Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 136 / 608

PU operation mode Basic settings
5 - 24
5.2.3 Use switches to give the frequency command (multi-speed setting)
In frequency inverters of the FR-E700 SC series up to 15 frequency setpoints (and thus rpms and
speeds) can be selected via the RH, RM, RL and REX terminals. Manually activated switches or relay
outputs of a programmable logic controller (PLC), for example, can be used to select a frequency.
●
Pr. 79 "Operation mode selection" must be set to "4" (external/PU combined operation mode 2).
●
Use the RUN key to give a start command.
●
The initial values of the terminals RH, RM, RL are 50 Hz, 30 Hz, and 10 Hz. (Refer to section 5.3.2 to
change frequencies using Pr. 4, Pr. 5 and Pr. 6.)
●
Three setpoints can be selected by separately switching on the signals to the RH, RM and RL
terminals. The selection of the fourth to the seventh fixed frequency is possible through the
combination of signals of these inputs (see diagram below). The setpoints are determined by
parameters 24 to 27. The REX terminal is used to select the 8th to the 15th rpm/speed (section
6.6.1).
I001769E
Fig. 5-14: Use switches to give the frequency command
I000004aC
Fig. 5-15: Multi-speed selection by external terminals
Power supply
Motor
Inverter
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