APPX
Appendix 11 General Safety Requirements
249
A
Fail-safe measures when a C Controller system fails
Failures of a C Controller module can be detected with the self-diagnostic function; however, failures which occur in a part,
such as an I/O control part, may not be detected.
In this case, all inputs or outputs may turn ON or OFF, or normal operation and safety of the control-target device may not be
ensured depending on the failure.
Even though Mitsubishi programmable controllers are manufactured under strict quality control, they may fail due to some
reasons. Configure fail-safe circuits external to the C Controller module so that no machine is damaged and no accident
occurs.
The system example and its fail-safe circuit example are shown below.
*1 Mount an output module for fail-safe purpose on the last slot of the system. (In the example above, the output module is mounted on
Y80 to Y8F.)
*2 Create a program to make Y80 repeats ON and OFF at the interval of 0.5 seconds.
*3 Since Y80 turns ON and OFF at the interval of 0.5 seconds, use an output module without contact. (In the example above, a transistor
output module is used.)
*1
C Controller
module
Power supply
module
Power supply
module
X00 to X0F
X10 to X1F
X20 to X2F
X30 to X3F
Y50 to Y5F
Y60 to Y6F
Y70 to Y7F
Y80 to Y8F
Y40 to Y4F
Empty
1s
1s
MC
T2
T1
Y80
Y81
Y8F
24V
0V
Y80
0.5s
0.5s
MC
…
…
T1
T2
User program*2
Load
Load
24 VDC
Output module*3
C Controller module
Содержание MELSEC iQ-R C R12CCPU-V
Страница 1: ...MELSEC iQ R C Controller Module User s Manual Application R12CCPU V ...
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Страница 23: ...1 EXECUTING PROGRAMS 1 3 I O Access Timing 21 1 MEMO ...
Страница 32: ...30 3 MEMORY CONFIGURATION OF C Controller Module 3 4 Files MEMO ...
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