK25i PLC are divided into three:

1. Y addresses are assigned to IO input interface.

2. Y addresses are assigned to the indicators on MDI panel.

3. Y addresses are assigned to the indicators on MPG.

3.2.1 Y address of I/O output interface

The addresses are from Y8 to Y119. Its type is INT8U, 112 types.

The signal specification of Y addresses can be customized by customer according to the actual

operation. Y addresses are used to connect the machine tool with the ladder. For the initial definition

of input address, see Chapter Four Connection.

3.2.2 Assignment of IO module Y address

The addresses are from Y0 to Y7, 8 bytes. They correspond to the indicators on MDI panel, and

their signal definitions cannot be changed by user.

Addresses and indicators are as follows Table.3-4:

GSK 25i Milling CNC System User Manual

Table 3-4

OUTPUT KEY ON

OPERATION PANE L

PLC

ADDRESS

OUTPUT KEY ON

OPERATION PANE L

PLC

ADDRESS

Auto key indicator Y0.0 -Z key indicator Y3.5

Edit key indicator Y0.1 -4 key indicator Y3.6

MDI key indicator Y0.2 -5 key indicator Y3.7

Manual key indicator Y0.3 Spindle CW key indicator Y4.0

MPG key indicator Y0.4 Spindle stop key indicator Y4.1

Zero key indicator Y0.5 Spindle CCW key indicator Y4.2

DNC key indicaor Y0.6 Spindle orientation key indicator Y4.3

USER1 key indicaor Y0.7

Single block key indicaor Y1.0

Jump key indicator Y1.1

Machine lock indicator Y1.2

F0／0.001 key indicator

25%／0.01 key indicator

50%／0.1 key indicator

100%／1 key indicator

Y4.4

Y4.5

Y4.6

Y4.7

Auxiliary lock indicator Y1.3 Tool magazine infeed key indicator Y5.3

+4 key indicator Y1.4 Tool retraction key indicator Y5.4

+Z key indicator Y1.5 Tool change key indicator Y5.5

-Y key indicator Y1.6 Tool magazine CW key indicator Y5.6

+5 key indicator Y1.7 Tool magazine zero key indicator Y5.7

Dry run key indicator Y2.0 Clamp/release tool key indicator Y6.0

Overtravel release key indicator Y2.1 USR2 key indicator Y6.1

Optional stop key indicator Y2.2 USR3 key indicator Y6.2

Program restart key indicator Y2.3 USR4 key indicator Y6.3

+X key indicator Y2.4 Feed hold key indicator Y6.4

Rapid key indicator Y2.5 Cycle start key indicator Y6.5

Step key indicator Y2.6 Tool magazine CCW key indicator Y6.6

-X key indicator Y2.7 X zero return indicator Y7.0

Cooling key indicator Y3.0 Y zero return indicator Y7.1

Lubricating key indicator Y3.1 Z zero return indicator Y7.2

Chip removal key indicator Y3.2 4

Working light key indicator Y3.3 5

zero return indicator Y7.3

zero return indicator Y7.4

+Y key indicator Y3.4 System alarms Y7.6

3.2.3 MPG signal light output

MPG signal light output

Y120.0

3.3 PLC→CNC address（G）

Addresses are from G0 to G255. Type: INT8U,256 bytes. G addresses are the signals from PLC

to NC, and these signals have been defined in designing the CNC system and cannot be modified.

Volume Ⅱ PLC Programming and Connection

The concrete is referred to Appendix 1.

3.4 CNC→PLC address（F）

A ddresses are from F0 to F255. Type: INT8U,256 bytes. F addresses are the signals from NC to

PLC, and these signals have been defined in designing the CNC system and cannot be modified. The

concrete is referred to Appendix 1.

3.5 Internal relay address（R）

The address area is cleared to zero when the power is turned on.

Type: INT8U, with 1100 bytes.

Fig. 3-2

Note: the addresses from R1000 are used by PLC. For example: ADDB, SUBB, COMB functional command

operation result are output to the register:

#7 #6 #5 #4 #3 #2 #1 #0

R1000 Overflow Negative Zero

Fig. 3-3

GSK 25i Milling CNC System User Manual

3.6 Address of keep relay（K）

The area is used for the keep relays and PLC parameters. Since this area is nonvolatile, the

content of the memory do not disappear even when the power is turned off.

Type: INT8U, with 32 bytes

Fig. 3-4

3.7 Addresses(A) for message selection

The address area is cleared to zero when the power is turned on.

Type: INT8U, with 32 bytes.

Fig. 3-5

Volume Ⅱ PLC Programming and Connection

3.8 Address of counter（C）

The area is used as storing current counting value in meter.

Type: 400 bytes.

C1～C100: count range: 0～65535, can set increase/reducing count, and the counting value

does not disappear even when the power is turned off.

3.9 Address of timer （T）

Type: 200 bytes.

T1～T100，The timing value does not disappear even when the system is turned off.

Fig. 3-6

GSK 25i Milling CNC System User Manual

Fig. 3-7

3.10 Address（D）of data table

Each data register has 8-bit, two continuous data registers can store 16-bit data, four continuous

data registers can store 32-bit data.

The content of the memory do not disappear even when the power is turned off.

Number of data table：D0～D1859，1860 bytes.

Fig. 3-8

3.11 Label address（L）

Label addresses are used to specify jump destination labels and LBL labels in JMPB instructions.

Range: L0～L9999

3.12 Subprogram numbers（P）

Subprogram numbers are used to specify jump destination subprogram labels and SP instruction

subprogram labels in CALL instruction. Range: P0～P511.

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