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NX70/NX700 Serial Communications Unit (SCU)
User Manual
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  • Page 1 ( DataSheet : www.DataSheet4U.com ) NX70/NX700 Serial Communications Unit (SCU) User Manual www.DataSheet4U.com...
  • Page 2 Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment. Because of these differences, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.
  • Page 3: Table Of Contents

    Contents 1. Specifications and Components ......... 9 SCU Features ....................9 System Configuration................... 10 Specifications ....................11 Unit Diagram ....................12 Operation Status Display and Functions ............ 13 DIP Switch Settings ..................14 2. Wiring................ 17 Wiring ......................17 3. Operations and Programming Examples....19 Basic Operations ...................
  • Page 5 Safety Instructions Please read this manual and the related documentation thoroughly and familiarize yourself with product information, safety instructions and other directions before installing, operating, performing inspection and preventive maintenance. Make sure to follow the directions correctly to ensure normal operation of the product and your safety.
  • Page 6 Installation Environment for SCU (Serial Communication Unit) Do not install your analog conversion modules if any of ATTENTION the following conditions are present: • Ambient temperature outside the range of 0 to 55 °C (32 to 131 °F). • Direct sunlight. •...
  • Page 7 Preventing SCU Module Malfunctions ATTENTION • Be sure to power off the PLC system before installing or removing an SCU module. • Ensure that the SCU module is secured onto the backplane before operating it. • Be cautious of metal chips when wiring for the SCU module.
  • Page 9: Specifications And Components

    Specifications and Components Exchange data with RS232C or RS485 communication devices, such as barcode reader (RS232C) and network inverter (RS458). ASCII and HEX (Binary) data transfer is enabled with ladder program. (SCU unit = the existing features of SDU unit + 485 communication) Read data with the advanced instruction, READ NX70 PCL SCU Unit NX700 PCL SCU Unit...
  • Page 10: System Configuration

    6. Both ASCII and HEX (binary) can be used as transmission code. 7. End code can be configured freely with PLC ladder instructions. In addition to this Manual, please refer to System Manual and Programming NOTE Manual for the PLC when using SCU. System Configuration Using RS232C Communication Barcode Reader...
  • Page 11: Specifications

    Specifications General Specifications Item Specifications Operating 0 °C to +55 °C (32 °F to 131 °F) Temperature -25 °C to +70 °C (-13 °F to 158 °F) Storage Operating 30 to 85% RH (Non-condensing) Humidity Storage 30 to 85% RH (Non-condensing) Withstand voltage 500 V ac for 1 minute between I/O terminal (dc) and frame ground (power unit) 100 MΩ...
  • Page 12: Unit Diagram

    Unit Diagram Front View NX700 SCU (NX-SCU) NX70 SCU (NX70-SCU) Operation status display Reset switch Forced reset on the SCU. RS-232C/485 Interface (CH1) RS-232C/485 Interface (CH1) Inside View NX700 SCU (NX-SCU) 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 DSW1 DSW2 DSW3...
  • Page 13: Operation Status Display And Functions

    Operation Status Display and Functions SCU operation and communication status is displayed on the LED on the top of the front panel. SCU front display window NX-SCU NX70-SCU ALARM ALARM ERR1 ERR2 ERR1 ERR2 NX700 SCU NX70 SCU (NX-SCU) (NX70-SCU) Implications LED items Function...
  • Page 14: Dip Switch Settings

    DIP Switch Settings CH1 Setting DIP Switch is located inside the SCU. CH1 setting Start Data Start Data Parity Parity Control Control code length code setting length setting code code Stop Stop Parity Baud- Parity Baud- para para Check Rate code code Check...
  • Page 15 CH2 Setting CH2 Setting Start Data Start Parity Data Parity Control Control code length code length setting setting code code Stop Stop Parity Baud- Parity Baud- para para Check Rate code code Check Rate -meter -meter DSW1 DSW2 DSW3 Bit location Function 38400 Bps 19200 Bps...
  • Page 16 EXAMPLE (DSW Settings) CH1 setting CH2 setting Transmission speed: 9600 bps Transmission speed: 9600 bps Data length: 8 bit Data length: 8 bit Parity Check: Valid Parity Check : Valid Parity Bit: Odd Parity Bit: Odd Stop Bit: 1 Bit Stop Bit: 1 Bit Control signal: Not applicable Control signal: Not used...
  • Page 17: Wiring

