anglais normalement c'est bon .pdf


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Taille du document: 101 Ko (3 pages).
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1.4.

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The 2500 is a modular system which can provide multi-loop PID control, analogue and digital I/O, signal
conditioning and computational blocks with a variety of plug-in modules.
I/O Control Module (IOC)
Always mounted in the left hand position.
This view shows the Modbus IOC

2500M Plug-in I/O Modules
Can be mounted in any order

Configuration
port RS232
Optional Fuses
or Isolator links

Address switch

Plant and Process
Connections

Digital
communications
ports RS485/422

2500B Base

Figure 1-1: General View of the 2500 DIN Rail Controller and I/O Unit

The base unit (2500B) can be provided in different sizes, with up to 16 I/O modules. The base can be mounted
on DIN rail (35mm top-hat), or just bolted to a wall.
Terminal Units (2500T) clip into the base, providing customer connections to and from the plant devices and
interconnections between modules and the Input Output Control module (IOC). Terminal units are specific to
particular modules as defined in the order code, Appendix B.
I/O Modules (2500M) clip into the Terminal Units. These modules are dedicated to specific functions - analogue
or digital, input or output. The IOC module (2500E or 2500C) contains the configuration for the system and
communications support. Three communications versions are available for Modbus, Profibus or Devicenet.
The system requires 24Vd.c. at an average of 100mA per module. A suitable power supply is 2500P available in
2.5, 5 or 10 amp versions.

1.5.

WHAT DOES THE 2500 DO?

The 2500 system functions around a database core. In this database all important system numbers and values
are stored as parameters at specific addresses. Examples are measured voltages, PVs, status words, channel
settings, limits, PID loop values.
This database is updated regularly every 110ms (nominal). At each update input channel values are recorded
and output channel signals are set. All computational blocks - PID loops, Toolkit blocks, user wiring and so on
are also calculated and updated on each 110ms tick.
Network communications is implemented as a gateway to the database. Any network transaction driven by an
external master effectively reads and writes to database parameters. The only difference is that the network
updates are asynchronous - the transaction rate is set by the master.
There are two key aspects to the use of the 2500:1. the set-up or configuration of the system to implement the desired control strategy;
2. the run-time execution of that strategy.
This handbook concentrates on configuration aspects as being a convenient way to explore the considerable
number of features available in the 2500 system.

Part No HA027115 Issue 5 Feb -14

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WHAT IS THE 2500?

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2500 Controller Engineering Handbook
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The 2500 is normally supplied as a number of separate parts, identified by a unique model code printed on
labels on the packaging and on each item. These codes are explained in Appendix B.
The parts can be briefly classified as follows:
the Base “2500B”
the I/O Controller Module - “2500E” (or the superseded “2500C”)
the I/O Modules “2500M”
the Terminal Units “2500T”
the 24V Power Supply “2500P” mounted separately from the 2500 base
Accessories “2500A” (e.g. cables and terminators)
The electrical interconnection of these parts is shown in the block diagram below. The Base unit contains a PCB
linking the modules together - the I/O Bus.
Internal I/O bus

IOC
module
2500C or
2500E

I/O
module 1

Terminal unit
2500T

Modbus or Profibus
or Devicenet
communications to
host PC or Display
Unit

∫∫

I/O

I/O

I/O

module 2

module 3

module n

2500M

2500M

Terminal unit

Terminal unit

Terminal unit

2500T

2500T

2500T

2500M

Plant or Machine under control





2500M

Terminal unit
2500T

∫∫

Figure 1-2: 2500 Block Diagram

1.7.

UNPACKING THE INSTRUMENT

The instrument is despatched in a special pack, designed to give adequate protection during transit. Should
the outer box show signs of damage, it should be opened immediately, and the contents examined. If there is
evidence of damage, the instrument should not be operated and the local representative contacted for
instructions. After the instrument has been removed from its packing, the packing should be examined to
ensure that all accessories and documentation have been removed. The packing should then be stored against
future transport requirements.

14

Part No HA027115 Issue 5 Feb -14

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THE COMPONENTS OF THE 2500

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