Siemens Moore 353, Руководство пользователя

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Function Blocks UM353-1
March 2003 3-66
Communications’ section. The ‘LOOP #’ and ‘LIL CHAN’ parameters enable configuration of a loop index
number (x) for Modbus data or a starting channel (n) for LIL loop data.
Input CL controls local arbitration of changes to loop data from the network. When input CL is not configured, the
three status outputs LO (in 1.21 firmware this output was named L), CN, and CM will be set high (1) and changes
can be made from a network command or the local faceplate. When CL is configured, it can be changed locally
from a pushbutton switch such as PB1SW output PS (configured as momentary) and will change from local to
console or console/computer to local with each positive transition of the input. Also, when output LO goes high,
output CN will also go high and CM will go low, indicating that the control source will change to Console
whenever Local is disabled, either by a positive transition 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 Modbus network 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).
P
BLOCK DIAGRAM
IN
put units
E ngineering
scaling
V alve DPP
4 2 3. 4 5
T C 0 5 3
. P
2
P rocess
IN
put units
E ngineering
scaling
P rocess
P rocess DPP
S
S P
.S .P
IN put units
E ngineering
scaling
V alve
V
.V
UNITS
P rocess
UNITS
P rocess
Input X _ DPP
X
.Y
Input Y _ DPP
Y
U
ser
1 STATUS
U1
U ser 2 STATUS
U2
UNITS
Input Y
.X
UNITS
Input X
Alarm Bargraph Flasher
P ulse o N
P ulse of F
PN
PF
S tation E rror Handling
SE
P rocess
R an G e P oin T e R
UNITS
V alve
V
alve
R an G e P oin T e R
P rocess DPP
2
P
P
P
P
V
V
Input X
R an G e P oin T e R
H BAR LD
H BAR RD
CLOSE
OPEN
.
.
P
P
Input Y
R an G e P oin T e R
L oop E vent Handling
LE
Rev. 3
A
Global Alarm Acknowledge
i|ware PC Faceplate Display
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