EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

Related function codes
Function
code
Name
V/f control
Vector
control
F40 Torque Limiter 1-1 Y Y
F41 Torque Limiter 1-2 Y Y
E16 Torque Limiter 2-1 Y Y
E17 Torque Limiter 2-2 Y Y
H73
Torque Limiter (Operating
conditions)
Y
Y
H74 Torque Limiter (Control target) N Y
H75 Torque Limiter (Target quadrants) N Y
H76
Torque Limiter
(Frequency increment limit for
Y
N
braking)
E61 to E63
Terminal [12] Extended Function
Terminal [C1] Extended Function
Terminal [V2] Extended Function
Y
Y
Remarks
7: Analog torque limit value A
8: Analog torque limit value B
• Torque limit control mode
Torque limit is performed by limiting torque current flowing across
the motor.
The graph below shows the relationship between the torque and the
output frequency at the constant torque current limit.
• Torque limiters 1-1, 1-2, 2-1 and 2-2 (F40, F41, E16 and E17)
Data setting range: -300 to 300 (%), 999 (Disable)
These function codes specify the operation level at which the torque
limiters become activated, as the percentage of the motor rated torque.
Function code Name Torque limit feature
F40 Torque limiter 1-1 Driving torque current limiter 1
F41 Torque limiter 1-2 Braking torque current limiter 1
E16 Torque limiter 2-1 Driving torque current limiter 2
E17 Torque limiter 2-2 Braking torque current limiter 2
Although the data setting range for F40, F41, E16, and E17 is from positive to negative values (–300% to
+300%), specify positive values in practice. Specifying a negative value causes the inverter to interpret it
as an absolute value.
The torque limiter determined depending on the overload current actually limits the torque current output.
Therefore, the torque current output is automatically limited at a value lower than 300%, the maximum
setting value.
• Analog torque limit values (E61 to E63)
The torque limit values can be specified by analog inputs through terminals [12], [C1], and [V2] (voltage or current).
Set E61, E62, and E63 (Terminal [12] Extended Function, Terminal [C1] Extended Function, and Terminal [V2]
Extended Function) as listed below.
Data for E61, E62, or E63 Function Description
7 Analog torque limit value A Use the analog input as the torque limit value
specified by function code data (= 7 or 8).
8 Analog torque limit value B Input specifications: 200% / 10 V or 20 mA
If the same setting is made for different terminals, the priority order is E61>E62>E63.
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