    Wiring Wiring RS232C/RS485 INTERFACE SCU Connection Signal Direction PIN NO Signal Name Mnemonic External device FRAME GROUND SEND DATA RECEIVE DATA Connector (9P) SIGNAL GROUND 485 TRANSIVER- 485- 485 TRANSIVER+ 485+ POWER External device referred above means a variety of RS232 ●...
  • Page 18 RS232 Wiring Diagram 3-wire method without flow control (RS232 device - 9 pin) SCU (9P) RS-232 device (9P) PIN NO Mnemonic PIN NO Mnemonic RS485- RS485+ Turn off the DSW1 No. 8 or DSW3 No.4 which are the ATTENTION control codes. 3-wire method without flow control (RS232 device-25 pin) SCU (9P) RS-232 device (25P)
  • Page 19: Operations And Programming Examples

    Operations and Programming Examples Basic Operations You need ladder program to operate the SCU. ● Data exchanges between this unit and CPU unit is transmitted via ● shared memory. Data input from external devices is stored in shared memory only ●...
  • Page 20: Precautions For Scu Operation

    SCU (unit processing) CPU unit (ladder program) Input to the SCU Barcode Shared Memory Memory from external Reader memory devices SCU (unit processing) CPU unit (ladder program) Output from Shared Printer Memory Memory inside the SCU memory Products like ID-X, where I/O (sending/receiving) ATTENTION passes through only one channel, can be operated as half duplex.
  • Page 21 3. The SCU buffer status when resending from the external RS232C (RS485) device is as follows: Start code is not effective Resent frame Previous frame To shared memory of the received frame Start code is effective Resent frame Previous frame To shared memory of the received frame Software reset is available when resetting the SCU in emergency.
  • Page 22: Programming

    Programming Send and receive data with CPU unit ladder program for data READ / WRITE with shared memory in the SCU. Two advanced instructions are used for this: READ (F150) and WRT (F151). In addition, handshake for data READ/WRITE will be determined by contact on/off (two points for each X and Y).
  • Page 23 Using READ in WinFPST (Receiving from external RS232C (RS485) device) When SCU is installed in the first slot of PLC system and external RS232C (RS485) is connected to CH1. R100 Condition for READ X1: For CH1 receiving X1 turns on when normal data is input R101 to the RS232C (RS485) device Condition for READ...
  • Page 24 Using READ in WinGPC (Receiving from external RS232C (RS485) device) When SCU is installed in the first slot of PLC system and external RS232C (RS485) is connected to CH1. R0.1 R1.1 R100 Condition for READ R0.1: For CH1 receiving R0.1 turns on when normal data is input R0.1 R1.1 R101...
  • Page 25 Timing for Sending and Receiving Regardless of the slot location where the SCU is installed, sending and receiving is available. It is controlled by contacts on/off status. Per each CH, 2 points for sending and 2 points for receiving. (Ex) When installed in slot 0 X0 (R0.0) X1 (R0.1) For sending...
  • Page 26 Timing chart for CH2 using Sending Data WRITE from PLC CPU to SCU shared memory, and Y12 (R1.2) on/off setting should be performed by ladder program. Sending X2 (R0.2) starts Read from SCU BUFFER CLEAR Data shared memory to SCU CPU, and send it to the external device Y12 (R1.2) Perform...
  • Page 27 Advanced Instructions Shared Memory instruction - READ in WinFPST S1: Installation slot number of SCU unit. S2: Starting address of shared memory where source data is stored. F150 READ, S1, S2, n, D n: The number of words of source data to read.
  • Page 28 Shared Memory instruction - READ in WinGPC NN5 : Slot no. of SCU mounted. READ (Number, and first I/0 slot start from 0) To = RR1 NR6 : Start address of shared memory of Sz = NR3 SCU (Word address) Fr = NN5:NR6 NR3 : Number of words to be read RR1 : Start word operand of PLC for...
  • Page 29 Shared Memory instruction - WRITE in WinFPST S1: Installation slot number of SCU unit S2: Starting address of the CPU where F151 WRT, S1, S2, n, D the input data is stored. n: The number of words of source data to write to the destination. D: Starting address of SCU shared memory where the data will be stored.
  • Page 30 Data transmission handshake is processed at PLC contacts on/off (two points for each input and output). Shared memory allocation Address 250 words → CH1 sending buffer RS-232C (RS485) device (500 characters) 250 words ← CH1 receiving buffer RS-232C (RS485) device (500 characters) 250 words →...
  • Page 31 I/O Allocation Table The X, Y contact number for I/O is determined by the installation location of the SCU and the number of points of other I/O units. The I/O numbers shown below are applied when the SCU is installed in slot 0 of base backplane.
  • Page 32 Input signal Event N-plus N-series series For CH1 sending R1.0 Y10 (R1.0) turns on when sending data is written to shared memory. Turn off Y10 (R1.0) when X0 (R0.0) is turned on. For CH1 receiving R1.1 Y11 (R1.1) turns on when sending data is read from shared memory. Turn off Y11 (R1.1) when X1 (R0.1) is turned off.
  • Page 33: Nx70, Nx700 Plc Installation Example

