Ramping Function; Velocity Ramp Example - Siemens SIMATIC 505 User & Programmers Manual

5.4

Ramping Function

5.4.1
Velocity Ramp
Example
5-10 Selected Functions
The TurboPlastic module provides a ramping function for both velocity and
pressure control functions during open loop operation of all profiles. The
ramping function is activated by setting appropriate bits in Constant 10 in
the download table of each profile.
In normal open loop operation, the setpoints are output as step changes for
both pressure and velocity. With the ramping function activated instead of
the step function output, the output varies on a slope or ramp that increases
or decreases proportionally from the starting position to the position in the
next step in the profile table. Figure 5-3 shows the open loop output without
ramping and Figure 5-4 shows the open loop output with ramping.
Current
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Clamp Close Profile Table
Position Velocity
6 in
5 in
4 in
3 in
2 in
1 in
0 in
Pressure
3 ips 1200 psi
8 ips 1800 psi
2 ips 1200 psi
6 ips 1500 psi
6 ips 1500 psi
1 ips 600 psi