Function Blocks; Loop Function Block Types - Siemens Moore 353 User Manual

Introduction
s s
2 4 2 . 4 5 3 2 4 2 . 4 5 3
T C2 0 5 3 . P T C2 0 5 3 . P
S P S P
100 100
L L
PB1 AC K PB1
80 S 80 S
60 60
D PB2
PB2
40
40
A A 20
20
M UNITS M
0 0
LOOP
LOOP
0 | | | 100 0 | | | | 100
|
CLOSE OPEN CLOSE
Moore 353 Moore 353
X 03141 S2
Multiple Moore 353 and Procidia i|pac Nodes,
each with an Ethernet Network Board.
Often in this publication, reference is made to the labels on the controller to ensure that the controller being installed
has the correct power input, I/O, communication options, and approvals. This is particularly important when non-
incendive requirements are present or a critical process is involved where a custom configuration or calibration has
been created. Label locations are shown in Figure 1-1 and typical labels are shown in Section 14 Model Designation
and Specifications.

1.2 FUNCTION BLOCKS

Controller software is built on proven function block designs from previous LIL products and from Siemens
APACS® products that support the IEC1131 standard. In many cases, the controller has been enhanced with
features only now possible with state of the art technology.
Function blocks are selected for use within a LOOP. Multiple loops can be configured, and each loop can be
associated with an operator faceplate. Certain blocks are used once within each loop (e.g. controller, setpoint,
auto/manual), others can be used as many times as needed. Some notable features include Auto Tuning within the
PID function blocks, an expandable Sequencer that allows configuration of up to 250 steps, and up to 256 discrete
inputs and outputs. In addition, the Graphical Configuration Utility can be used to design the logic in a ladder
diagram. Combining these features with continuous control loops within the same controller offers a well-
integrated solution for small batch operations.
Several function blocks are available at the station level for configuration of STATION level parameters, such as
the station address and station tag name. Function blocks include the CLOCK block (when the RTC/CB option
board has been included), and the ETHERNET block (when the Ethernet board has been installed and the controller
contains firmware V2.4 or higher) to configure parameters such as the IP address. All other function blocks are
used for configuration within an individual LOOP. Control implementations are configured in the Moore 353 by
first creating a loop, then entering a unique loop tag name and selecting function blocks for use within that loop. A
number of loops can be configured in the Moore 353 and a number of function block types are available as
described in the sections that follow.

1.2.1 LOOP Function Block Types

Local I/O Function Blocks are provided on both the MPU Controller Board
and the I/O Expander Board. These blocks can be used in any LOOP, but as
fixed resources are expendable. When used within a loop, the unique block
name becomes <loop>.<block> (e.g. TC2053.AIN1 for Analog Input 1 used in
loop TC2053).
1-4
Ethernet
AC K
D
UNITS
OPEN
P3
P4
X 03141 S2
1 3 5 7 9 1 1 1 3 1 5 1 3 5 7 9 1 1 1 3 1 5 1 3 5 7 9 1 1 1 3 1 5
P1
Ethernet-Modbus
Bridge
FIGURE 1-2 Ethernet Architecture Example
Local Client
Internal Web Server
Intranet
Modbus
Foreign Device with
Modbus Communications
AIN_
AIN_+
ANALOG INPUT
AIN_c
UM353-1
Output 1
O1
Quality Status
QS
EXTRACTOR
March 2003