    NX70, NX700 PLC Installation Example NX700 PLC system configuration is illustrated below. In this case, the SCU is installed in slot no.4 and I/O units are installed in slot no. 0 to 3. Base backplane (5 slots) 64 points input (X0 to X3F , R0.0 to R3.15) 32 points input (X40 to X5F , R4.0 to R5.15)
  • Page 34: Plc Programming Examples

    PLC Programming Examples Self-Test Program for WinFPST Example of ladder program that performs self-loop at the SCU. Convenient program for self-test of the SCU. Operation description Send data from CH1 and receive it at CH2, and compare the sent and received data.
  • Page 35 CH1 and CH2 PIN wiring diagram For RS-232C communication checking For RS-485 communication checking SCU (CH1) SCU (CH2) SCU (CH1) SCU (CH2) Mnemonic Mnemonic Mnemonic Mnemonic 485- 485- 485+ 485+...
  • Page 36 Sequence Program - ASCII format self-test ladder program (for WinFPST) R9010 Set CH1 to ASCII mode R9010 Set CH2 to ASCII mode [ F0 MV H3131, DT0 ] [ F0 MV HD, DT1 ] [ F0 MV H3232, DT10 ] [ F0 MV HD, DT11 ] R9014 NSTP 1...
  • Page 37 <CH2 sending> Slot NO.3 From PLC CPU DT10, 2 words of data Is stored to SCU shared memory address 501 <CH1 receiving> Slot NO.3 From SCU shared memory address 251, 2 words of data is stored to PLC CPU DT15 and DT16. Data comparison Sent data (end code comparison)
  • Page 38 Sequence program - HEX format self-test ladder program (for WinFPST) <CH1 sending> From slot NO.3 DT0, 1 word of data is stored to shared memory address 1. From slot NO.3 DT100, 2 words of data is stored to SCU shared memory address 1003 transmission length setting.
  • Page 39 <CH2 sending> From slot NO.3 DT0, 1 word of data is stored to SCU shared memory address 501. From slot NO.3 DT102, 2 words of data is stored to SCU shared memory address 1005. (transmission length setting) <CH1 receiving> Slot NO.3 From SCU shared memory address 251, 1 word of data is stored...
  • Page 40 Self-Test Program for WinGPC Example of ladder program that performs self-loop at the SCU. Convenient program for self-test of the SCU. Operation description Send data from CH1 and receive it at CH2, and compare the sent and received data. Send data from CH2 and receive it at CH1, and compare the sent and received data.
  • Page 41 Sequence Program - ASCII format self-test ladder program (for WinGPC) <CH1 sending> R3.0 R4.0 M0.0 R3.0 R4.0 M0.1 Slot NO.3 M0.0 WRITE save to address 1 of shared memory of SCU To = 03 : 1 Sz = 1 1 word of data Fr =W0 from W0 M0.0...
  • Page 42 R3.2 R4.2 M0.4 <CH2 sending> R3.2 R4.2 M0.5 Slot NO.3 M0.4 WRITE save to address 1 of shared To = 03 : 501 memory of SCU Sz = 1 1 word of data Fr =W10 from W10 M0.4 M0.5 R4.2 R4.2 R3.1 R4.1...
  • Page 43 Example of Using a Barcode Reader for WinFPST Connect a barcode reader to SCU CH1. (ex. Barcode reader: (Japan) TOKEN THLS-6300) Read barcode information and store it to PLC. Operation description Read the information at the barcode reader connected to CH1 and store it to from PLC DT100.
  • Page 44 Sequence Program – Ladder program example for using a barcode reader (for WinFPST) Set CH1 to ASCII mode setting <CH1 receiving> Slot NO.0 From SCU shared memory address 251, 20 words of data is stored to PLC CPU from DT100...
  • Page 45 Example of Using a Barcode Reader for WinGPC Connect a barcode reader to SCU CH1. (ex. Barcode reader: (Japan) TOKEN THLS-6300) Read barcode information and store it to PLC. Operation description Read the information at the barcode reader connected to CH1 and store it to from PLC DT100.
  • Page 46 Sequence Program – Ladder program example for using a barcode reader (for WinGPC) R0.1 R1.1 M0.0 <CH1 receiving> R0.1 R1.1 M0.1 M0.0 READ Save to W100 continually To = W100 Sz = 20 20 words of data Fr = 0 : 251 from address 251 of Slot No.
  • Page 47: Troubleshooting

