Hitachi SJ7002 Series Instruction Manual page 213

Torque Limit
The Torque Limit output [TRQ] works in conjunction with the torque limit function covered in
the intelligent input section. The torque limit function limits the motor torque according to the
Signal
criteria selected by parameter B040. When torque limiting occurs, the [TRQ] output turns ON,
then turns OFF automatically when the output torque falls below the specified limits. Note that
10
Opt. Code
the Torque Limit input [TL] must be ON in order to enable torque limiting and its related
[TRQ]
Symbol
output, [TRQ]. See
[11 to [15],
Valid for
Outputs [ALx]
B040... if
B040=00
Required
then set
Settings
B041, B042,
B043, B044
Default Requires
config.
terminals
Run Time /
SJ700
of power-ON time. You can set thresholds for these accumulating timers. Once the threshold is
Power-On Time
exceeded, an output terminal will turn ON. One use of this is for preventative maintenance. A
Over Signals
signal light or audible alert could signal the need for servicing, calibration, etc.
11=[RNT]
Opt. Code
and
12=[ONT]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
B034
Settings
The two outputs [RNT] and [ONT] share the same time threshold parameter, B034. Typically,
Default
Requires
config. you will use either the [RNT] or the [ONT] output only—not both at once. These outputs are
terminals
useful for the notification that a preventative maintenance interval has expired.
"Torque Limit" on page 4–30
Series inverters accumulate the total hours in Run Mode (run time) and the total hours
2
Symbol Function Name
RNT Run Time Over
ONT Power-ON Time Over
SJ700
2
in the intelligent input section.
Description
ON when the accumulated time spent in
Run Mode exceeds the limit (B034)
ON when the accumulated power-ON time
exceeds the limit (B034)
4–51
Inverter