Aop_ - Analog Output Lev_Percent - Siemens Moore 353 User Manual

Function Blocks

3.2.16 AOP_ - Analog Output lev_Percent

AOP_ function blocks convert a function block
interconnection signal, input S, to a output which is
bound to a network variable in a node on the
LonWorks network having a SNVT (Standard
Network Variable Type of lev_percent. A maximum
of 25 AOP blocks can be used, up to the limit of nodes
allowed on the Lon network or the memory limit of
the controller. Each use of the block will be assigned a
unique station wide ID (e.g. AOP13). These blocks
will be available when the LonWorks option board is
installed in a 352P, 353, or 354N controller.
The range pointer parameter (input R) tells the
function block where to obtain the signal's range
scaling information. An unconfigured range pointer will use a default range of 0.00 to 100.00. The signal will be
scaled and transmitted on the network as a SNVT_lev_percent (SNVT #81) data type. The NV NUM parameter
enables viewing the output variable number. This may be needed when using a remote PC network manager to bind
this output with the network variable in a remote node.
The block output QS indicates the quality status of the Lon output and will go high when the output is of bad
quality. Bad quality usually indicates a loss of communications within the LonWorks network.
1
3-26
Quality Status
Station
LonWorks
option board
node u
Scaling nv * SNVT ^
nv * binding
node r, nv x
Output
RanGe PoinTeR
NV NUM (nv *)
BLOCK DIAGRAM
ANALOG OUTPUT LEV_PERCENT
AOP_
R
Range
ANALOG OUTPUT
1
Input 1
LEV_PERCENT
QS
R G P T R
RanGe PoinTeR
I N P U T 1
INPUT 1 ...........
(H)
N V N U M
N V
etwork ariable
LonWorks Remote
Device
Remote
node r
I/O Bus
nv x SNVT ^
^ SNVT_lev_percent
X03130S0
UM353-1
LonWorks
Remote I/O Bus
nvoAOPnn1
nv
*
SNVT_lev_percent
........
loop tag.block tag (null)
(S)
loop tag.block tag.output (null)
NUM (*)
ber (nv*) (R) ...... 1 to 2000
March 2003