Awe_ - Analog Write Ethernet (V3.0) - Siemens Moore 353 User Manual

Function Blocks

3.2.21 AWE_ - Analog Write Ethernet (V3.0)

AWE_ function blocks are available when the
optional Ethernet communication board
in the controller. It enables the controller to write
analog data to other Modbus devices over the
Ethernet network.
Up to 32 AWE_ blocks are available. Blocks are
assigned in sequence, controller wide, with each
use.
Data can be written as a real floating-point number
or as a 16-bit integer as configured by the DATA
TYP parameter. A Floating point number can be
selected to have one of four byte orders (BYTE
ORD) with 1 being the most common (see Table 1
under AIE block description). An integer is
converted from the block input S, which is a
floating point number, by the MIN INT & MAX
INT parameters using the range scaling information
obtained from the source function block in the
controller with the range pointer input R. Both
Unsigned Integer (Uint) & Signed Integer (Sint)
options are available. See the table listing
parameters and default values below.
The IP ADRES parameter is used to configure the IP address of
the destination Modbus device. The MB ADRES parameter
allows a Modbus address to be configured. When connecting to
other Siemens MOORE controllers the Modbus address is set to
1. In some cases, other devices may use a different address or
when going through a Modbus TCP/IP gateway a Modbus
network may have multiple devices, each having a unique address.
There are three write update options that can be configured by the UD TYPE parameter.
1. oncE will write once to the MB REG (Modbus Register). The controller will write when the input value
changes by more than the value set with the TRIG DB parameter. This parameter is set based on a percentage
of the range determined by the range pointer input R.
2. P2P will update at the controller peer to peer rate set in the ETHERNET block.
3. Ct will update at the cycle time of the controller.
The Ct option is normally only used when writing to I/O outputs in a PID control loop. Input T can be used to
trigger a write. This would be used in cases where the oncE option has been selected, Input S does not change so as
to trigger a write based on the trigger dead band, and there may be a concern that the receiving device has lost the
value.
Output QS indicates the quality of the write operation and will go high (1) when the write is not completed
successfully. This is normally associated with failure of the destination device to receive data due to a
communication failure or a misconfiguration of the device.
7
Requires Ethernet communications board firmware version 2.0 or later
3-30
7
is installed
ANALOG WRITE - ETHERNET
Range
Input S
Input T
Quality Status
I P A D R E S
R G
I N P U T
I N P U T
M B A D R E S
M B
D A T A
B Y T E
U D
T R I G
M I N
M A X
AWE_
R
ANALOG WRITE
S
ETHERNET
T
QS
IP AD dRES s ............ nnn.nnn.nnn.nnn
(H)
P T R
RanGe PoinTeR .......... loop tag.block tag
(H)
S
INPUT S ........... loop tag.block tag.output
(H)
T
INPUT T ........... loop tag.block tag.output
(H)
MB AD dRES s .............................. 0 - 255
(H)
R E G
ModBus REG ister ............ 00000 - 65535
(H)
T Y P
Modbus DATA TYP e .......... FP/Uint /Sint
(H)
O R D
BYTE ORD er ................................ 1/2/3/4
(S)
T Y P
E
UpDate TYPE .................... oncE/P2P/Ct
(H)
D B
TRIG ger Dead Band ............ 0.1 - 10.0 %
(S)
I N T
MIN imum INT eger ................. (see table)
(S)
I N T
MAX imum INT eger ................ (see table)
(S)
Selection Parameter
MIN INT
Uint
MAX INT
Uint
MIN INT
Sint
MAX INT
Sint
UM353-1
(192.168.0.0)
(null)
(null)
(null)
(0)
(00000)
(FP)
(1)
(oncE)
(0.2)
(*)
(*)
Default Value
0
65535
-32768
+32767
March 2003