Honeywell UDC3300, Product Manual

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190 UDC 3300 Controller Product Manual 4/00
5.19 Auto/Manual Station
Introduction 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.
Function
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
T/C
PLC
PV
SP
IN1 IN2
PID A
OUT1 OUT1
Output 1
4-20 mA
To valve
Aux
Output
SP1 =
new
selection
DI #1 = "AM STA"
(new
selection)
State 1:
DI #1: Open
BACKUP
PID
CONTROL
State 2:
DI #1: Closed
A/M STATION
LSP = SP1
LSP = 2SP
– Direct action
– PD+MR
– SP = 2SP
– PV = IN2
– PIDSET2
PIDSET1
P =
I =
D = same
as
PLC
Configure
State 2 per
next page.
Control output
4-20 mA
PV PV
Alarm
Output on
Manual
Mode
(new
selection)
PD+MR
}
24184
OPEN
CLOSED