Omron CX-PROGRAMMER V9 - REV 12-2009 Operation Manual page 12

OMRON
Caution
Caution
Caution
Caution
Caution
External power
supply
FG
Confirm safety at the destination node before transferring a program to
another node or changing contents of the I/O memory area. Doing either of
these without confirming safety may result in injury.
Execute online edit only after confirming that no adverse effects will be
caused by extending the cycle time. Otherwise, the input signals may not
be readable.
If synchronous unit operation is being used, perform online editing only
after confirming that an increased synchronous processing time will not
affect the operation of the main and slave axes.
Confirm safety sufficiently before monitoring power flow and present value
status in the Ladder Section window or when monitoring present values in
the Watch window. If force-set/reset or set/reset operations are
inadvertently performed by pressing short-cut keys, the devices connected
to Output Units may malfunction, regardless of the operating mode of the
CPU Unit.
Caution is required when connecting peripheral devices, such as a
personal computer, to the PLC when Units with non-isolated power
supplies, such as the CS1W-CLK12/CLK52(-V1), that are connected to an
external power supply are mounted to the PLC. If the 24-V side is grounded
on the external power supply, a short will be created if the 0-V side of the
peripheral device is grounded. When connecting peripheral devices, either
ground the 0-V side of the external power supply or do not ground the
external power supply at all.
Non-isolated
power supplies
24-VDC
0-VDC
0-VDC
Controller Link unit
CX-Programmer – Operation Manual
Cable
FG
FG
CPU unit
0-VDC
FG
Peripheral devices
CX-Programmer_Page (
ix
)