Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 339)

Configuration for Online Communications
15-3
4. DH
+
Network. This network is used for all PLC-5 family programmable
controllers. The maximum length of the network is 10,000 ft. The valid node
address range is 0 - 77 octal. The 1785–KA5 Gateway module (or other DH
+
device) is a node on the DH
+
network, allowing the programming device on the
DH
+
network to communicate with devices on the DH–485 network. The gateway
module has a node address of 0 to 77 octal on the DH+ network, as well as a DH+
link id.
5. Ethernet
®
. This network is often already installed in a plant and it is possible to
build on this existing network. A 5820-EI module can be used to bridge from
Ethernet to DH+. With the addition of a 1785-KA5 module, the software can be
used to bridge from Ethernet to DH+ to DH-485.
6. Terminal on Ethernet. This terminal is connected with an Ethernet card using
FTP Software’s PCTCP, TCP/IP driver. PLC-500 A.I. can communicate to a
SLC 5/04 processor on DH+ by bridging through a 5820-EI module or through a
computer running WINtelligent™ LINX™ gateway software. PLC-500 A.I. can
also communicate with SLC 5/01, 5/02, and 5/03 processors on DH-485 by
bridging a second time through a 1785-KA5 module from DH+ to DH-485.
7. Terminal on DF1. Note that with the 1770-KF2, 1770-KF3, 1747-KE device, or
CH0, modems can be used. Modem communications are described in the section
on Using Modems beginning on page 15-34 .