User Documentation

Configuration
49
Element Meaning
Max. start offset Maximum of the send times of the "normal"-frame relative to the systick
Max. start time
DMA statistics: the maximum time before the first data is available
(graphical representation available by clicking the button)
Max. read time
DMA statistics: the maximum time of an DMA transaction (graphical rep-
resentation available by clicking the button)
Bus statistics
Element Meaning
Bus analysis
With the two buttons "Start/Stop" and "Reset"
the bus analysis can be controlled. As the re-
sult of the bus analysis the following parame-
ter can show values.
Lost frames
Number of lost frames (graphical representa-
tion available by clicking the button)
Early update jitter
Maximum undercut of the cycle time when
sending "early"-frames
Update jitter
Maximum overstep of the cycle time when
sending "normal"-frames
Utilization
Average utilization of the communication
medium in %
Cyclic Utilization
Average utilization of the communication
medium by cyclic communication in %
DC deviation
Deviation of the DC system time (all slaves)
(graphical representation available by click-
ing the button)
Min. DC deviation
Minimum deviation of the DC system time (all
slaves)
Max. DC deviation
Maximum deviation of the DC system time
(all slaves)
In the list "Bus messages" are the messages regarding the bus since the last
start of the PLC listed. This makes it easier to find messages for diagnostic
purposes.
15.3.2 Possible data failures on EtherCAT Bus
By usage of a control with a hardware EtherCAT controller it has to be taken
care of a correct configuration of the EtherCAT controller. Otherwise error
messages due to timing problems can occur.
On controls with hardware EtherCAT controller the EtherCAT interfaces are
marked with "ECAT[x]". On controls without hardware EtherCAT controller a
standard network interface (Ethernet[x]) is configured for EtherCAT.
The EtherCAT controller takes care of the following areas of responsibility:
● Arranging EtherCAT data packages
● Sending and receiving EtherCAT data packages on the bus