74 - 23/May/97
3.2.21 Command: IL - I Limit (Current Limit)
Function:
it allows to program the peak current. It is useful when
undersized motors are used or during special tests.
Syntax:
data monitoring:
n
address IL <CR>
data input:
n
address IL n <CR>
Address type:
axis
Unit of measure:
n = % max current
Range:
0 to 100
Default:
100
Password:
no
(
∗
) addressing:
no
Opposite to:
-
See also:
DL, AL
REMARK: before executing IL command it is necessary to perform DL command.
Examples:
n
2 IL <CR>:
it asks axis 2 about I limit. In default case the answer will be: "A2 CURRENT LIMIT % =
100".
n
2 IL 90 <CR>:
it sets 90% current limit for axis 2.
3.2.22 Command: IT - IT protection
Function:
it allows to manage the IT thermal protections which prevents the
motor from an overheating too quick for the PTC operating
time. When the integral of current multiplied by time exceeds the
IT value, drive limits, after operating time, to nominal motor
current (see Tab. 3.5).
Syntax:
data monitoring:
n
address IT <CR>
data input:
n
address IT xx n <CR>. xx = special password
Address type:
axis
Unit of measure:
n = ms
Range:
0 to 255. 0 = protection disabled
Default:
see Tab. 3.5
Password:
special password
(
∗
) addressing:
no
Opposite to:
-
See also:
PC
Notes:
IT protections has been implemented from software version 3.5.
IT status can be interrogated via FA command (bit g).
CAUTION: do not change IT parameter. A wrong set of IT can damage the motor.
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