Fuji Electric FRENIC-HVAC User Manual page 405

Typical operation sequence of RE
(1) A run command FWD is given to the inverter.
(2) When the inverter gets ready for running, it outputs an AX2 signal ("Run command
entered").
(3) Upon receipt of the AX2, the upper equipment gets ready to operate the peripherals (e.g.,
opening a damper).
(4) Upon completion of preparation of the peripherals, the upper equipment gives an RE
signal ("Enable run command") to the inverter.
(5) Upon receipt of the RE, the inverter starts running.
Protect motor from dew condensation -- DWP (Function code data = 39)

Turning this terminal command ON supplies a DC current to the motor in a stopped state in
order to generate heat, preventing dew condensation.
 Refer to J21.
Enable integrated sequence to switch to commercial power for 50 Hz and 60 Hz

-- ISW50 and ISW60 (Function code data = 40 and 41)
With the terminal command ISW50 or ISW60 assigned, the inverter controls the magnetic
contactor that switches the motor drive source between the commercial power and the
inverter output according to the integrated sequence.
This control is effective when not only ISW50 or ISW60* has been assigned to the input
terminal but also the SW88 and SW52-2 signals have been assigned to the output terminals.
(It is not essential to assign the SW52-1 signal.)
* The ISW50 or ISW60 should be selected depending upon the frequency of the commercial
power; the former for 50 Hz and the latter for 60 Hz.
 For details about SW88 and SW52-2 ("Switch motor drive source between commercial
power and inverter output"), refer to E20 to E27.
For details of these commands, refer to the circuit diagrams and timing schemes on the
following pages.
Terminal command assigned
ISW50
Enable integrated sequence to switch to
commercial power (50 Hz)
ISW60
Enable integrated sequence to switch to
commercial power (60 Hz)
Do not assign both ISW50 and ISW60 at the same time. Doing so cannot guarantee
the result.
6.3 Details of Function Codes
(Switching from commercial power to inverter)
Start at 50 Hz.
Start at 60 Hz.
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Operation