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49
22. TROUBLESHOOTING
22.5.2 Faults in the output circuit
Faults concerning output circuits and the corrective actions are explained.
Faults in the output circuit
Situation
Cause
Countermeasure
Exam
ple 1
An excessive voltage
is applied to the load
when output is off.
(Triac output)
• When the load is subjected to half wave
rectification inside
(Solenoids have these types.)
• When the polarity of the power supply is (1), C is
charged, and when the polarity is (2), the voltage
charged in C + voltage of the power supply are
applied to the both ends of D1.The maximum
value of the voltage is about 2.2E.
• Connect a resistor at several tens to several
hundred of k to the both ends of the load.
With this kind of usage,
there is no problem with the output element,
but the diode built-in to the load may
deteriorate and burn-out.
Ex
ample 2
Load does not turn
OFF.
(Triac output)
• Leak current caused by built-in noise supressor
• Connect a resistor to the both ends of the load.
When the wiring distance from the output
module to the load is long, be aware of the
risk of a leak current due to line capacity.
Exam
ple 3
Load turns OFF with a
delay.
(Triac output)
• Leakage current due to surge suppressor for the
load.
• Disconnect the surge suppressor from across the
loads, leaving only the resistance.
When the wiring distance from the output
module to the load is long, be aware of the
risk of a leak current due to line capacity.
Ex
ample 4
When load is CR type
timer, the time limit
fluctuates.
(Triac output)
• Connect a resistance between the CR timer
terminals.
In some timers, internal circuit may be half
wave rectification type, so the caution as to
the example 1 is necessary here.
When the wiring distance from the output
module to the load is long, be aware of the
risk of a leak current due to line capacity.
Содержание Q2ACPU
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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 ...
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