Rockwell Automation Samsung NX70 User manual

NX70/NX700 Serial Communications Unit (SCU)
User Manual
www.DataSheet4U.com
( DataSheet : www.DataSheet4U.com )

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.
In no event will Rockwell Samsung Automation be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative
purposes. Because of the many variables and requirements associated with any
particular installation, Rockwell Samsung Automation cannot assume responsibility
or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Samsung Automation. with respect to use
of information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Samsung Automation. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING Identifies information about practices or circumstances which may
lead to serious personal injury or death, property damage, or
economic loss.
IMPORTANT Identifies information that is critical for successful application and
understanding of the product.
ATTENTION Identifies information about practices or circumstances that can lead
to minor personal injury, property damage, economic loss, or
product malfunction. However, depending on circumstances, failure
to follow the directions accompanying this symbol may also lead to
serious consequences.

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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 ........................................................................................... 19
Precautions for SCU Operation ................................................................... 20
Programming ................................................................................................ 22
NX70, NX700 PLC Installation Example...................................................... 33
PLC Programming Examples....................................................................... 34
Troubleshooting............................................................................................ 47
4. Product Dimensions and Installation........................ 51
NX700 PLC Product Dimensions ................................................................. 51
NX70 PLC Product Dimensions ................................................................... 53
Power Unit Dimensions(mm) ...................................................................... 54

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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. Otherwise it may cause overheating and product
WARNING • If this product is used in a situation that may cause
personal injury and/or significant product damage,
implement safe measures such as use of fault-safe
equipment.
• Do not use this product under any conditions exposed
to explosive gases. It may cause an explosion.
ATTENTION • Make sure to use an external device when configuring
the protective circuit breakers for emergencies or
interlock circuits.
• Fasten the terminal screws tightly to ensure that the
cable connection is secure. Incorrect cable connection
may cause overheating and product malfunction.
• Operate and keep the product under the allowed
conditions directed in product specifications.
Otherwise it may cause overheating and product
malfunction.
• Do not disassemble or remodel the product.
Otherwise it may cause an electric shock or
malfunction.
• Do not touch the terminals when the power is on.
Otherwise it may cause an electric shock.

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Installation Environment for SCU (Serial
Communication Unit)
ATTENTION Do not install your analog conversion modules if any of
the following conditions are present:
• Ambient temperature outside the range of 0 to 55 °C
(32 to 131 °F).
• Direct sunlight.
• Humidity outside the range of 30% to 85% (Non-
condensing).
• Chemicals that may affect electronic parts.
• Excessive or conductive dust, or salinity.
• High voltage, strong magnetic fields, or strong
electromagnetic influences.
• Direct impact and excessive vibration.
ATTENTION Installing the SCU Module on the System
1. Connect a communication cable to the SCU module.
2. Turn on the power to the external device connected
to the SCU module.
3. Turn on the main PLC power.
ATTENTION Removing the SCU Module from the System
1. Turn off the main PLC power.
2. Turn off the power to the external device connected
to the SCU module.
3. Remove the communication cable.

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ATTENTION Preventing SCU Module Malfunctions
• 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. Metal chips and debris that fall into the
module can cause damage.
• Do not touch with your hand the connector on the
bottom of the module which is used to connect to the
backplane . Otherwise, it can cause connection fault
and static electrical discharges.
• Do not drop or impose impact to the SCU module. It
can cause damage because the housing is made of
injection-molded plastics.
ATTENTION Preventing PLC System Malfunctions
• Use an isolation transformer and line filter on the
incoming power to the PLC when there is equipment
using or producing high current, high voltage, or
large magnetic fields in the vicinity.
• Use analog sensor that meets the rated specifications
for module connection. Otherwise,
it may cause operation errors.
• Separate the main PLC power line ground from all
other power grounds. Always use class 3 grounding.
• Do not exceed the current and power rating of the
external 24 VDC provided by the PLC power supply.
• Avoid system faults due to programming errors by
reading and fully understanding this system manual
and the PLC instruction set.
• Perform regular preventive maintenance on installed
systems, checking devices and wiring for potential
breakdowns and failures.

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1
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)
SCU Features
1. Two channels are implemented on a single unit (RS232C, RS485
selectable).
2. Data input/output with simple sequence instructions.
Use PLC advanced instruction READ to read data from the SCU, and
WRITE to write data to the SCU. CPU unit and SCU will handle the
task with shared memory, so there is no need for writing
complicated programs.
3. SCU unit is equipped with RS-485 network feature, added to the
existing N-series SDU module features, expanding its scope of
usage.
4. RS232C or RS485 communication network is available.
Data input/output with RS232 devices:
Connect to and exchange data with devices like IDX display,
measurement instrument, barcode reader, and printer. Data input/
output with RS485 devices:
Connect through network to temperature controller, network
inverter, and network servo.
5. Unlimited mounting in PLC slots, 500 byte transmission capability.
NX70 PCL SCU Unit
(NX70-SCU)
NX700 PCL SCU Unit
(NX-SCU)
Read data with the advanced instruction, READ
Write data with the advanced instruction,

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6. Both ASCII and HEX (binary) can be used as transmission code.
7. End code can be configured freely with PLC ladder instructions.
System Configuration
Using RS232C Communication
Using RS485C Communication
You can connect RS232C device/RS485 network device to each
RS232C/RS485 (CH1, CH2) channel.
NX series SCU can be mounted anywhere you want regardless of
whether the backplane is base or expansion. The number of SCU
mounting is not limited.
In addition to this Manual, please refer to System Manual and Programming
Manual for the PLC when using SCU.
NOTE
Barcode Reader
ID Card
Printer
Measurement
instrument
RS-232C Cable
RS-485 communication
Inverter
network
RS-485 communication
Temperature
controller network