Samsung Ht As700 User Manual

							51 BCD (Binary Coded Decimal)
BCD is used to express a decimal digit (0 to 9) using 4 bits. Conversion 
of BCD values can be done in hexadecimal calculations.
Flash ROM 
It refers to a ROM (EEPROM) that stores programs. Since its contents 
can be deleted periodically, it is frequently used for equipments that 
deals with programs such as a PLC.
How to use a register 
 R (Relay) register (Can be bit, word or double word)
Indicates the external I/O register that directly connects to the 
general I/O module
 M (Memory) register (Can be bit, word or double word)
An internal bit memory address which supports the relay of logical 
operations. It is used as a word or double-word variable for 
general calculations and programs. 
When the power of the PLC is turned off or the CPU has stopped, 
the register value is reset to 0.
 W (Word) register (Can be bit, word or double word)
Same usage as M registers. The value is preserved after the power 
is turned off, but can be cleared by program downloads or special 
command words.
Not used as a bit (register only for word use)
 K (Keep) register (Can be bit, word or double word)
Used for general calculation programs. The value is preserved 
after the power is turned off.
 F (Flag) register (Only process bit)
These bit registers provide special application specific functions to 
the programmer of the PLC. They are also used as system control 
bits, providing Run/Stop control of the PLC.
 When a calculation or input value exceeds 65,535 (FFFF)
Use a double word instruction that can store and calculate values 
over 65,535 in the K, M, R, and W registers. When a double word 
instruction is used, it can represent values up to 4,294,967,295 (2
32).
 When you want to reload the contents or values that you worked 
today
Use the K and W area. These are preserved unless specifically 
erased. The W area is erased by special instructions or program 
downloads.
 When you need numerical expressions such as A+B=C, 34 × 45=D, 
A1>C1.
Use the R, M, W, and K area. If you use the R area, you can refer to 
and output calculated values in I/O modules.
NOTE
Example: 59 (BCD) = 59 (HEX), 32 (BCD) = 32 (HEX)
 
						

							52 For bit operations, such as setting, resetting, shifting, or rotating
Use the M, K, and R area. You cannot perform bit operations in the 
W area.
 When you want to refer to or modify the set value of the timer or 
counter.
Refer to or modify W2048 to W2303 or SV0 to SV255.
 When you want to refer to or modify the present value of the 
timer or counter.
Refer to or modify the address area from W2304 to W2559 or from 
PV0 to PV255. The value holds true in STOP (PROG.) state in this 
area. 
The present value (PV) of the counter is maintained even after the 
power is off.
Processor Operation Mode
What is the Processor operation mode?
The processor has an external RUN/REMOTE/PROG switch. The PLC 
performs a system check that determines the position of the switch. 
The switch position determines which operating mode the PLC is in. 
It can set to RUN, STOP, REMOTE, or ERROR mode.
The PLC reads the external contact signals in Run mode and executes 
the user program stored in RAM. The external outputs are updated 
every scan according to program results.
The user program is stopped and the external outputs are turned Off. 
In the Stop mode, you may correct, delete or transfer the 
program.(This is the only mode in which you can save a program in 
flash memory.)
A user program is operated at every scan and the I/O and result value 
is maintained. This mode is used when checking and debugging a 
program at every scan. This mode is similar to the Stop mode, but it 
does not initialize data. 
It occurs when the CPU module finds internal defects after running the 
self-diagnoses. Functions are not executed normally in this mode. 
When an error occurs, the CPU stops all programs and turns all output 
off. When an Error mode occurs, the user should check the error code 
and take appropriate measures. Then turn the power on or put the 
mode conversion switch in Prog and press the Initialize Key to clear the 
error.
RUN Mode
 (operating)
STOP Mode
PAUSE Mode
ERROR Mode
 
						

							53
 Allowed Functions in Operation Modes
 5=On,  ◑=Flashing, 
●=Off
When the PROG.LED is on, you can change the user program.
The INITIALIZE switch clears errors when the mode switch is set to 
PROG. 
When the mode switch is set to REMOTE and power is switched from 
Off to On, the previous mode of operation is restored.
When debugging the user program, the mode switch should be set to 
REMOTE.
Processor Processing Procedure 
Program processing procedure
 Program analysis
Executes the program from its first step to its final step and stores 
the internal/external output in the working RAM.
 Peripheral device signal processing
Stores data from the communication module or peripheral device 
to the internal memory.
 Forced I/O processing
Turns on/off forced I/O bits, if any.
 I/O processing
Preserves the On/Off state of the external I/O and uses it as an 
input in the next scan. (For accurate processing, input should 
continue for more than 1 scan time.)
The processed program outputs are sent from internal memory to 
the external memory.
Operation mode 
selector switchOperation 
modeLED status
RUN LED  
PROG LEDProgram 
chang eData 
ch a n g eInitialize 
switch is 
enabledMode at power 
off-on
RUNRUN
5          
●Disallowed Allowed
○Run
STOP
●          
5Allowed Allowed
○Run
REMOTERUN
5          5Allowed Allowed
○Run
PA U S E
◑          
5Allowed Allowed
○Pause
PROG STOP
●          
5Allowed Allowed
○Stop
Program 
analysis
The diagram indicates the PLC 
program processing procedure. 
The CPU regularly repeats 
procedure 1 through 5. This cycle 
is called 1 scan time.
1 scan timePeripheral device 
signal processing
Forced I/O
Process I/O
Watchdog time -> 0
 
