Samsung Ht As700 User Manual
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Page 81
81 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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82 External environment check flow chart
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83 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...
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84 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...
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85 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...
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86
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87 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...
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88 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...
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89
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...
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90 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...