Siemens SINUMERIK 840C Installation Instructions Manual page 686

09.95
Trigger conditions for starting the recording can be set in the field marked "Trig-
ger". The following settings are provided:
S
S
S
S
S
The start of recording can be set in the field marked "Trigger time". Pre-trigger
("Trigger time" < 0) and post-trigger ("Trigger time"  0) settings can be entered
here. If the measurement has commenced and the trigger condition is fulfilled
before the set pre-trigger time has elapsed, then the pre-trigger range is dis-
played in an appropriately shortened form in the measurement curve.
The trace functions are initiated through selection of softkey Start. This key starts
all trace functions with valid signal selection. When the function is activated, the
recording is started internally in a ring buffer store. The relevant trace buffers are
then filled when the trigger condition is fulfilled with allowance made for the trig-
ger time (pre-/post-trigger times).
The trace function is terminated if
S
S
S
Note "Trigger time" and "Measurement time" of traces 2 – 4 (applies only when "No
trigger" setting is selected) are linked to the start trigger of trace 1.
A new input parameter has been integrated from SW 5 for selecting channel and
IKA number (see Fig. 9.35).
Siemens AG 2001 All Rights Reserved 6FC5197–jAA50
SINUMERIK 840C (IA)
No trigger 8 default setting for trace 1

Edge signal threshold8

Edge signal threshold8
8
PLC trigger Recording starts if PLC trigger signal (1 to 4)
switches from 0 to 1 (the 4 trigger signal are preas-
signed to the 4 trace buffers).
DB48 DR2 bit 0 ... 3
Startt rigger trace 1 8
The start trigger of trace 1 is used
(default setting for as the start trigger condition. Traces 2-4)
the trace buffer is full (allowing for pre-/post-trigger) or
the measurement time has elapsed or
the Stop softkey is actuated.
9 Drive Servo Start-Up Application (as from SW 3)
9.6 SERVO trace (SW 4)
Recording starts if selected signal is greater
than set "threshold" (edge transition)
Recording starts if selected signal is smaller
than set "threshold" (edge transition)
9–65