Mitsubishi Electric Q172CPU User Manual Page 193
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6 INSPECTION AND MAINTENANCE
Input Circuit Troubleshooting and Corrective Action (Continued)
Condition Cause Corrective action
Example 5
Input signal
does not
turn OFF.
• Sneak path due to the use of two power
supplies.
Input module
E
1
E
2
>
E
2
E
1
• Use only one power supply.
• Connect a sneak path prevention diode.
(Figure below)
Input module
E
1
E
2
Example 6
False input
due to
noise
Depending on short response time setting, noise
is imported as input.
Change response time setting.
Example : 10ms
20ms
<Calculation example of Example 4>
For the case with a switch with LED indicator connected to Q172LX,
causing 4 mA leakage current.
Motion CPU
module
Leakage
current 4mA
24VDC
3.6K
Q172LX
(a) The 0.18 mA OFF current of the Q172LX is not satisfied. Connect a resistor as
shown below.
Input impedance
24VDC
4mA
I
R=
3.82mA
Q172LX
Iz=0.18mA
5.6K
3.6K
(b) Calculate the connecting resistor value R as indicated below.
To satisfy the 0.18 mA OFF current of the Q172LX, the resistor R to be connected
may be the one where 3.82 mA or more will flow.
I
R:
I
Z=
Z(Input impedance): R
R Z(Input impedance)= 5.6 10 =264[ ]
3.82
0.18
I
R
I
Z
3
R<264
.
Assuming that resistor R is 220
, the power capacity W of resistor R is:
W = (Input voltage)
2
÷ R = 26.4
2
÷ 220 = 3.168 [W]
(c) The power capacity of the resistor selected is 3 to 5 times greater than the actual
current consumption. 220 [
], 10 to 15 [W] resistor may therefore be connected to
the terminal in question.
- MOTION CONTROLLERS 1
- SAFETY PRECAUTIONS 2
- (1) System structure 4
- CAUTION 10
- 1. OVERVIEW 18
- (Note-2) : SSCNET: S 19
- 2. SYSTEM CONFIGURATION 20
- SSCNET cable 21
- (a) MR-H BN 39
- (c) FR-V5 0 41
- (4) Software packages 41
- (a) PLC software package 42
- 2.3 General Specifications 43
- (2) Q173CPU/Q172CPU 46
- Q172CPU(N) 48
- (a) Module specifications 49
- 2.4.2 Power supply module 55
- 100-120VAC 58
- (When using the Q173CPUN-T.) 61
- (4) I/O allocations 64
- (1) Q172LX name of parts 65
- (b) Input 66
- (a) Servo external signals 67
- • Tracking enable signal 73
- Q173CPU(N)/ 74
- Cable length 10m (32.81ft.) 76
- (b) Q172EX-S2/Q172EX-S3 77
- (a) Specifications 78
- Battery Specifications 78
- (b) Battery replacement 78
- Q173PX-S1 80
- (Note-1)(Note-2) 81
- (Duty ratio: 50% 25%) 86
- 20 s or more 86
- A4 A3 A2 87
- B4 B3 B2 87
- CN1A CN1B 101
- 2 SYSTEM CONFIGURATION 102
- (h) FR-V5NSCBL 107
- (a) MR-H-BN configuration 108
- (b) MR-J2 -B configuration 108
- 1) Example of Q173CPU(N) 110
- 2) Example of Q172CPU(N) 112
- 2.4.10 External battery 115
- 3. DESIGN 120
- 3 DESIGN 123
- 3.2 External Circuit Design 123
- MR-J2-03B5 124
- Electro 124
- (For A31TU-DN ) 125
- (For A31TU-D3 ) 127
- MC1 N0 M10 129
- (2) Grounding 131
- Forced stop 132
- Internal 132
- Wpw= (I 136
- 3.4 Design Checklist 139
- 4 INSTALLATION AND WIRING 141
- (1) Fitting dimensions 142
- Vertical Flat 143
- Motion CPU 146
- PC connector 147
- Battery cable 148
- CPU/BAT connecto 148
- Battery unit 148
- (Q170BAT) 148
- TU connector 149
- (3) Grounding 156
- [Servo data setting 162
- Power supply module 171
- PLC CPU module 171
- Motion CPU module 171
- I/O module 172
- 6.3 Periodic Inspection 173
- 6.4 External Battery 174
- (Note-1) 175
- (Note-3) 175
- (Note-2) 175
- MITSUBISHI 176
- LITHIUM BATTERY 176
- Lithium battery 178
- Memory card socket 178
- Is the power 182
- 132VAC or 170 to 264VAC? 182
- "RUN" LED 184
- For the case of 1) 184
- For the case of 2) 184
- When started the latch clear 186
- Are the output 188
- USB driver installed 190
- Win 98/2000/XP? 190
- DC input 192
- (plus common) 192
- Input module 192
- Resistor 192
- Output module 194
- APPENDICES 196
- PPENDICES 198
- (a) Q172J2BCBL M(-B) 198
- 1) Model explanation 198
- 2) Connection diagram 198
- (b) Q172HBCBL M(-B) 199
- Q173DVCBL M 200
- (d) Q173J2B CBL M 201
- (e) Q173HB CBL M 202
- :Twisted pair cable 203
- (h) MR-HBUS M 205
- (2) MR-JHSCBL M-L/H 207
- (a) Model explanation 207
- (b) Connection diagram 207
- (3) Q170ENCCBL M 208
- (Note) 209
- Q170TUD3CBL3M 211
- Q170TUDNCBL3M 212
- 27.4(1.08) 215
- 98(3.86) 215
- 114.3(4.50) 215
- 46(1.81) 215
- 79.5(3.13) 215
- (3) Q172CPUN-T Module 216
- (4) Q173CPUN-T Module 216
- (5) Q172CPU Module 217
- (6) Q173CPU Module 217
- (1) Q173PX 220
- (2) Q173PX-S1 220
- (2) Q64P 221
- (1) Dividing unit (Q173DV) 222
- (2) Battery unit (Q170BAT) 222
- APPENDIX 2.7 Connector 223
- (6) A31TUD3TM 227
- Effective dimension 229
- Keyway Dimensional Diagram 229
- WARRANTY 233
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