Auto/Manual Station; Figure 5-5 Auto/Manual Station And Backup Control Feature - Honeywell UDC 3300 Product Manual

5.19 Auto/Manual Station

Introduction
Function
Figure 5-5
State 1:
DI #1: Open
BACKUP
PID
CONTROL
LSP = SP1
Aux
Output
SP1 =
PIDSET1
new
selection
P = same
}
I = as
D = PLC
190
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.)
Auto/Manual Station and Backup Control Feature
T/C
IN1
PV
PID A
OUT1
Output 1
4-20 mA
To valve
UDC 3300 Controller Product Manual
PV
SP
T/C
Control output
4-20 mA
IN2
State 2:
DI #1: Closed
A/M STATION
PV
– Direct action
– PD+MR
LSP = 2SP
PD+MR
– SP = 2SP
– PV = IN2
– PIDSET2
OUT1
Configure
State 2 per
next page.
PLC
DI #1 = "AM STA"
(new
OPEN
selection)
CLOSED
Alarm
Output on
Manual
Mode
(new
selection)
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