    Troubleshooting...
  • Page 50 R0.4 (R0.9) R0.5 (R0.10) R0.6 (R0.11) R0.7 (R0.12) R0.8 (R0.13) The SCU is mounted in slot 0, and the contact number in ( ) is the contact number of CH2 error indication.
  • Page 51: Product Dimensions And Installation

    Product Dimensions and Installation NX700 PLC Product Dimensions System Dimensions (mm) NX-CPU750B NX-X64D NX-X64D NX-X32D NX-Y32T NX-Y16T NX-Y16T NX-Y16T NX-Y16T 115.5 118.5 unit (mm) Dimensions Slot Types 111.0 3-slot type 205.0 183.8 5-slot type 276.0 254.2 8-slot type 381.0 359.8 10-slot type 452.0 430.2...
  • Page 52 CPU, I/O, Module Dimensions (mm) NX-CPU750B NX-X16D NX-Y64T 115.5 35.0 104.0 SCU Unit and Special Unit Dimensions (mm) NX-MWLINK NX-SCU NX-EtherNet 115.5 COM1 RS232C RS485 COM2 RS232C RS485 35.0 35.0 35.0 104.0...
  • Page 53: Nx70 Plc Product Dimensions

    NX70 PLC Product Dimensions System Dimensions (mm) 30.0 38.0 4 - M5 unit (mm) Slot Types Catalog Number Dimensions (A) Dimensions (B) Dimensions (C) 2-slot type NX70-BASE02 149.5 129.5 115.5 3-slot type NX70-BASE03 185.0 165.0 151.0 5-slot type NX70-BASE05 256.0 236.0 222.0 6-slot type...
  • Page 54: Power Unit Dimensions(Mm)

    Power Unit Dimensions(mm) CPU, I/O, Special Unit Dimensions (mm) COM1 RS232C RS485 COM2 RS232C RS485...
  • Page 55 Installation Installation Removal 1. Insert the module holding projector of 1. Unfasten the screw that holds the the module into the module holding module in place using a screwdriver. groove on the backplane. 2. Push the top of the module toward the 2.
  • Page 58 NX70/NX700 Serial Communications Unit (SCU) User Manual www.samsungautomation.co.kr Rockwell Samsung Automation Technical Support Export Sales Team 447-6, Gongse-Ri, Giheung-Eup, Youngin-City, Tel: 82-31-280-4768 Fax: 82-31-280-4900 Gyeonggi-Do, South Korea, 449-902 Tel: 82-31-280-4700 Fax: 82-31-280-4900 Trademarks not belonging to Rockwell Samsung Automation are property of their respective companies. Publication RSA-NX700-UM009B-EN-P - July 2005 Supersedes Publication RSA-NX700-UM009A-EN-P - March 2005 Copyright ©...

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Samsung nx700Samsung nx70-scuSamsung nx-scu

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