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Positioning IP 240

b) Approaching the target position in negative direction

The axis is at 1600 increments when the position is selected. The axis must travel in the nega-

tive direction at the rapid traverse rate.

• When the actual value is 1300, the traverse rate is switched to creep speed.

• When the actual value is 1100, the drive is switched off.

• When the actual value is 1070, the target range has been reached.

The IP 240 monitors the actual value range 1070 to 930, and signals exiting of this target

range without a new position having been selected.

700 1000 1300

Actual value

Traverse

range

Starting positionTarget position

Range BEE1

Range BEE2 Range BEE3

1600900 1100

Approaching the position in a negative direction

Position 0

In addition to positions 1 to 254, you can also use position 0.

Position 0 is not stored on the IP 240. To define this position, you must transfer the new position

value to the IP 240. This position can also be selected when the channel's IP outputs are still set.

This allows you to intervene in a positioning process that is already in progress.

When position 0 is selected, the IP 240 immediately takes the new position value as setpoint and

updates the status bits and the states of the outputs.

Table 10-2. Selecting Positions 0 - 254

Position Is selected by Note

Transferring the

position value

This postion can also be selected when the IP outputs

are set.

1 to 254

Transferring the

position number

These positions may be selected only when the IP out-

puts are disabled.

Axis types and actual value ranges

You can operate the IP 240 with a linear axis (limited traverse range) and a rotary axis (rotary

table, endless conveyor belt). The required axis type is specified during configuring.

10-6

EWA 4NEB 811 6120-02a

1 2 ... 167 168 169 170 171 172 173 174 175 176 177 ... 416 417

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Siemens IP-Module Especificaciones Pagina 172