Samsung Ht As700 User Manual

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I / O  ch e ck  f l ow  ch a r t
This page presents an example of a 
troubleshooting procedure based 
on the right circuit. 
 
						

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External environment check flow chart
 
						

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Inspection and Maintenance
Inspection and maintenance
Input module
SymptomPossible causeAction
Power supply LED will not 
illuminate. Fuse blows Replace the fuse
Fuse blows frequently. Short circuit or defective partReplace the power supply or the 
CPU module
Run LED will not illuminate.Program errors Correct the program
Power line defect Replace the CPU module
Output will not turn to On state 
during Run.Short or open circuit Replace the CPU module
I/O modules above a certain 
address will not operate.I/O bus error Replace the backplane module
Input or output module of only 
certain address will turn to On 
state.I/O bus error Replace the backplane module
Not all contacts on an output 
module operate properly.I/O bus error Replace the backplane module
SymptomPossible causeAction
No inputs on an input module will 
turn On (LEDs are not illuminated).No external input power Supply power
Low external input voltage Supply rated load power
Loose terminal screw or defective 
contactTighten the screw and reconnect 
the module
Inputs will not turn to On state 
(LEDs are illuminated).Defective input circuit Replace the input module
Inputs will not turn to Off state. Defective input circuit Replace the input module
One or more inputs on an I/O 
module will not turn On.Device connected to the input 
module is defective.Replace the input device
Loose input wiring Reconnect the input wiring
External input time is too short. Adjust the input module
Loose terminal screw or defective 
contactTighten the screw and reconnect 
the module
One or more inputs on an I/O 
module will not turn Off.Defective input circuit Replace the input module
Input changes On/Off state 
erratically.Low external input voltage Supply rated input voltage 
Noise error  Troubleshoot for noise
Loose terminal screw or defective 
contactTighten the screw and reconnect 
the module
Input display LED will not 
illuminate (input is On in PLC). LED error  Replace the input module
 
						

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Output module
SymptomPossible causeAction
No outputs on an output module 
will turn On.No external input power Supply power
Low external input voltage Supply rated load power 
Loose terminal screw or defective 
contactTighten the screw and reconnect 
the module
Defective I/O connector contacts Replace the output module
Defective output circuit Reconnect the output module
No outputs on an output module 
will turn Off.Defective output circuit Replace the output module
One or more inputs on an I/O 
module will not change to On state 
(LED is illuminated).Output time too short Correct the program
Defective output circuit Replace the output module 
One or more inputs on an I/O 
module will not change to On state 
(LED is not illuminated).Incorrect output load Replace the output load
Short output wiring Reconnect the output wiring
Loose terminal screw or defective 
contact Tighten screw and reconnect the 
module
Defective output contact  Replace the output module or relay 
Defective output circuit Replace the output module 
One or more outputs on an I/O 
module will not change to On state 
(LED is illuminated).Defective output circuit Replace the output module or relay
Error caused by leak or residual 
currentReplace the external load 
One or more outputs on an I/O 
module will not turn Off (LED is not 
illuminated).Defective output circuit Replace the output module
Output changes On/Off state 
erratically.Low external input voltage Supply rated load power
Noise error  Countermeasure against noise 
Loose terminal screw or defective 
contact Tighten the screw and reconnect 
the module
A set of 8 points on an I/O module 
operate incorrectly or identically. Loose common terminal screw Tighten the screw and reconnect 
the module
Defective terminal connectorTighten the screw and reconnect 
the module
CPU module error  Replace the CPU module
Output display LED is not 
illuminated.LED error Replace the output module
 
						

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Periodic inspection and maintenance items
The NX-CPU700p controller requires periodic inspection and 
maintenance for proper operation. The following items should be 
checked every six months, but the period can be shortened according 
to the operational environment. 
Precautions when troubleshooting
• Always turn off the power whenever installing or removing modules.
 Check the module once more before replacing the defective part.
 Return the defective module for repair with any detailed information 
about its problems. 
 When a contact is defective, clean the contact with a clean cotton and 
alcohol and then retest the module. 
 Do not use thinner to clean since it might cause discoloration on the 
module’s case.
ItemCheck itemRequirementRemarks
Supplied powerDoes the voltage measured within the 
power terminal fall within the specified 
range?Voltage must be within the 
power module input voltage 
specifications. Vo l t m e t e r
EnvironmentDoes the temperature fall within the 
specified range?0 to 55 °C Thermometer
Does the humidity fall within the 
specified range? 35 to 85%RH Hygrometer
Is there any dust present? No dust Visual
I/O powerDoes the control voltage supplied to the I/
O modules fall within the specified limit? Control voltage must be 
within the input and output 
modules specifications. Vo l t m e t e r
Module 
mounting and 
wiring Are all modules firmly mounted?
All should be firmly secured. Screwdriver Is the connection cable firmly wired?
Is the external wiring screw tight? 
Life expectancy 
of partsContact relayElectric lifetime: 
100,000 to 300,000 operations 
Battery 3 years at 25 °C
 
						

