Mitsubishi Electric FR-E700 Instruction Manual page 239

Parameter
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.
Pr. 450
Second Applied
Motor
9999
9999
9999
9999
Tab. 6-8:
¼
Output current value is used to perform integration processing.
Output current is assumed as 0 A to perform integration processing. (cooling processing)
— Electronic thermal relay function is not activated.
NOTE
The RT signal acts as the second function selection signal and makes the other second functions
valid. (Refer to section 6.10.3.)
FR-E700 SC EC/ENE
M
3~
M
3~
Pr. 9
Electronic Thermal
O/L Relay
0
0
0
0
Switching the electronic thermal O/L relay
Selection and protection of a motor
Fig. 6-37:
Running two motors by a single inverter
Pr. 51
Second Electronic
1. Motor 2. Motor 1. Motor 2. Motor
Thermal O/L Relay
9999 —
0 —
0.01–500 —
¼
9999
¼
0
¼
0.01–500
9999 —
0 —
0.01–500 —
¼
9999
¼
0
¼
0.01–500 (0.1–3600)
RT = OFF RT = ON
— —
— —
—
¼
—
—
— —
— —
—
—
I001137C
—
—
¼
—
—
¼
—
—
¼
¼
—
¼
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