Machine Protection
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45
Changing Stall Prevention Level during Operation Using an Analog Input
If you set H3-09 (Multi-function Analog Input Terminal A2 Function Selection) or H3-05 (Multi-function
Analog Input Terminal A3 Function Selection) to 8 (stall prevention level during run), you can change the stall
level during operation by setting H3-10 (Gain (Terminal A2)) and H3-11 (Bias (Terminal A2)) or H3-06 (Gain
(Terminal A3)) and H3-07 (Bias (Terminal A3).
The stall prevention level during operation enabled is the multi-function analog input terminal A2 or A3 input
level or the set value in parameter L3-06, whichever is the smaller.
Fig 6.37 Stall Prevention Level during Operation Using an Analog Input
Detecting Motor Torque
If an excessive load is placed on the machinery (overtorque) or the load is suddenly lightened (undertorque),
you can output an alarm signal to multi-function output terminal M1-M2, M3-M4, M5-M6, P3-C3, or P4-C4.
To use the overtorque/undertorque detection function, set B, 17, 18, 19 (overtorque/undertorque detection NO/
NC) in one of the following parameters: H2-01 to H2-05 (multi-function output terminals M1-M2, P1-PC, P2-
PC, P3-C3, and P4-C4 function selection).
The overtorque/undertorque detection level is the current level (Drive rated output current 100%) in V/f con-
trol, and the motor torque (motor rated torque 100%) in vector control.
INFO
If the motor capacity is smaller than the Drive capacity or the motor stalls when operating at the factory set-
tings, lower the stall prevention level during operation.
Stall prevention level during operation
Multi-function analog input
terminal A2, A3 input level
(4 mA) (8.8 mA) (20 mA)
