Honeywell UDC 3300 Monitoring Two Loops of Control, Digital Display Indication-Two Loops, None

5.14 Monitoring Two Loops of Control

Introduction	Monitoring two individual loops of control or internal Cascade is the same
	as a single loop except as indicated in Table 5-28.
	Table 5-28 Digital Display Indication—Two Loops

Indicator

none

(two-loop)

I

(cascade)

L”

Loop Indication

Loop 1

Loop 2

Definition

•Upper display shows the Process Variable (PV) for Loop 1

•Lower display shows the Loop 1 parameters and the PV and Output for Loop 2

•Controller setpoint annunciators show the setpoint currently being used for Loop 1

•Upper display shows the Process Variable (PV) for Loop 2

•Lower display shows the Loop 2 parameters and the PV and Output for Loop 1

•Controller setpoint annunciators show the setpoint currently being used for Loop 2

Loop display

Viewing each loop’s process variable

Internal cascade indication

Display of Loop 1 or Loop 2 (if configured) is selected by toggling the

FUNCTION / LOOP 1/2 key.

Regardless of which loop is being displayed, 1 or 2, the process variable of the non-displayed loop can be shown in the lower display by repeated

presses of the LOWER DISPLAY key until 1PVXXXX or 2PVXXXX

is displayed.

When internal Cascade has been configured, an “I” will appear on the left side of the upper display as long as Loop 1 is operating in the remote

setpoint mode. Hold in the SETPOINT SELECT key until RSP appears

in the lower display then release the key to select remote setpoint.

Switching between automatic and manual mode on either loop will not affect the internal Cascade indication.

180 UDC 3300 Controller Product Manual 4/00