Application Precautions - Omron SYSMAC CS Series Operation Manual

Application Precautions

5 Application Precautions
xiv
Observe the following precautions when using the Analog I/O Unit.
• If any one of cold junction compensating elements is disconnected, no
compensation will be performed, resulting in improper temperature mea-
surement. Do not disconnect cold junction compensating elements.
(Applicable to the CS1W-PTS01-V1 Isolated-type Thermocouple Input
Unit.)
• Each cold junction compensation element is calibrated for the individual
Unit and connected circuit; do not use elements from other Units or
replace two elements of the same Unit. Doing so will result in improper
temperature measurement. Use elements attached at the time of product
delivery. (Applicable to the CS1W-PTS01-V1 Isolated-type Thermocouple
Input Unit.)
• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera-
tion.
• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal
lines, momentary power interruptions, or other causes.
• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.
• Changing the operating mode of the PC.
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• Be sure that all the mounting screws, terminal screws, and cable connec-
tor screws are tightened to the torque specified in this manual. Incorrect
tightening torque may result in malfunction.
• Be sure that the terminal blocks, expansion cables, and other items with
locking devices are properly locked into place. Improper locking may
result in malfunction.
• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied in places where the power supply
is unstable. An incorrect power supply may result in malfunction.
• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dis-
sipation. Leaving the label attached may result in malfunction.
• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Connection of bare stranded wires may result in
burning.
• Do not apply voltages to the input section in excess of the rated input volt-
age. Excess voltages may result in burning.
• Do not apply voltages or connect loads to the output section in excess of
the maximum switching capacity. Excess voltage or loads may result in
burning.
• Double-check all wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.
• Resume operation only after transferring to the new CPU Unit the con-
tents of the DM Area, HR Area, and other data required for resuming
operation. Not doing so may result in an unexpected operation.
5