On 02/28/2012 05:21 PM, Kirk Wallace wrote: > ... snip > > I think I know a little more now. I was able to bring up > "loadusr classicladder --modslave" (I didn't know the rt component had > to be loaded too). My netstat returned the same result above with > "0.0.0.0:9502". I then did a ifconfig to find my network computer's > addresses with 192.168.1.10 (eth0) and 127.0.0.0 (localhost) being > listed. I nmap both addresses and found port 9502 open on both, so it > seems by default, "--modslave" will listen on all addresses (two in this > case), with "all or any addresses" being called out as "0.0.0.0". > http://en.wikipedia.org/wiki/0.0.0.0 > > If I use "loadusr classicladder --modslave --modbus_port=1502" netstat > sees port 1502 as listening, nmap doesn't see it whereas it did see 9502 > previously. My guess is that as any ports above 1000 have lighter > restrictions, maybe ports above a higher value are handled differently > too, so 1502 doesn't show where 9502 does. I guess I have more work to > do. > > I haven't tried connecting to the LinuxCNC slave with a master yet. > Actually, ports 1024 and below are considered "privileged" ports. Any ports above that are considered "non-privileged" ports and are all treated the same. Do a 'netstat -a | grep 1502' and see if the 1502 port shows up.
Mark ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
