Acceleration Rates - Siemens SIMATIC S5 Manual

IP 266
5.1.5

Acceleration Rates

In order to reach the speed initialized for the specified mode, the drive must
accelerate.
The following five values may be entered in the machine data:
• Maximum deceleration rate
• Forward acceleration rate
• Forward deceleration rate
• Reverse acceleration rate
• Reverse deceleration rate
The absolute maximum deceleration rate must be greater than or equal to all
other acceleration or deceleration rates.
This deceleration rate is used to stop travel
• when the drive has reached a hardware limit switch or
• when an external Stop command was issued.
The values must be in the range from 10 to 9 999. The entry must be in [mm/s
2 2
[deg/s ] or [0.1 inch/s ].
Example 1:
This example illustrates the use of the various acceleration and deceleration rates
in normal operation.
v
for
[ ]
mm
/
min
v
rev
Forward acceleration
Constant speed forward
Reverse deceleration
Figure 5-4. Acceleration and Deceleration of the Drive System
in Both Directions
EWA 4NEB 812 6057-02
Machine Data, Modes and Traversing Programs
Reverse acceleration
Constant speed in reverse
Reverse deceleration
2
],
t
5-11