Omron CK3M Series User Manual page 17

Safety Precautions
The UPS used enables normal operation to continue for a certain period of time if a
momentary power interruption occurs. This means that the CK3M-series Controller
may receive incorrect signals from external devices that are also affected by the power
interruption. Accordingly, take suitable actions, such as establishing external fail-safe
measures and interlock conditions, to monitor the power supply voltage of the external
device as required.
Unintended outputs may occur if an error occurs in internal data of the Controller. As a
countermeasure for these problems, external safety measures must be provided to en-
sure safe operation of the system.
The Controller will turn OFF all outputs of output units in the following cases and the
slaves will operate according to the settings in the slaves.
• If a power supply error occurs
• If the connected power supply is faulty
• If a CPU Unit error (watchdog timer error) or CPU Unit reset occurs
• If a major fault level Controller error occurs
• While the Controller is on standby until RUN mode is entered after the power is
turned ON
• If a system initialization error occurs
External safety measures must be provided to ensure safe operation of the system in
such cases.
The outputs may remain ON or OFF due to welding or burning of the output relays or
destruction of the output transistors. As a countermeasure for these problems, external
safety measures must be provided 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 de-
tection.
For devices that move in a vertical direction, use a motor brake to prevent them from
falling down when the servo control is stopped.
Downloading
Always confirm safety at the destination before you transfer a user program, configura-
tion data, or setup data from the Power PMAC IDE.
The devices or machines may perform unexpected operation regardless of the operat-
ing mode of the Controller.
After you transfer the user program, the Controller is restarted and communications
with the EtherCAT slaves are cut off. During that period, the slave outputs behave ac-
cording to the slave specifications.
The time that communications are cut off depends on the EtherCAT network configura-
tion.
Before you transfer the user program, confirm that the system will not be adversely af-
fected.
Test Run
Before you start a Test Run, make sure that the operation parameters are set correctly.
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CK3M-series Programmable Multi-Axis Controller User's Manual Hardware (O036)