Page 64
Advanced Settings
confocalDT 24x1
6.9.4
Maximum Value
If the encoder exceeds the maximum value, the counter is reset to zero. Examples in-
clude rotary pulse indicators without a zero-signal (reference track). The maximum coun-
ter reading before a reset is 4,294,967,295 (2^32-1). It can be limited to smaller values.
6.10
Trigger Mode
Value input and output on the confocalDT 2451/2461/2471 can be controlled through
external electrical trigger signals or commands. Both analog and digital outputs are af-
fected. The measured value to the trigger point is output delayed, see Chap.
.
-
Triggering does not affect preset measuring rates.
-
The Sync input is used as external trigger input.
-
Factory settings: no triggering, the controller starts transmitting data as soon as it is
switched on.
-
“Sync in” pulse duration is 5 μs or more.
Level triggering
Measurement value
input
Level low / level high
Measurement value
output
Edge triggering
Measurement value
input
Measurement value
output
Start of measured
value output
Falling edge /
increasing edge
Number of meas-
ured values
Value
Software triggering
Measurement value
input
Number of meas-
ured values
Value
Measurement value
output
Encoder triggering
Measurement value
input
Measurement value
output
Triggering by
Encoder 1 / Encoder 2
/ Encoder 3
Step size
Value [1 ... 2
31
]
Lower limit
Value
Upper limit
Value [1 ... 2
32
]
No triggering
continuous value output
Level triggering
. Continuous value input/out-
put for as long as the selected level is active. After
that the controller stops the input/output of the
values. Pulse duration must last for at least one
cycle. The subsequent pause must also last for at
least one cycle.
U
I
A
0
t
t
D
0
t
Fig. 52 Active high level trigger (U
I
), relevant analog
signal (A
0
) and digital signal (D
0
)
Edge triggering
. Starts value input/output as
soon as the selected edge is active to the trigger
input. If trigger conditions are met, the controller
outputs a defined number of measurements. Value
range between 1 and 16383. After completion of
data output the analog output remains standing at
the last value (Sample & Hold).The duration of the
pulse must be at least 5 µs.
U
I
A
0
t
t
D
0
t
Fig. 53 Falling edge trigger (U
I
), relevant analog
signal (A
0
) and digital signal (D
0
)