13 Appendix
13.6 System limits
120
Gateway XN-312-GW-EC
07/20 MN050010-EN Eaton.com
13.6 System limits
Table 4:
System limits
Gateway XN-312-GW-EC
Maximum number of nodes
32
Task cycle time (min/max)
500
μ
s to 32ms
Number of nodes on network
Depends exclusively on the EtherCAT master.
Data volume limitations
Maximum PDO size
1194 bytes Rx and Tx each
The relationship between the timing on the system bus and
EtherCAT communication can be adjusted with the ISO start time
(CoE SDO). Default value: 50%
Operating mode limitations
Free run mode
In free run mode, the system bus cycle runs independently of the
EtherCAT cycle
This needs to be taken into account for the data refresh time.
DC synchronous mode
In DC synchronous mode, a maximum of 200 synchronous
EtherCAT frames are allowed to miss the time window when using
default settings. If necessary, task cycle times and task priorities
must be optimized.
EtherCAT master with high jitter
In EtherCAT systems with high jitter, the "Sync Error counter limit"
value must be increased to the maximum value of 65535 under tab
XN_312_GW_EC/CoE object 0x10F1 Error Settings in the #02 sub-
index if necessary.
