Auxiliary functions (Pr. 156, Pr. 157)
1. When "Operation not continued for OL signal output" is selected, the "E. OLT" alarm code (stopped
by stall prevention) is displayed and operation stopped.
(Alarm stop display "E. OLT")
2. For the lift application, make setting to disable high-response current restriction.
Otherwise the torque may not be generated, resulting in the lift drop with gravity.
3. When the setting value is "101", high-response current restriction at driving is well disabled
compared to when "100" is set.
Always perform test operation.
Stall prevention operation performed during acceleration may increase the acceleration time.
Stall prevention operation performed during constant speed may cause sudden speed changes.
Stall prevention operation performed during deceleration may increase the deceleration time,
increasing the deceleration distance.
4.17.2 OL signal output timer (Pr. 157
Use this parameter to set whether the overload alarm signal (OL signal) is output immediately or a preset
period of time after occurrence of an overload status.
OL signal output timer
V/F control .......... On when stall prevention operation level is exceeded.
Speed control ......On when torque restriction is activated.
Torque control ..... On when speed restriction is activated.
Position control ... On when torque restriction is activated.
Refer to the following table and set the parameter.
Pr. 157 Setting
0.1 to 25
Output after the set time (s) has elapsed.
Overload alarm signal is not output.
• OL signal terminal assignment ⇒ Set 3 in any of Pr. 190 to Pr. 192, Pr. 195 (output terminal function selection). (Refer to page 165.)
Refer to Pr. 54 (page 110).
0 to 25s, 9999
9999: No signal output
OL output signal
Set time (s)