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6
Programming Instructions
Refer to the NX7/NX70/NX700 Instruction Set Reference Manual for detailed 
information on the NX7, NX70, and NX700 instruction set and for application 
examples to show the instruction set in use.
Basic Sequence Instructions
MnemonicNameLadder SymbolDescription
STR Start Starts contact A.
STN Start Not Starts contact B.
AND And Contact A series circuit
ANN And Not Contact B series circuit
OR Or Contact A parallel circuit
ORN Or Not Contact B parallel circuit
OUT Out Arithmetic result output
SET Set Sets output and retains On.
RST Reset Resets output and retains Off.
NOT Not Inverts circuit.
STR DIF Start Differential Starts rising edge contact             .
STR DFN Start Dif. Not Starts falling edge contact  .
AND DIF And Dif. Rising edge series connection 
AND DFN And Dif. Not Falling edge series connection 
OR DIF Or Dif Rising edge parallel connection 
OR DFN Or Dif. Not Falling edge parallel connection 
ANB And Block Circuit blocks series connection.
ORB Or Block Circuit blocks parallel connection.
MS Master block SetStarts master block.
(for processor version 2.0 or higher)
MR Master block ResetEnds master block.
(for processor version 2.0 or higher)
MCS Master Control Set Starts circuit branch.
MCR Master Control Reset     Ends circuit branch.
- ExtensionExtension (Used in pairs with AND condition 
when extending. Exclusive for WinGPC, 
GPC5, etc)
 (    )
(    )
 (    )
(    )
(    )
(OUT) 
(SET) 
(RST)
R
F
R
F
R
F
(MS) 
(MR)
>>
IMPORTANT
(    )
 
						

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Input
Output
Timer, Counter and Shift Register 
Instructions
MnemonicNameLadder 
SymbolDescriptionRemarks
TIM On Delay TimerTurns on after set delay 
time from input on
 Time base: Ch 0 to 63 = 0.01s
Ch 64 to 255 = 0.1s
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
TOF Off Delay TimerTurns off after set delay 
time from input offTime base: Ch 0 to 63 = 0.01s
Ch 64 to 255 = 0.1s
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
SSTSingle Shot 
TimerTurns off after set delay 
time from input onTime base: Ch 0 to 63 = 0.01s
Ch 64 to 255 = 0.1s
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
UCUp CounterUp counter
Channel range: Ch 0 to 255 
                   (Shared with timer)
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
DC Down CounterDown counter
Channel range: Ch 0 to 255 
                   (Shared with timer)
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
RCT Ring CounterRing counter
Channel range: Ch 0 to 255 
                   (Shared with timer)
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
UDCUp-Down 
CounterUp-Down counterChannel range: Ch 0 to 255 
                   (Shared with timer)
Setting range: SV = 0 to 65535
Contact indicator: TC + channel 
number
SR Shift RegisterShift RegisterUsable address areas for Sb and 
Eb : M, K
1 bit shift on each p input.
Stores the status value I in Sb for 
every P input.
Max. number of instructions: 256 
 SST 
Ch=00100
SV=00005Input
Output
 TIM 
Ch=00010
SV=00050Input
Output
 TOF 
Ch=00064
SV=00005
 UC 
U Ch=020 
SV=004 
 
R  
 DC 
D Ch=021 
SV=005 
 
R  
 RCT 
T Ch=022 
SV=004 
 
R  
 UDC 
U Ch=023
SV=003
D  
 
R 
 SR 
I Sb=K1.4
Eb=K2.5
P  
 
R 
Input
Current 
value
Output
ResetSet 
value
Input
Current 
value
Output
ResetSet value
Input
Current 
value
Output
ResetSet value
U Input
D Input
Current 
value
ResetSet value
value
 
						

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Comparison Instructions
              For double word comparison instructions, the letter D should precede the word comparison instructions in the 
Mnemonic program.
Substitution, Increment and Decrement 
Instructions
MnemonicNameWord ladder 
symbolDouble word 
ladder symbolDescription
STR ==
AND ==
OR ==START ==
AND ==
OR ==On if A is equal to B.
A and B are word/double word or 
data value.
STR 
AND 
OR START 
AND 
OR   On if A is not equal to B. 
 is same with 
≠.
A and B are word/double word or 
data value.
STR >
AND >
OR >START >
AND >
OR >On if A is greater than B.
STR >=
AND >=
OR >=START >=
AND >=
OR >=On if A is equal to or greater than B.
STR 
						

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Arithmetic Instructions
MnemonicNameWord ladder 
symbolDouble word 
ladder symbolDescription
ADD 
(DADD)Decimal additionD = S1 + S2 
(Decimal operation)
ADDB 
(DADDB)BCD additionD = S1 + S2 
(BCD operation)
SUB 
(DSUB)Decimal 
subtractionD = S1 - S2 
(Decimal operation)
SUBB 
(DSUBB)BCD subtractionD = S1 - S2 
(BCD operation)
MUL 
(DMUL)Decimal 
multiplicationD = S1 x S2 
(Decimal operation)
MULB 
(DMULB)BCD multiplicationD = S1 x S2
(BCD operation)
DIV
(DDIV)Decimal divisionD = S1/S2  (Decimal operation), 
Error when S2= 0
DIVB 
(DDIVB)BCD divisionD = S1/S2  (BCD operation)
Error when S2 = 0
ADC 
(DADC)Decimal addition 
with carryD = S1 + S2 + CY  
(Decimal operation, include carry)
ADCB 
(DADCB)BCD addition with 
carry D = S1 + S2 + CY  
(BCD operation, include carry)
SBC 
(DSBC)Decimal 
subtraction with 
carry D = S1 - S2 – CY 
(Decimal operation, include carry)
SBCB 
(DSBCB)BCD subtraction 
with carry D = S1 - S2 - CY  
(BCD operation, include carry)
ABS 
(DABS)Absolute valueD = |D|  
(Absolute value operation)
WNOT 
(DNOT) NOT 
(1’s complement)Store 1’s complement of D in D 
NEG 
(DNEG)Negative 
(2’s complement)Store 2’s complement of D in D
(1’s complement + 1) (- Result)