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IP 266 Machine Data, Modes and Traversing Programs

Reference coordinate

The reference point is used to calibrate the axis. Its location can be specified via

the "Set/Approach to reference point" mode (see Section 5.3.5). The "reference

coordinate" machine data parameter is used to assign a value to this position.

The value must lie within the maximum range limits. When you define the

reference point coordinate, you also define the following coordinates:

• coordinate basic origin

• software limit switches

You can make absolute target specifications only in a system with a defined

reference point.

5.1.4 Speeds

The speeds specified in the machine data define the true speeds of the drive

system, and depend on

• the motor rotational speed

• the number of encoder pulses per revolution

• the travel per encoder revolution

The absolute values for all speeds must be less than or equal to the maximum

speed. Input values must be in the range from 1 to 65,000. Depending on the

parameter assignments, the IP expects values in [mm/min], [deg/min] or

[0.1 inch/min].

Maximum speed

Under IP 266 control, the drive reaches the maximum speed with a setpoint of

±10 V

CAUTION :

The maximum speed must be computed from the technical specifications for

the complete drive system (motor, axis, encoder, and so on).

EWA 4NEB 812 6057-02

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Siemens IP-Module Handbuch Seite 81