SMC Networks LECSB Series, Руководство по эксплуатации

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11 - 2
11. CHARACTERISTICS
11. CHARACTERISTICS
11.1 Overload protection characteristics
An electronic thermal relay is built in the driver to protect the servo motor, driver and servo motor power line
from overloads. Overload 1 alarm (AL.50) occurs if overload operation performed is above the electronic
thermal relay protection curve shown in any of Figs 11.1. Overload 2 alarm (AL.51) occurs if the maximum
current flows continuously for several seconds due to machine collision, etc. Use the equipment on the left-
hand side area of the continuous or broken line in the graph.
In a machine like the one for vertical lift application where unbalanced torque will be produced, it is
recommended to use the machine so that the unbalanced torque is 70 or less of the rated torque.
When you carry out adhesion mounting of the driver, make circumference temperature into 0 to 45 (32 to
113 ), or use it at 75 or smaller effective load ratio.
Driver LECSB
□
-
□
series has solid-state servo motor overload protection. (The motor full load current is 115
rated current.)
1000
100
10
1
0.1
100 200 300 350 0
In servo lock
In operation
(Note 1, 2) Load ratio [ ]
50 150 250
O
pe
ra
ti
on
t
im
e
[
s
]
LECSB
□
-S5
(Note 1, 2, 3) Load ratio [ ]
1000
100
10
1
0.1
100 200 300 400 0
In servo lock
In operation
50 150 250 350
O
pe
ra
ti
on
t
im
e
[
s
]
LECSB
□
-S7, LECSB
□
-S8
Note 1. If operation that generates torque more than 100 of the rating is performed with an abnormally high frequency in a servo
motor stop status (servo lock status) or in a 30r/min or less low-speed operation status, the driver may fail even when the
electronic thermal relay protection is not activated.
Fig 11.1 Electronic thermal relay protection characteristics