The Ip Outputs Control The Traversing Speed; Outputs Are Set Separately; Outputs Are Set Collectively; The Ip Outputs Control The Direction Of Travel - Siemens Simatic S5 IP 240 Manual

Positioning
10.5.2
When you configure DAV=0 or DAV=1, you pass control of the traversing speed to the IP
outputs. The outputs are switched without regard to the direction of travel.
a) Outputs are set separately (DAV=0)
After the target position has been selected ( Fig. 10-12a: Actual value 1000), the IP 240 sets
output D1 in dependence on the actual value. When range BEE1 is entered (actual
value 2000), output D1 is reset and output D2 set. When range BEE2 is reached (actual
value 3000), output D2 is reset.
b) Outputs are set collectively (DAV=1)
When the target position has been selected ( Fig. 10-12b: Actual value 1000), the IP 240 sets
inputs D1 and D2 in dependence on the actual value. Output D1 is reset when range BEE1
(actual value 2000) is entered, output D2 when range BEE2 (actual value 3000) is entered.
Positive direction of travel
Selection of
the target
position
Sample
1000
actual
value
Position
valid
Output
D1
Output
D2
Fig. 10-12a. Switching Performance of the
IP Outputs when DAV=0
To define the direction of travel, you can scan status bit RICH (direction) on the IP 240 on a one-
shot basis after selecting the position and use it to control two additional PLC digital outputs via
the S5 CPU.

10.5.3 The IP Outputs Control the Direction of Travel

When you choose this option, the IP outputs are allocated to the direction of travel.
When the target position is selected, the IP 240 computes the direction of travel from the actual
value and the position value for the target position and sets one of the IP outputs.
Output D1 is set if positive travel (ascending actual value) is required (
value 1000).
Output D2 is set if negative travel (descending actual value) is required (
value 6000).
The output that was set is reset when range BEE2 is entered (Fig. 10-13a: Actual value 3000,
Fig. 10-13b: Actual value 4000).
10-18

The IP Outputs Control the Traversing Speed

Switching Position
points for the value for the
target position target position
BEE1 BEE2
2000 3000 3200
Positive direction of travel
Selection of Switching
the target points for the
position target position
BEE1
1000 2000
Fig. 10-12b. Switching Performance of the
IP Outputs when DAV=1
IP 240
Position
value for the
target position
BEE2
3000 3200
Fig. 10-13a: Actual
Fig. 10-13b: Actual
EWA 4NEB 811 6120-02a