User Manual

PoKeys user manual
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7.16. Network device functionality
PoKeys57CNC device can be connected to Ethernet 10/100 network with standard RJ-45 cable.
By default, the device is set to use the DHCP functionality of the network router. User can later turn
on or off the DHCP support. If DHCP is not required or available, fixed IP address must be defined for
the device. To set the network settings of the device, go to Device menu and click Network device
settings...
Figure 38: Device network settings
The device communicates using TCP and UDP port of 20055. Please ensure the firewall settings
allow communication with this port. Also, please make sure that your network card (which you
have connected the PoKeys device to) has an IP address assigned with the subnet mask
255.255.255.0 (check it in IPv4 settings in your system).
By default, PoKeys device is configured to close the connection with the host after 3 seconds of
inactivity. This connection timeout value can be set in the dialog, shown in Figure 38.
Device discovery
Unless PoKeys device is configured with a fixed IP address or static DHCP lease option is enabled on
the router, user has no direct display of what IP the PoKeys device is configured or assigned with.
Therefore, PoKeys device feature an automatic discovery mechanism that uses discovery packets
sent from software looking for PoKeys device and discovery response packets that PoKeys device
constructs as an answer to a discovery. The discovery response packet contains vital PoKeys device
information that can be used to identify and find the PoKeys device in the network.
In case the DHCP server is not available in the network or if discovery packet was received from
different subnet than the one used by PoKeys device, the device will change to a temporary IP
address from the same subnet (defaulting to 255.255.255.0 subnet mask) that the request was sent
from. This temporary address can be recognized by ending in .250 and should only be used to find a
misconfigured device and setup it with proper network configuration. The discovery process can be
disabled under Device > Network device settings by clicking ‘Advanced’ button.
More information on this mechanism can be found in the Protocol specification document.