Emerson FM-3 manual AccelUnits.Decimal, AccelUnits.TimeScale, AtVel

FM-3 Programming Module Reference Manual

Acceleration Decimal Places

AccelUnits.Decimal

This parameter is the decimal point location for all real-time accel./decel. ramps.

Acceleration Time Scale

AccelUnits.TimeScale

This parameter is the time units for accel./decel. ramps. Possible selections are milliseconds or seconds.

At Velocity

AtVel

This source is active when the FM-3 module is executing a constant velocity motion segment. One example would be during an index. The source would activate after the motor has finished accelerating up to speed and before the motor begins to decelerate to a stop. A normal index consists of 3 segments: Accelerating, At Velocity, and Decelerating. This source is active during the At Velocity segment, and is activated based on the commanded velocity, not the feedback velocity. During synchronized motion, AtVel can be active without actual motor movement.

Bit Number Value

Bit.B#

This read/write bit may be used in a program as an intermediary variable bit controlled by the user. Bit.B# is one of 32 bits that make up the BitRegister parameter. Assigned to communication networks such as DeviceNet, Profibus and Modbus, Bit.B# may be used to transfer events that have occurred in a PLC to the FM-3/4 program.

Note

When the value of Bit.B# is changed, the value of BitRegister.#.Value is changed as well.

Bit Register Number Value

BitRegister.#.Value

This parameter is made up of the combination of the 32 Bit.B#. The BitRegister.#.Value. The BitRegister.#.Value register may be accessed bitwise by using Bit.B#, or double word-wise by using BitRegister.#.Value.

144