Safety Measures - Panasonic AFPE224300 User Manual

3.6 Safety Measures

3.6.1 Safety measures
System design
In applications in which FP-e is used, malfunctions may occur for the following reasons:
-Power on timing difference between the FP-e system and input/output or mechanical power devices.
-Response time lag when a momentary power failure occurs.
-Abnormality in the FP-e unit, external power supply, or other devices.
In order to prevent a malfunction resulting in system shutdown, take the adequate safety measures as listed
below:
- Interlock circuit
When a motor clockwise/counter-clockwise operation is controlled, provide an interlock circuit on the
outside of the FP-e unit.
- Emergency stop circuit
Add an emergency stop circuit on the outside of the FP-e unit to turn off the output devices in order to
prevent a system shutdown or an irreparable accident when malfunction occurs.
- Start up sequence
The FP-e should be operated after all of the input/output devices and power devices are energized.
Procedure:
-After power is supplied to the FP-e unit, switch the mode from PROG. to RUN.
-Install the timer circuit to delay the FP-e startup.
Note: When stopping the FP-e unit, the I/O devices should be turned off after the unit has stopped
operating.
- Secure grounding
When grounding the FP-e unit next to an inverter, or other such device that produces high-voltage due to
switching, avoid common grounding. Use an exclusive ground connection for each device.
3-16
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com