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ACE IP GATEWAY MODULE
General Description
The ACE IP Gateway module (CPU 4600) is a Front End Processor (FEP) which enables
SCADA control centers to communicate and interface with ACE3600 RTUs and legacy
(MOSCAD-M, MOSCAD, and MOSCAD-L) RTUs in a control system. It acts as an interface
between the MDLC world and the TCP/IP world.
The ACE IP Gateway (IPGW) supports MDLC connection to multiple RTUs (ACE3600 and
legacy MOSCAD RTUs) via terminal server ports from multiple SCADA clients.
Data exchange between the SCADA (client) and the ACE IPGW (server) is carried out using
"peer -to-peer" communication over a LAN. SCADA clients can be located on the same
TCP/IP segment (location), connected directly to the ACE IPGW, or on different TCP/IP
segments (locations), connected to the ACE IPGW via a WAN or a bridge device.
The ACE IP Gateway, like all ACE3600 RTUs supports NTP time synchronization, both as
client and as server, MDLC encryption, IP firewall, and dynamic IP conversion table update at
run time. The Gateway supports all ACE3600 and MOSCAD RTU data types.
The ACE IP Gateway does not run a user application and does not support I/O modules.
Like the legacy MOSCAD IP Gateway, the ACE IP Gateway supports redundancy. The
primary and secondary ACE IPGWs share the same site ID. The primary ACE IPGW enables
bi-directional transfer of both SCADA application messages and Gateway management
messages. The secondary ACE3600 IPGW enables transferring of Gateway management
messages only. (It does not send or receive any MDLC messages and is logically disconnected
from the link.)
For general information on using the ACE IPGW module, see the ACE IP Gateway section of
the ACE3600 STS Advanced Features manual. For instructions on configuring the ACE
IPGW module, see the ACE3600 STS User Guide. For information on the ACE IPGW
Application Programming Interface (API) used by SCADA driver developers to build the
TCP/IP and Ethernet-based ACE IPGW Interface, see the ACE IP Gateway API User Manual.
The ACE IPGW module can be installed on any of the existing ACE3600 chassis options
including 19" rack configuration.
Figure 20-1 provides a general view of the ACE IP Gateway Module.
20-1
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