Siemens SINUMERIK 840DE SL - 2.2.2 Activation; 2.2.2.1 Parameterization; 2.2.3 Programming

Detailed Description
2.2 Constant travel time (channel-specific)
Acceleration (B2)
2-6 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
1: Characteristic with constant travel time
2: Characteristic without constant travel time
a
max
: Maximum acceleration value
v
max
: Maximum velocity value
t: Time
The effect of the constant travel time can be seen from the figure above:
• Time: t
1
End of acceleration phase with sudden acceleration 1 * a
max
• Interval: t
1
- t
2
Acceleration 0; constant velocity using the parameterized constant travel time
• Time: t
2
Start of braking phase with sudden acceleration 1 * a
max
The times t
0
, t
1
' and t
2
' indicate the characteristic that would have been produced had no
constant travel time been defined.
2.2.2 Activation
2.2.2.1 Parameterization
Key statement
The constant travel time is parameterized for specific channels using machine data:
MD20500 $MC_CONST_VELO_MIN_TIME
(minimum time with constant velocity)
2.2.3 Programming
Key statement
The function is not programmable.