Siemens SINUMERIK 840Di sl Function Manual page 90

Detailed description
2.4 Actions in synchronized actions
Detection of synchronism
System variable $AA_SYNC[ax] can be read from the parts program and synchronous action
and indicates whether and in what manner the following axis FA is synchronized:
0: Not synchronized
1: Coarse synchronism (according to MD37200 $MA_COUPLE_POS_TOL_COARSE)
2: Fine synchronism (according to MD37210 $MA_COUPLE_POS_TOL_FINE)
Definition of application
Couplings directly activated in the part program are activated at block limits. With the
additional option of activating couplings from synchronized actions, it is possible to
implement event-controlled, differential activation, e.g.
• from block beginning for specific axis path
• up to block end for specific distance-to-go
• appearance of digital input signals or
• combinations of these.
For more information about programming coupling functions and curve tables, please see:
References:
/PGA/Programming Manual Advanced
Note
Axes, which might be in any given motional state at the instant they are coupled via
synchronized actions, are synchronized by the control system. You can find details about
this in /FB3/ Function Manual Special Functions; Axis Couplings and ESR (M3).
Examples
You can find an example of axis coupling using curve tables in Subsection 6.7.3 "On-the-Fly
Parting".
• Generic coupling - activate coupling module in synchronized actions
90
See Chapter "Components of synchronized actions", Conditions
It is possible to program keywords in synchronized actions. In this way, coupling modules
can also be used in synchronized actions. When the coupling module is activated in a
synchronized action, the following axis must already be active in the channel and be in
the state "neutral axis " or "axis already assigned to the NC-program of the channel".
When required, this axis state must be provided before the activation of the coupling
module. This can also be done in synchronized actions with the help of the command
GET [Axis].
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
Synchronized actions