Honeywell UDC 3300 Auto/Manual Station, Introduction Function, State DI #1 Open DI #1 Closed

5.19 Auto/Manual Station

Introduction

Function

When you select “AM STA” (auto manual station) under the Option Set Up group function prompt “DIG IN1” or “DIG IN2” (digital input option), contact closure on the selected digital input causes the controller to switch to Auto/Manual Station mode.

As shown in Figure 5-5, State 2 is the “A/M Station mode” where the programmable logic controller (PLC) output is sent through the Auto/Manual Station. You can switch to manual and change the output at the controller. (It uses PID set 2.)

State 1 is the “Backup PID mode” which is triggered by opening the digital input. (It uses PID set 1.)

Figure 5-5 Auto/Manual Station and Backup Control Feature

T/C		PLC
PV	T/C	SP

Control output

4-20 mA

DI #1 = "AM STA"

OPEN (new

CLOSED selection)

			IN1		IN2
	State 1:					State 2:
	DI #1: Open					DI #1: Closed
	BACKUP		PV		PV	A/M STATION	Alarm
	PID
							Output on
	CONTROL					– Direct action
							Manual
Aux	LSP = SP1			LSP = 2SP		– PD+MR
			PID A		PD+MR		Mode
						– SP = 2SP
Output
						– PV = IN2	(new
SP1 =	PIDSET1					– PIDSET2	selection)
new
selection	P =	same
	I =	} as	OUT1		OUT1
	D =	PLC
						Configure
						State 2 per
						next page.
				Output 1
				4-20 mA

To valve 24184

190 UDC 3300 Controller Product Manual 4/00