Synchronous Axis Technology Object - Siemens SIMATIC S7-1500 Function Manual

3.5

Synchronous axis technology object

The synchronous axis technology object follows the position change of a leading axis in
relative synchronous operation. A relative gearing exists, for example, when two
mechanically coupled rollers are driven by the same motor:
The change of the leading axis position setpoint is multiplied by a specified gear ratio and
passed on to the following axis as setpoint. The synchronous axis technology object outputs
this setpoint as speed setpoint to the drive limited to the maximum speed of the drive
(<TO>.Actor.DriveParameter.MaxSpeed).
The synchronous axis technology object includes all functions of the positioning axis
technology object. All movements of the synchronous axis occur under position control.
If the synchronous axis is operated without synchronous operation, the dynamic limits
configured at the technology object apply.
If the synchronous axis is operated as following axis in synchronous operation, the following
dynamic limits apply depending on the status of the synchronous operation.
● Synchronization
● Travel synchronous ("MC_GearIn.InGear" = TRUE)
The following hardware components are assigned to each synchronous axis:
● A drive by means of a PROFIdrive frame or by means of an analog setpoint interface
● An encoder by means of a PROFIdrive frame
Depending on the execution of the mechanics, a synchronous axis is implemented as linear
axis or rotary axis (Page 26).
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
Leading axis (driven axis)
Following axis
Relative position relationship
During synchronization, dynamic limits configured at the technology object apply to the
lead axis and the following axis respectively.
If the synchronous axis is operated as following axis, the dynamic limits of the leading
axis are multiplied by the gear ratio apply. The configured dynamic limits of the following
axis are ignored. The dynamic of the following axis is limited to the maximum speed of
the drive.
3.5 Synchronous axis technology object
Basics
23