Thanks for the detailed reply.
The problem is that the simple three-digit wheel configuration of the 1734-AENT uses a more restrictive subnet mask than the one used by your computer and the CompactLogix.
If you use the three-digit wheel method, the 1734-AENT is configured for what's called a "Class C private subnet" where the IP address is 192.168.1.xxx, and the Subnet Mask is 255.255.255.0, and the Default Gateway is 192.168.1.1.
This is the most common small private subnet; millions of home and industrial networks are set up just like that, so that's how Rockwell Automation made the simplified setup work. When you are using the 3-digit thumbwheel, the subnet mask and default gateway values cannot be changed.
In your case, what this means that the POINT adapters can only communicate with devices whose "network number" is "192.168.1". Your computer and PC are using a "network number" of "192.168".
So you're going to have to change the IP addresses, subnet mask, and default gateway values for the 1734-AENT modules.
The easy way to do this is by using the Rockwell "BOOTP/DHCP Server Utility" that is installed alongside RSLinx Classic.
When you open up the utility, go into the Network Settings and set up the Subnet Mask for 255.255.0.0, and set up the Default Gateway for 192.168.50.1 (or whatever it really is on your network).
You can find step-by-step directions on using the BOOTP/DHCP Server Utility (there's a decent Online Help, too).
The basic principle is that you'll set up the 1734-AENT's for "BOOTP/DHCP" mode, then plug them into the network one at a time and the utility will give them an IP address based on the correlation table you create. You'll want to write down the "MAC ID" hardware address for each one so you can create that table.
To get the 1734-AENT to use BOOTP/DHCP mode, set the 3-digit wheel to "888" and cycle power.
Once you have set up the 1734-AENT's with IP addresses in the 192.168.50.x range, they should appear in the RSLinx Classic "Ethernet Devices" driver browse (if you put them in the table) or automatically in the "EtherNet/IP" driver browse.
Very important: Once you've set up the module address using BOOTP/DHCP, you need to disable that feature and let the module use the address stored in memory. The general procedure is:
. set thumbwheel to 888 (this defaults the AENT and enables DHCP)
. Use bootp server to send address
. Disable BOOTP/DHCP in the module (using BOOTP server tool or right-click in RSLinx Classic and select Configure Module).
. switch power off from the adapter
. set thumbwheel to 999 (this fix on AENT the address you set)
. re-apply power