22 -
48
22. TROUBLESHOOTING
Calculation example for Example 4
• Voltage V
TB
between the terminal and common is as follows:
Because the condition for the OFF voltage ( 6[V]) is not satisfied, the input does not
turn off. To correct this, connect a resistor as shown below.
• Calculation of resistance of connected resistor R
The voltage of AX40 between the terminals must be reduced to within 6[V]. The
current for reducing the voltage between the terminals to within 6 [V] is:
Therefore, resistor R for flowing current I of 5[mA] has to be connected.
• Resistance of the connected resistor R is obtained in the following equations.
Suppose that the resistance R is 2[k
].
The power capacity W of the resistor when the switch turned on is:
• Because the resistance is selected so that the power capacity is three to five times
the actual power consumption, 1.5 to 2 [W] should be selected. From the above,
the resistor to be connected across the terminal in question and COM is 2[k
] 1.5
to 2[W].
Situation
Cause
Countermeasure
E
xample 5
Input signal does not
turn OFF.
• Sneak path due to the use of two power supplies. • Use only one power supply.
• Connect a diode for a sneak path. (Figure below).
If a switch with LED indication is
connected to theAX40 and leak current of
4mA is generated
V
TB
= 4[mA]
2.4[k
] = 9.6[V] (Ignore the voltage drop caused by the LED.)
(24 - 6[V])/3.6[k
]=5mA
6[V]/R 5 - 2.5[mA]
6[V]/Input impedance 2.4[k
]
6[V]/2.5mA
R
2.4[k
]
R
W = (Applied voltage)
2
/R
W = (26.4[V])
2
/2[k
] = 0.348[W]
Содержание Q2ACPU
Страница 1: ......
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Страница 221: ...12 12 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Страница 222: ...12 13 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Страница 237: ...12 28 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU MEMO ...
Страница 269: ...16 11 16 POWER SUPPLY MODULE 2 Names and description of parts of the A62P A62PEU and A65P module ...
Страница 271: ...16 13 16 POWER SUPPLY MODULE 4 Names and description of parts of the A66P ...
Страница 343: ...21 21 13 MAINTENANCE AND INSPECTION 21 4 2 Replacement of the fuse for an output module ...
Страница 357: ...22 12 22 TROUBLESHOOTING ...
Страница 359: ...22 14 22 TROUBLESHOOTING MEMO ...
Страница 417: ...App 20 APPENDICES 3 Shift instructions Classification Symbol Description n bit shift 1 bit shift 1 word shift ...
Страница 429: ...App 32 APPENDICES Trigonometric function Classification Symbol Description ...
Страница 432: ...App 35 APPENDICES 15 Clock instructions Classification Symbol Description Clock data read write ...
Страница 537: ...App 140 APPENDICES REMARK 1 Message 1 An error code is displayed in 2 Alert 1 3 Alert 2 ...
Страница 538: ...App 141 APPENDICES APPENDIX 6 EXTERNAL DIMENSIONS Appendix 6 1 CPU Module 1 Q3ACPU Q4ACPU modules Unit mm inch ...
Страница 539: ...App 142 APPENDICES 2 Q2ACPU Q2ACPU S1 modules Unit mm inch ...
Страница 541: ...App 144 APPENDICES 2 A66P power supply module Unit mm inch ...
Страница 542: ...App 145 APPENDICES Appendix 6 3 Main Base Unit 1 A32B base unit 2 A32B S1 base unit Unit mm inch Unit mm inch ...
Страница 543: ...App 146 APPENDICES 3 A35B base unit 4 A38B A38HB A38HBEU base unit Unit mm inch Unit mm inch ...
Страница 567: ...MEMO ...
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