Specifications

RSLinx – Training Guide 23
Application Notes and Suggestions (continued)
Routing through bridge devices
• RSLinx can not communicate through an external bridge device when using the
1756-DHRIO bridge device with the TCP or CNET driver.
The problem exists when the first bridge is a 1756-DHRIO device and the
second bridge is not a 1756-DHRIO device (for example, Pyramid Integrator). In
this case, the source link ID remains at zero and the response packets fail. The
following limitations currently exist:
• Offlink routing works through one bridge.
• Offlink routing works through two or more bridges if the first bridge is a 1756-
DHRIO module.
• Offlink routing does not work through two or more bridges if the first bridge is
something other than 1756-DHRIO device.
• You cannot go from a DHRIO module through a 1785-KA bridge device to a DH
network.
• To go from a DHRIO module through a 1785-KA5 bridge device to a DH485
network, the DHRIO module must be configured using the ControlLogix Gateway
Configuration tool. For example, if a 1785-KA5 bridge is on a DH+ network at
node 4 and the DH485 LinkID is 13, complete the following:
1. Select File > Browse Network.
2. Select the DHRIO module.
3. Go to the routing table configuration tab.
4. Right-click on the channel being used and select Add Module.
5. Select the DH+ Bridge.
6. Enter the DH+ node number of the KA5 (4 in this example), and the
LinkID of the DH485 (13 in this example).
7. Click Apply. You can now browse through the KA5 module.