Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Parameter Selection and protection of a motor
FR-D700 SC EC 6 - 69
Set two different electronic thermal O/L relays (Pr. 51)
Use this function when running two motors of different rated currents individually by a single in-
verter. (When running two motors together, use external thermal relays.)
Set the rated current of the second motor to Pr. 51. When the RT signal is on, thermal protection
is provided based on the Pr. 51 setting.
For the terminal used for RT signal input, set "3" in any of Pr. 178 to Pr. 182 to assign the function.
Output current value is used to perform integration processing.
Output current is assumed as 0A to perform integration processing. (cooling processing)
— Electronic thermal relay function is not activated.
Fig. 6-34:
Running two motors by a single inverter
I001137C
Pr. 450
Second applied
motor
Pr. 9
Electronic thermal
O/L relay
Pr. 51
Second electronic
thermal O/L relay
RT = OFF RT = ON
1. Motor 2. Motor 1. Motor 2. Motor
9999 0
9999 — — — —
0 — — — —
0.01–500 — —
9999
≠
0
9999 — —
0 — —
0.01–500
≠
9999 0
9999 — — — —
0 — — — —
0.01–500 — —
≠
9999
≠
0
9999
0 — —
0.01–500 (0.1–3600)
Tab. 6-5: Switching the electronic thermal O/L relay
NOTE
The RT signal acts as the second function selection signal and makes the other second
functions valid. (Refer to section 6.9.3.)
M
3~
M
3~