Basic settings
External operation
FR-D700 SC EC
5 - 33
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).
I0001086E
Fig. 5-22:
Frequency and start command by switches
I000004aC
Fig. 5-23:
Multi-speed selection by external terminals
Power supply
Motor
Inverter
Forward rotation start
Reverse rotation start
High speed
Middle speed
Low speed
t
RH
RM
RL
Output frequency [Hz]
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
Summary of Contents for FR-D720S SC EC
Page 2: ......
Page 4: ......
Page 24: ...Description of the case Product checking and part identification 1 4 ...
Page 108: ...Operation panel Operation 4 20 ...
Page 436: ...Setting for the parameter unit and operation panel Parameter 6 286 ...
Page 484: ...Measurements on the main circuit Maintenance and inspection 8 14 ...
Page 504: ...Specification change Appendix A 20 ...
Page 505: ......
Page 506: ......
Page 510: ...Index Appendix A 24 ...
Page 511: ......