EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

• Torque limiter levels specified via communications link (S10, S11)
The torque limiter levels can be changed via the communications link. Function codes S10 and S11 exclusively
reserved for the communications link respond to function codes F40 and F41.
• Switching torque limiters
The torque limiters can be switched by the function code setting and the terminal command TL2/TL1 ("Select
torque limiter level 2/1") assigned to any of the digital input terminals.
To assign the TL2/TL1 as the terminal function, set any of E01 through E07 to "14." If no TL2/TL1 is assigned,
torque limiter levels 1-1 and 1-2 (F40 and F41) take effect by default.
• Torque limiter (Operating conditions) (H73)
H73 specifies whether the torque limiter is enabled or disabled during acceleration/deceleration and running at
constant speed.
Data for H73 During accelerating/decelerating During running at constant speed
0 Enable Enable
1 Disable Enable
2 Enable Disable
• Torque limiter (Frequency increment limit for braking) (H76)
Data setting range: 0.0 to 500.0 (Hz)
H76 specifies the increment limit of the frequency in limiting torque for braking. The factory default is 5.0 Hz. If the
increasing frequency during braking reaches the limit value, the torque limiters no longer function, resulting in an
overvoltage trip. Such a problem may be avoided by increasing the setting value of H76.
The torque limiter and current limiter are very similar in function. If both are activated concurrently, they
may conflict with each other and cause hunting (undesirable oscillation of the system). Avoid concurrent
activation of these limiters.
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