Instruction Manual

Logic Functions - Book 1
DATABASE DESCRIPTION
2-2
** Connects any of the following remote
module blocks: RDIM, RDOM
Main Block
Execution
Order
Interface
Block (IF1)
System
Event Block
(SE1)
Loop
Block #1
Loop
Block #n
Loop
Block #64
Function
Block
Execution
Order
*
*
*
*
*
*
*
*
*
Configured
List (CL)
*
I/O Module
Block
Selection
(32 modules
per
MODCELL)
TIM
RIM
VCIM
CJIM
WDOM
DDOM
DOM
DIM
ICN
Function
Block
Execution
Order
Function
Block
Execution
Order
AOM
WRIM
MSC
RIO**
= Any of the following function blocks:
CL (Configured List)
ML (Modbus List)
DI (Digital Input)
VCI (Voltage/Current Input)
TTI (Temperature Transmitter Input)
TI (Thermocouple Input)
CJI (Cold Junction Input)
RI (Resistance Input)
RTI (RTD Input)
RTTI (RTD Transmitter Input)
EX (Expression)
IC (Input Communications)
OC (Output Communications)
LN (Linearization)
PA (Process Alarm)
TM (Timer)
NM (Notification/Request Message)
SM (Supervisory Message)
TOT(Totalizer)
PW (Piecewise Table)
DVC (Device Block)
SSEQ (Small Sequencer Block)
LSEQ (Large Sequencer Block)
PID (Regulatory Control)
RSK (Ramp/Soak)
Figure 2-1. Database Structure
Types of Blocks
There are three basic categories of block types. They are:
• Environment blocks
Supports general instrument operation and do not directly perform the user defined
control functions. Of these, the interface and system event blocks (there can only be one
occurrence of each) are visible and always exist as part of any configuration. Other
service type blocks are transparent to the user.
• Module blocks
Specify the physical I/O complement of the instrument. The I/O configuration for the
instrument is flexible; there are 32 positions on one MODCELL for example, allowing
various combinations of I/O modules, and some limitations.