Multi-Speed Setting) (Pr. 4 To Pr. 6) - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Basic settings
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 fre-
quency inverter. Manually operated switches or relay outputs of a programmable logic controller
(PLC), for instance, 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 50Hz, 30Hz, and 10Hz. 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 6.5.1).
Fig. 5-22: Frequency and start command by switches
RH
RM
RL
Fig. 5-23: Multi-speed selection by external terminals
FR-D700 SC EC
Power supply
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
Speed 1 (high speed)
Speed 2
(middle speed)
Speed 3
(low speed)
ON
ON
ON
Inverter
Motor
Speed 5
Speed 6
Speed 4
ON ON
ON ON
ON
External operation
I0001086E
Speed 7
t
ON
ON
ON
I000004aC
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