Siemens 353 User Manual page 85

UM353-1B
on input CL or from a network command. The Computer CM state can be set high using a network command. The
NL output will normally be connected to the MD input of pushbutton block PB1SW to indicate the C/L switch
position on the operator faceplate, a green LED for C and a red LED for LO.
Output WD will go high (1) when the controller fails to receive a command within the watchdog time. The
watchdog time is set in the STATN (Station Parameters) function block. Input A can be used to acknowledge all the
alarms in all of the loops in a controller. Output PN (Pulse oN) will go high for 0.5 seconds (or one scan cycle
whichever is longer) whenever the bargraph flashes. Bargraph flashing is controlled by the priority setting of
alarms or events. Output PF (Pulse ofF) will go high for 0.5 sec when the flashing bargraph is stopped (e.g.
pressing the ACK button).
i|ware PC Faceplate Display
April 2012
.S
Process
UNITS
P
Process DPP
P
S
Process
Engineering
INput units
scaling
P
V
UNITS
Valve DPP
V
Valve
Engineering
INput units
CLOSE
.
scaling
H BAR LD
Valve
V
RanGe PoinTeR
X
Input X _ DPP
Input X
RanGe PoinTeR
Y
Input Y _ DPP
Input Y
RanGe PoinTeR
A
Global Alarm Acknowledge
2 4 2 3. 4 5
Process
T C 2 0 5 3 . P
UNITS
S P
P
Process
Engineering
INput units
scaling
P
Valve
.V
OPEN
H BAR RD
.X
Input X
UNITS
.Y
Input Y
UNITS
Alarm Bargraph Flasher
BLOCK DIAGRAM
Function Blocks
.P
Process DPP
P
P
Process
RanGe PoinTeR
U1
User 1 STATUS
U2
User 2 STATUS
.
LE
Loop Event Handling
SE
Station Error Handling
PN
Pulse oN
PF
Pulse ofF
Rev. 3
3-55