Siemens sinumerik 840d Programming Manual page 179

04.00
5
840D 840D
NCU 571 NCU 572
NCU 573
Trigger events
A trigger event comprises the number of the probe
and the trigger criterion (rising or falling edge) of the
measuring signal.
Up to 4 trigger events of the addressed probe can be
processed for each measurement, i.e. up to two probes
with two measuring signal edges each.
The processing sequence and the maximum number of
trigger events depends on the selected mode.
The same trigger event is only permitted to be
programmed once in a measuring job (only applies
to mode 1)!
Operating mode
The first digit in the mode setting selects the desired
measuring system. If only one measuring system is
installed, but a second programmed, the installed
system is automatically selected.
With the second digit, i.e. the measurement mode,
measuring process is adapted to the capabilities of
the connected control system:
• Mode 1: Trigger events are evaluated in the
chronological sequence in which they occur.
When this mode is selected, only one trigger
event can be programmed for six-axis modules. If
more than one trigger event is specified, the
mode selection is switched automatically to mode
2 (without message).
• Mode 2: Trigger events are evaluated in the
programmed sequence.
• Mode 3: Trigger events are evaluated in the
programmed sequence, however
no monitoring of trigger event 1 at START.
Additional notes
No more than 2 trigger events can be programmed if 2
measuring systems are in use.
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
5.7 Extended measuring function MEASA, MEAWA, MEAC
810D 840Di
CCU 2
Special Motion Commands
5
5-179