Siemens SIMATIC S7-300 Manual page 277

Sample program- The following figure shows a sample program with the programming flow.
ming (standard
case)
V
1 – Block N10 is started at the point of deceleration of N5.
2 – N15 is started at the point of deceleration of N10. Acceleration to the
3 – N20 is started at a lower traversing speed at the braking point of N15.
4 – In a change of traversing direction, the axis brakes until it comes to a
5 – When the target range is reached, the axis accelerates in the opposite
To be able to approach a position correctly, the axis must calculate the point
of deceleration. The relevant parameters for this calculation are the residual
traversing distance, the deceleration value and the current traversing speed.
The point of deceleration is also the earliest possible time for a block change.
FM 354 Servo Drive Positioning Module
/ N G1 G2 G3
5 90 64
10
15
20
25 64
N5 N10 N15
1
2
higher traversing speed begins when the set position of N10is reached.
standstill and waits until the actual value of the encoder has reached the
target range.
direction up to the traversing speed of the new block.
Writing Traversing Programs
X/t F M1 M2
10 000 100 00
20 000
30 000 200 00
40 000 150 00
30 000 100 00
N20 N25
3
4
5
M3 D
t
10-17