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5
Application Precautions
xiii
•
Locations subject to corrosive or flammable gases.
•
Locations subject to dust (especially iron dust) or salts.
•
Locations subject to shock or vibration.
•
Locations subject to exposure to water, oil, or chemicals.
•
Take appropriate and sufficient countermeasures when installing systems in
the following locations.
•
Locations subject to static electricity or other forms of noise.
•
Locations subject to strong electromagnetic fields.
•
Locations subject to possible exposure to radioactivity.
•
Locations close to power supplies.
Caution
The operating environment of the PLC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PLC
System. Be sure that the operating environment is within the specified condi-
tions at installation and remains within the specified conditions during the life of
the system.
5
Application Precautions
Observe the following precautions when using the PLC.
WARNING
Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
•
Always ground the system to 100
Ω
or less when installing the system to pro-
tect against electrical shock.
•
Always turn off the power supply to the PLC before attempting any of the fol-
lowing. Performing any of the following with the power supply turned on may
lead to electrical shock:
•
Mounting or removing any Units.
•
Assembling any Unit.
•
Connecting or disconnecting any cables or wiring.
Caution
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.
Caution
Tighten the screws on the terminal block of the AC Power Supply Unit to the
torque specified in this manual. The loose screws may result in short-circuit,
malfunction, or burning.
Caution
Always clear memory before beginning to program the CPM1A. Although
memory is cleared before the CPU Unit is shipped (except for bits with specific
functions), AR 1314, which turns ON when the internal capacitor cannot back up
memory, may have turned ON during shipment.
Caution
If the CPM1A will be turned off for periods exceeding the data backup period of
the internal capacitor, design the system so that it will not be influenced if data in
the DM, HR, and CNT areas is cleared when power is turned off.
Caution
Either switch the CPM1A to RUN or MONITOR mode, or turn off and on power to
the CPM1A after changing from a Programming Device any data that is backed
up in flash memory. This data includes the user program, read-only DM area
(DM 6144 to DM 6599), and the PC Setup (DM 6600 to DM 6655).
Summary of Contents for CPM1A-20CAR-A
Page 3: ...ii...
Page 5: ...iv...
Page 9: ...iv...
Page 29: ...14 System Configuration Section 1 2...
Page 43: ...29 Unit Components Section 2 2...
Page 65: ...51 Wiring and Connections Section 3 4...
Page 123: ...Appendix B Dimensions 2 CPM1 CIF01 90 81 21 30 205 50 56 CPM1 CIF11 90 81 21 30 205 50 61...
Page 124: ...Appendix B Dimensions 3 Dimensions with Peripheral Devices Attached Approx 90 Approx 125...
Page 125: ...Appendix B Dimensions 4...
