Honeywell UDC2800 User Manual

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Diagnostic Messages
The instrument performs background tests to verify data and
memory integrity. If there is a malfunction, a diagnostic message will
be shown on the diagnostics display. In the case of more than one
simultaneous malfunction, the diagnostic messages will be shown in
sequence, with the highest priority message being shown first. See
the section Backgroud Tests and Diagnostic Messages for a list of
the Diagnostic Messages and how to correct the problems that they
indicate.
Figure 5-2: Functional Overview Block Diagram of the controller
Chapter 5 - Monitoring and Operating the Controller

Honeywell UDC2800 Specifications

General

Control Modes	PID, ON/OFF, Manual
Mounting	Panel Mount
Display	Dual 4-digit LED
Input Types	Thermocouple, RTD, mA, mV, V
Output Types	Relay
Power Supply	100-240 VAC, 50/60 Hz
Communication	RS-485 Modbus RTU
Enclosure Rating	NEMA 4X