Hitachi SJ300 Series Run Time, Power-OnTime, Over Signals, Torque Limit Signal

4–54

Using Intelligent Output Terminals

Operations and Monitoring

Torque Limit Signal

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 criteria selected by parameter B040. When torque limiting occurs, the [TRQ] output turns ON, then going OFF automatically when the output torque falls below the specified limits. See “Torque Limit” on page 4–37 in the intelligent input section.

Opt.

Symbol

Function Name

Output

Description

Code

State

10

TRQ

Torque Limit

ON

when the inverter is limiting torque

OFF

when the inverter is not limiting torque

Valid for

11, 12, 13, 14, 15,

Example: (Requires output configuration—

outputs:

AL0 – AL2

see page 3–53.)

Required

B040... if B040=00 then

Inverter output

B041, B042, B043, B044 are

settings:

terminal circuit

required

TRQ

Notes:

• The Torque Limit input [TL] must be ON in

14

13

11

order to enable torque limiting and its related

output, [TRQ].

15

CM2

12

+

RY –

See I/O specs on page 4–9.

Run Time /Power-On TimeOver Signals

SJ300 Series inverters accumulate the total hours in Run Mode (run time) and the total hours of power-ON time. You can set thresholds for these accumulating timers. Once the threshold is exceeded, an output terminal will turn ON. One use of this is for preventative maintenance. A signal light or audible alert could signal the need for servicing, calibration, etc.

Opt.	Symbol	Function Name	Output	Description
Code			State
11	RNT	Run Time Over	ON	when the accumulated time spent in Run
				Mode exceeds the limit (B034)
			OFF	when the accumulated time in Run Mode
				is still less than the limit (B034)
12	ONT	Power-ON Time	ON	when the accumulated power-ON time
		Over		exceeds the limit (B034)
			OFF	when the accumulated power-ON time is
				less than the limit (B034)