BECKHOFF BK3xx0 - Manual (Page 61)

Notes on the Documentation
Fieldbus Components 59
Cycle Time Measuring
The duration of the process data cycle can be measured with DPV1. /p>
The cycle time measurement is started or stopped using DPV1 Write:
Slot number Index Length Data Description
Byte 0: 0x04
Byte 1: 0x01
Byte 2: 0x01
0 99 4
Byte 3: 0x00
Start the cycle time measurement
Byte 0: 0x04
Byte 1: 0x01
Byte 2: 0x00
0 99 4
Byte 3: 0x00
Stop the cycle time measurement
The minimum, maximum, mean (of the last 200 cycles) and current cycle time can be read with DPV1 Read and reset
with DPV1 Write:
Slot number Index Length Data Description
Byte 0, 1 Minimum cycle time in µs (INTEL format, low byte first)
Byte 2, 3 Maximum cycle time in µs (INTEL format, low byte first)
Byte 4, 5 Mean cycle time in µs (INTEL format, low byte first)
0 98 8
Byte 6, 7 Current cycle time in µs (INTEL format, low byte first)