Omron CK3M Series User Manual

4-2
Fail-safe Circuits
WARNING
Provide safety measures in external circuits to ensure safety in the sys-
tem if an abnormality occurs due to malfunction of the system due to
other external factors af
fecting operation. Not doing so may result in se-
rious accidents due to incorrect operation.
• Emergency stop circuits, interlock circuits, limit circuits, and similar
safety measures must be provided in external control circuits.
• You must take fail-safe measures to ensure safety in the event of in-
correct, missing, or abnormal signals caused by broken signal lines,
momentary power interruptions, or other causes.
• The use of an Uninterruptible Power Supply (UPS) allows normal op-
eration to continue even if a momentary power interruption occurs,
possibly resulting in the reception of an erroneous signal from an ex-
ternal device affected by the momentary power failure. Take external
fail-safe measures. Where necessary, monitor the power supply volt-
age on the system for external devices and use it as an interlock con-
dition.
• Unintended behavior may occur if an error occurs in the internal
memory of the product. As a countermeasure for these problems, ex-
ternal safety measures must be provided to ensure safe operation of
the system.
• The Controller will turn OFF all outputs from Output Units in the fol-
lowing cases. The slaves will operate according to the settings in the
slaves.
a) If a power supply error occurs
b) If the power supply connection becomes faulty
c) If a CPU error (watchdog timer error) or CPU reset occurs
d) If a major fault level Controller error occurs
e) While the Controller is on standby until RUN mode is entered af-
ter the power is turned ON
f) If a system initialization error occurs
As a countermeasure for these problems, external safety measures
must be provided to ensure safe operation of the system.
• The outputs may remain ON or OFF due to welding or burning of the
output relays or destruction of the output transistors. As a counter-
measure for these problems, external safety measures must be pro-
vided to ensure safe operation of the system.
• To ensure safe use of the Controller, correctly make the limit settings
for the position, speed, acceleration, jerk, current, and following error,
as well as the encoder loss detection.
• For devices that move in a vertical direction, use a motor brake to
prevent them from falling down when the servo control is stopped.
4 Installation
4-4
CK3M-series Programmable Multi-Axis Controller User's Manual Hardware (O036)

Omron CK3M Series Specifications

General

Brand	Omron
Model	CK3M Series
Category	Controller
Language	English