2
[Design Precautions]
WARNING
●
Configure safety circuits external to the programmable controller to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the programmable controller.
Failure to do so may result in an accident due to an incorrect output or malfunction.
(1) Emergency stop circuits, protection circuits, and protective interlock circuits for conflicting
operations (such as forward/reverse rotations or upper/lower limit positioning) must be configured
external to the programmable controller.
(2) When the programmable controller detects an abnormal condition, it stops the operation and all
outputs are:
• Turned OFF if the overcurrent or overvoltage protection of the power supply module is
activated.
• Held or turned off according to the parameter setting if the self-diagnostic function of the CPU
module detects an error such as a watchdog timer error.
(3) All outputs may be turned on if an error occurs in a part, such as an I/O control part, where the
CPU module cannot detect any error. To ensure safety operation in such a case, provide a safety
mechanism or a fail-safe circuit external to the programmable controller. For a fail-safe circuit
example, refer to the user's manual for the CPU module used and "General Safety Requirements"
in MELSEC iQ-R Module Configuration Manual.
(4) Outputs may remain on or off due to a failure of a component such as a relay and transistor in an
output circuit. Configure an external circuit for monitoring output signals that could cause a
serious accident.
●
In an output circuit, when a load current exceeding the rated current or an over current caused by a
load short-circuit flows for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.
●
Configure a circuit so that the programmable controller is turned on first and then the external power
supply. If the external power supply is turned on first, an accident may occur due to an incorrect output
or malfunction.
●
For the operating status of each station after a communication failure, refer to manuals relevant to the
network. Incorrect output or malfunction due to a communication failure may result in an accident.
Summary of Contents for 13JV28
Page 1: ...iQ Sensor Solution Reference Manual ...
Page 2: ......
Page 166: ...164 6 Ethernet 6 5 Backing up Restoring Data of Devices Supporting iQSS MEMO ...
Page 185: ...7 AnyWireASLINK 7 4 Backing up Restoring Data of Devices Supporting iQSS 183 7 Sample program ...
Page 195: ...7 AnyWireASLINK 7 4 Backing up Restoring Data of Devices Supporting iQSS 193 7 Sample program ...
Page 228: ...226 8 CC Link 8 4 Backing up Restoring Data of Devices Supporting iQSS Sample program ...
Page 238: ...236 8 CC Link 8 4 Backing up Restoring Data of Devices Supporting iQSS Sample program ...
Page 244: ...242 8 CC Link 8 4 Backing up Restoring Data of Devices Supporting iQSS Sample program ...
Page 309: ...10 Ethernet 10 5 Backing up Restoring Data of Devices Supporting iQSS 307 10 Sample program ...
Page 371: ...APPX Appendix 8 Backup File Capacity 369 A MEMO ...
Page 373: ...I 371 MEMO ...
Page 377: ......