Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 20

Application Precautions
• Do not apply voltages or connect loads to the Output Units in excess of
the maximum switching capacity.
• Do not apply voltages to the Input Units in excess of the rated value.
• After replacing a CPU Unit or Special I/O Unit, resume operation only
after transferring to the new CPU Unit or Special I/O Unit the contents of
the DM Area, HR Area, and other data required for resuming operation.
• Check the user program for proper execution before actually running it
with the system.
• Observe the following precautions when wiring the communications
cables.
• Wire the communications cables separately from the power lines or
high-tension lines.
• Do not bend the communications cables excessively.
• Do not pull on the communications cables excessively.
• Do not place objects on top of the communications cables.
• Route communications cables inside ducts.
• Confirm that the system will not be adversely affected before performing
the following operations.
• Changing the operating mode of the PLC
• Setting/resetting any bit in memory
• Changing the present value of any word or any set value in memory
• Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static build-up.
• When replacing parts, such as a relay, make sure the replacement part
has the correct specifications.
• Be sure that metal filings do not enter the Unit when wiring or installing.
• Use correct parts for wiring.
• Use the specified communications cables and connectors.
• Always enable the scan list before operation.
• Before clearing the scan list of a Unit that has user-allocated remote I/O,
always confirm that no errors occur after the I/O Area setting is changed
to fixed allocation.
• When adding a new node to the network, check that the new node's baud
rate is the same as the baud rate set on the other nodes.
• Do not extend connection distances beyond the ranges given in the spec-
ifications.
• Although the Environment-resistive Slaves have IP67 enclosure ratings,
do not used them in applications where the Slave is always submerged in
water.
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