Siemens Moore 353 User Manual page 96

Function Blocks
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).
i|ware PC Faceplate Display
3-66
.S
2
Process
T C
UNITS
P
Process DPP
P
S
Process
Engineering
INput units
scaling
P
Valve
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
BLOCK DIAGRAM
.P
4 2 3. 4 5
Process
2 0 5 3 . P
UNITS
S P
P
Process DPP
Process
Engineering
INput units
scaling
P
RanGe PoinTeR
.V
OPEN
H BAR RD
User 1 STATUS
User 2 STATUS
.X
Input X
UNITS
Loop Event Handling
.Y
Station Error Handling
Input Y
UNITS
Alarm Bargraph Flasher
UM353-1
P
P
Process
U1
U2
.
LE
SE
PN
Pulse oN
PF
Pulse ofF
Rev. 3
March 2003