1733N Model A – Mini Link/EXT (Version 1)
1732N Model A – ICN Interface Board (Version 1)
MicroMod Automation, Inc.
The Company
MicroMod Automation is dedicated to improving customer efficiency by providing the most cost-effective, application-specific process solutions
available. We are a highly responsive, application-focused company with years of expertise in control systems design and implementation.
We are committed to teamwork, high quality manufacturing, advanced technology and unrivaled service and support.
The quality, accuracy and performance of the Company's products result from over 100 years experience, combined with a continuous
program of innovative design and development to incorporate the latest technology.
Use of Instructions
Ì Warning. An instruction that draws attention to the risk of
injury or death.
Note. Clarification of an instruction or additional
information.
q Caution. An instruction that draws attention to the risk of
the product, process or surroundings.
Although Warning hazards are related to personal injury, and Caution hazards are associated with equipment or property damage, it
must be understood that operation of damaged equipment could, under certain operational conditions, result in degraded process
system performance leading to personal injury or death. Therefore, comply fully with all Warning and Caution notices.
Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual for
any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of MicroMod
Automation, Inc.
Licensing, Trademarks and Copyrights
MOD 30 and MOD 30ML are trademarks of MicroMod Automation, Inc.
MODBUS is a trademark of Modicon Inc.
Health and Safety
To ensure that our products are safe and without risk to health, the following points must be noted:
The relevant sections of these instructions must be read carefully before proceeding.
1. Warning Labels on containers and packages must be observed.
2. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the information
given or injury or death could result.
3. Normal safety procedures must be taken to avoid the possibility of an accident occurring when operating in conditions of high
4. pressure and/or temperature.
5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling procedures must be
used.
6. When disposing of chemicals, ensure that no two chemicals are mixed.
Safety advice concerning the use of the equipment described in this manual may be obtained from the Company address on the back
cover, together with servicing and spares information.
i Information. Further reference for more detailed
information or technical details.
All software, including design, appearance, algorithms and source
codes, is copyrighted by MicroMod Automation, inc. and is owned by
The 1733N Mini Link/EXT (External) with 1732N ICN Interface Board, Figure 1-1, provides
a general purpose serial interface to MOD 30 and MODCELL instruments via the
Instrument Communications Network (ICN). The 1733N Mini Link/EXT supports one ICN
and the 1732N ICN Interface Board supports a second ICN. The External Mini Link
provides intelligent buffers that enable the operation of higher level devices (such as
personal or other computers) by:
•Assembling display and tuning information for a number of instruments and storing the
data in block format. This relieves the host from executing individual requests and
improves the efficiency of the communications.
•Permitting the host device to download and upload instrument configuration
information. This enables instrument configuration to be performed at a central
location using a personal computer that can easily display, manipulate and document
data.
IB-23C004
INTRODUCTION
SECTION 1
INTRODUCTION
•Permitting limited peer-to-peer communications between ICNs.
•Providing diagnostic checks for message validity resulting in secure general purpose
serial interfaces to the ICN.
•Off-loading trend functions when supported by the host application software.
Figure 1-1. 1733N Mini Link/EXT
1-1
IB-23C004
INTRODUCTION
Physically the Mini Link/EXT is a standalone interface box with two serial port connections
for host PC communications and up to two network connections for ICN communications
to MOD 30 and MODCELL instruments. The base configuration consists of:
•Two Serial Ports
The two RS-232C serial ports (one DB9 and one DB25) have individually configurable
baud rates in the range of 300 to 19200 bps. The standard protocol is: Parity - None,
Data Length - 8 bits, Stop Bits - 1. The second serial port could be used to provide
redundant control of the instrument system.
•One Instrument Communications Network Controller
The base ICN Controller is accessed via a two-wire or three-wire connection at the
rear of the box using the three screw terminal block at the connection marked "ICN0".
Communication can be maintained between the personal computer and up to 15 field
instruments.
•Optical Isolation Between Instruments and Personal Computer
The optical isolation feature is jumper-selectable (see Section 2.3, Jumper Settings)
and provides a minimum of 3000 Vdc electrical insulation between the Instrument
Communications Network and the personal computer. THIS FEATURE IS NOT
FACTORY SET.
•External Pushbutton Reset
A 750ms reset pulse can be issued to the External Mini Link by pressing the reset
button located at the rear of the box. The button is prominently labeled "RESET".
•Front Panel Indicators
The front panel of the External Mini Link is divided into two sections labled ICN0 and
ICN1. Each section has three LED indicators as described below:
ENABLEDWhen lit, this LED indicates that the circuit controlling the instru-
ment communications through the corresponding ICN is active and
responding properly to the main processor.
RCVThis LED flashes during instrument to Mini Link/EXT digital com-
munications.
SENDThis LED flashes during Mini Link/EXT to instrument digital com-
munications.
The 1733N Mini Link/EXT can be enhanced with a 1732N ICN Interface Board to provide
communications access to an additional 15 field instruments. This daughter board is
mounted to the External Mini Link board and is accessed via a two- or three-wire
connection at the rear of the box using the three-screw terminal block at the connection
marked "ICN1".
1-2
1.2EXPLANATION OF SERIAL AND CATALOG NUMBER
The products described in this book have numbers that help identify specific features.
The general format of these numbers is described below. Specific product descriptions
follow in Section 1.3.
The serial number stamped on the product data plate consists of the catalog number and,
in some cases, a sequential identification number. The serial number, which is described
below, contains a series of single and multiple-character codes. These codes provide
specific information concerning various electrical and/or structural options. Certain
combinations are not allowed. Options and combinations are subject to change.
The following product is maintained at the serial and catalog number level. The
descriptions included in this section give a brief overview of its functions and features.
1.3.1 1733N Mini Link/EXT (External)
The 1733N Mini Link/EXT is a serial interface box for communications between a personal
computer and the ICN. The central processor for the External Mini Link is the 63B09E
using an 8-bit bus and a 2 mHz dual phase clock. The processor board checks message
protocol and handles all data transfers between the ICN interface boards and intelligent
devices connected to the serial I/O board. Each ICN interface board services direct
communication with one ICN (up to 15 instruments).
The processor board keeps track of all message requests and responses. A request to
the processor board for foreground (display) data from a host device results in the data
being retrieved from the instrument ICN interface board which is automatically updated
every 250 msec. This permits the data to be sent immediately to the host. A request
from a host device for the background (tuning) data of an instrument is acknowledged with
a "wait and acknowledge" response. The instrument ICN interface board retrieves the
requested background data from the instrument and passes it to the processor board.
When all of the data for the deferred request is received by the processor board, it is
immediately transmitted to the host.
1-3
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