Beckhoff KL3361, Documentation

Page: 60 / 70

Access from the user program
KL3361 and KL3362 60 Version: 2.2.0
R35: Sample rate
Interval (T
s
) between two samples (scans) in microseconds.
The sampling speed is limited to T
s
=100 µs (10 kHz) by the evaluation of the trigger detectors.
Only the Fast sampling [
}
42] mode enables sampling at T
s
=10 µs (100 kHz).
Data transfer rate on the K-bus
The sample rate influences the transmission speed with which the oscilloscope terminal can be ad-
dressed by the K-Bus.
This must be taken into account when considering your PLC cycle time:
• A sample rate of 100 µs can only accommodate bus cycles with a minimum duration of 3 ms!
• A sample rate of 150 µs can only accommodate bus cycles with a minimum duration of 2 ms!
• The Fast sampling [
}
42] mode can only accommodate K-bus cycles with a minimum duration of
2 ms!
R36: Sample amount
Number of sampling values to be recorded. A maximum of 4,000 values can be recorded (default 100).
R37: Index register for output data (terminal parameters)
• Low byte:
The content of the Low byte of this register determines which parameter of the oscilloscope terminal
◦ KL3361 is assigned process data register DataOUT0 [ } 51]
◦ KL3362 is assigned process data register DataOUT0 (channel 1) [
}
51] or process data register
DataOUT0 (channel 2) [
}
51]
is described. The decimal value of the indices corresponds to the register number of the parameter
to be written.
The following indices are supported:
Index Decimal Parameter
0x00 00 Default value
0x29
41 [ } 62]
Trigger unit 1, switching threshold 1
0x2A
42 [
}
63]
Trigger unit 1, switching threshold 2
0x2B
43 [
}
63]
Trigger unit 1, pulse width
0x2C
44 [
}
63]
Trigger unit 1, valid trigger time
0x2F
47 [
}
63]
Trigger unit 2, switching threshold 1
0x30
48 [ } 63]
Trigger unit 2, switching threshold 2
0x31
49 [
}
63]
Trigger unit 2, pulse width
0x32
50 [ } 63]
Trigger unit 2, valid trigger time
• High byte:
The content of the High byte of this register determines which parameter of the oscilloscope terminal
◦ KL3361 is assigned process data register DataOUT1 [ } 51]
◦ KL3362 is assigned process data register DataOUT1 (channel 1) [
}
51] or process data register
DataOUT1 (channel 2) [
}
51]
is described (see Low byte [
}
60] for indices).