Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 239 / 608

Parameter Selection and protection of a motor
FR-E700 SC EC/ENE 6 - 85
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 invert-
er. (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 pro-
vided based on the Pr. 51 setting.
For the terminal used for RT signal input, set "3" in any of Pr. 178 to Pr. 184 "Input terminal function se-
lection" to assign the function.
쐌
Output current value is used to perform integration processing.
왕
Output current is assumed as 0 A to perform integration processing. (cooling processing)
— Electronic thermal relay function is not activated.
Fig. 6-37:
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 —
왕
—
쐌
9999 0
9999
쐌
—
쐌
—
0
쐌
—
왕
—
0.01–500
쐌 왕 왕 쐌
9999 0
9999 — — — —
0 — — — —
0.01–500 —
왕
—
쐌
9999 0
9999
쐌 왕 왕 쐌
0
쐌
—
왕
—
0.01–500 (0.1–3600)
쐌 왕 왕 쐌
Tab. 6-8: 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 6.10.3.)
M
3~
M
3~