Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 144 / 608

External operation Basic settings
5 - 32
5.3.2 Use switches to give a start command and a frequency command
(multi-speed setting) (Pr. 4 to Pr. 6)
Up to 15 set frequency values can be selected via terminals RH, RM, RL and REX of the frequency in-
verter. Manually operated switches or relay outputs of a programmable logic controller (PLC), for in-
stance, can be used.
●
Start command by terminal STF (STR)-PC.
●
Frequency command by terminal RH, RM, RL and STR-PC.
●
"EXT" must be lit. When "PU" is lit, switch it to "EXT" with the PU/EXT key.
●
The initial values of the terminals RH, RM, RL are 50 Hz, 30 Hz, and 10 Hz. Use Pr. 4, Pr. 5 and Pr. 6
to change.
●
Three set values can be selected by separately switching on the signals at terminals RH, RM and
RL. The fourth to seventh fixed frequencies are selected by combining the signals from these
inputs (see figure below). The set values are determined by parameters 24 to 27. The REX terminal
is used to select the 8th to 15th speed (refer to section. (Refer to section 6.6.1.)
I0001086E
Fig. 5-23: Frequency and start command by switches
I000004aC
Fig. 5-24: Multi-speed selection by external terminals
Power supply
Motor
Inverter
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
Output fr
equenc
y [H
z]
Speed 1 (high speed)
Speed 2
(middle speed)
Speed 3
(low speed)
Speed 4
Speed 5
Speed 6
Speed 7
ON
ON
ON
ON
ON
ON ON ON
ON ON
ON