As shown in Figure 2. the APM is a fully integrated member of the

TDC 3000X family. Accordingly, it is capable of:

• Performing data acquisition and control functions, including

regulatory, logic, and sequential control functions, as well as

peer-to-peer communications with other Universal Control

Network-resident devices.

• Providing bi-directional communications to Modbus™ and

Allen-Bradley compatible subsystems through a serial interface.

• Fully communicating with operators and engineers at Universal

Stations, UXSs, and Universal Work Stations.

Procedures and displays are identical or similar to those used

with other TDC 3000X controllers, as well as to HPMand PM

point displays.

• Supporting higher level control strategies available on the Local

Control Network through the Application Module and host

computers.

• Using the same I/O and wiring as the PM and HPM, thus providing

cost-effective upward migration from existing PMs as well as the

capability to migrate to HPMs in the future.

Universal Control Network The communications channel for the

Advanced Process Manager is a local area network called the

Universal Control Network (UCN).

Introduced to TDC 3000X users in 1988. the UCN is the secure

path for process I/O connections to the TDC 3000X.

The UCN features a 5 megabit per second, carrier band communica

tion system with a token bus network. It is designed to be

compatible with IEEE* and ISO** standards.

consistent with the growth and direction of evolving international

standards, with appropriate Honeywell extensions for secure

process control applications.