						

							54 Watchdog time initialization
The watchdog elapsed time value is set to 0. (This value is the 
watchdog calculation point until the next scan.)
The following illustration shows the difference between the relay 
board and PLC sequence processing. The relay carries out all 
sequences simultaneously while the PLC processes sequentially 
throughout the program.
Processing of relay sequence
(Parallel process)Processing of PLC program
(Serial process)
 
						

							55
4
Installation and Wiring
Installation
Installation space and environment
External dimensions (mm)
unit (mm)
 3-slot type5-slot type8-slot type10-slot type12-slot type
A (mm) 205.0 276.0 381.0 452.0 522.0
B (mm) 183.8 254.2 359.8 430.2 500.6
 
						

							56
Installation location 
Be sure to maintain a sufficient distance from wiring ducts, and other 
machines below and above the module for proper ventilation. 
Do not install the modules stacked up or horizontally. Doing so will 
prevent proper cooling of the module and cause overheating inside 
the PLC (programmable controller). 
Do not install the module above devices which generate heat such as 
heaters, transistors or large scale resistors. 
In order to eliminate any effects from noise emission, power wires and 
electromagnetic devices should be kept at least 100 mm away from the 
surfaces of the module. When installing the module behind the doors 
of the operation panel, be especially careful to maintain these 
distances. 
Space for programming tool connection
Leave a space of at least 180 mm from the mounting surface for 
programming tool connections and wiring.  
Duct
50mm or more
Duct
50mm or more
50mm or more
DuctPLC 
body
Other 
equipmentsDoor of the panel 50mm or more
100mm or more
Programming 
cable
Approx. 180mmApprox. 110mm
 
						

							57
Avoid installing the module in the following conditions
 Ambient temperature outside the range of 0 to 55 °C 
 Ambient humidity outside the range of 30 to 85% RH 
 Sudden temperature changes causing condensation 
 Inflammable or corrosive gases
 Excessive airborne dust, metal particles, salinity
 Benzene, thinner, alcohol, other organic solvents or strong alkaline solutions such as 
ammonia or caustic soda
 Excessive vibration or shock
 Direct sunlight 
 Location near high-tension wires, high-voltage devices, power cables, power devices, or 
other devices with generate large power surges or electronic fields when starting and 
stopping (esp. if within 100 mm)
Power Supply Module Wiring
Power supply module wiring 
The output voltage of a power supply should be within the allowed 
voltage 
Power supply unit terminal screw 
NUse M3.5 screw for terminal. 
NX700 POWER 
Use cables thicker than 
2mm
2 and make them 
into twisted pair wires. 
Use insulation transformer 
when there is excessive noise.
For grounding, use cables 
thicker than 2mm
2.  Brake 
(NX-POWER) 
Service power (24V)
Supplying 24V to I/O units. 
However, avoid parallel 
connection with another 24V 
source or other different ATTENTION
 Product nameRated input voltageAllowed voltage range
NX-POWER11 0-220V AC85-264V AC
 
						

							58
NIt is recommended that you use crimped terminal for wiring. 
Use 2mm2 twisted pair cable or larger
 Use power supply wire that is thicker than 2mm2 to minimize voltage drops.
 Use twisted pair cable to minimize noise effects.
Proper compressed connection terminal
 Circular type terminal (O type Lug)
 Circular type terminal with insulation resistance
 Open type terminal (Y type Lug)
Power supply system
Use separate wiring systems for the PLC module, I/O module, and 
power supply module as shown in the following diagram.
Use isolation transformer for noisy environments
 Use a low noise power supply.
 Use an isolation transformer to reduce the noise as illustrated above.
NOpen type terminalNCircular terminal
7. 0 m m
or less 7. 0 m m
or less 
Φ3.7 to Φ4.3 hole 
Motor device 
External I/O
device
Insulation 
Insulation transformer Insulation transformer
 
						

							59
Grounding
Ground the PLC for noisy environments 
 Connected to the metal part of backplane, the frame ground terminal is connected to a solid 
earth ground.
 Use ground wires with a minimum of 2mm
2 and the triple grounding connection which has 
a resistance of less than 100 Ω.
 The point of grounding should be as close to the PLC as possible and the ground wire 
should be as short as possible.
 If two devices share a single ground point, it may produce an adverse effect. Always use an 
exclusive ground for each device.  
Other devices 
including 
Other devices 
including 
 
						

							60
Input and Output Wiring
Input wiring
Checkpoints for input module wiring 
There can be limits on the number of points that can be 
simultaneously turned on, based on the module type.
Check such limits in the specifications of each input module. In 
particular, be careful when using in high ambient temperature.
The connection method for each type of input device including sensor 
is described below. 
Photoelectric sensors and proximity sensors 
Relay output type 2 wired type 
Internal CircuitInput 
terminal
COM 
terminal
Sensor 
Input Sensor powerSensor
DC input unit
Sensor
DC input unitpower
Input 
terminal
COM 
terminal
Input power
Internal Circuit
NPN open collector output type  PNP open collector output type 
Sensor output
Internal Circuit
Sensor
DC input unit
Input 
terminal
COM 
terminal
Input power
Sensor
Internal Circuit
DC input unit
COM 
terminal Input 
terminal
Input power
Voltage output type
Internal Circuit
Sensor
DC input unit
Input 
terminal
COM 
terminal
Input power
Sensor output