22 -
52
22. TROUBLESHOOTING
Situation
Cause
Countermeasure
Exam
ple 8
The load is
momentarily turned
ON when the external
supply power is
started up.
(Transistor output)
Incorrect output due to the floating capacitance (C)
between the collector and emitter of the
photocoupler
This does not affect normal loads, but in case
of highly sensitive loads (such as solid state
relays ), incorrect outputs may occur.
Photocoupler
(1) If the external supply power is suddenly started
up, current Ic flows due to the floating
capacitance (C) between the collector and
emitter of the photocoupler.
(2) Current Ic flows to the base of transistor Tr1 in
the next stage, and output Y0 turns ON for
about 500 s.
(1) After checking the external supply power takes
at least 10ms to start up when turned it ON/
OFF, set the switch SW1 at the primary side of
the external supply power.
(2) If setting the switch at the secondary side of the
external supply power is required, connect a
capacitor and resistor so that the start-up of the
power is slowly performed (Longer than 10ms).
Example:
R1 = 40
, C1 = 300
F
Calculate the time constant as follows:
R1: Several tens of ohms
Power capacity
(External supply power current)
2 *1
Resistive value
(3 to 5)
*2
C1: Several hundreds of F, 50 mV
*1
For the current consumption of the external supply
power, refer to the manual attached to the module
to be used.
*2
Select the resistance for power capacity in the
range of between 3 and 5 times higher than the
actual power consumption.
C1
R1 =
300
10
-6
40
= 12
10
- 3
S
= 12ms
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 ...
Страница 567: ...MEMO ...
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