Integrators
Model 320 Independent Computer Interface
Introduction
Features & Benefits
Broadcasts computer-generated data to all link devices
every 1/2 second
Captures real-time process data and configuration information
Allows custom data acquisition/data generation applications
to be implemented
Local lockout switches limit computer-generated changes
Prevents computer from disrupting link operation
Provides full error checking and data security
2
Flexible data communications interface accommodates
various communication options, including RS232C, RS422,
or modem operation
Convenient data and power connections support standard
panelboard mounting
Description
The 320 Independent Computer Interface (ICI) is a versatile,
microprocessor-based communication controller that allows
a computer to communicate and share data with any device
on the Local Instrument Link (LIL). Process and configuration
data can be requested from the LIL global database or a LIL
device, or sent directly from the computer to the device or
database. The Model 320 controls all data communications,
performs error checking, transfers the data between the
LIL and computer, and acknowledges commands sent by
the computer.
Because the Model 320 provides access to LIL data and
flexible communication with a computer, programs can access
information that fulfills specific needs and capabilities.
Once installed and connected to a computer and the LIL, the
Model 320 requires no further operator intervention or special
procedures for communication with the computer.
Using the Model 320 with an independent computer on
the LIL allows it to be used in a wide variety of applications,
such as:
Process monitoring and recording
Real-time and historical reporting
Loop accounting
Information management
Supervisory control
Configuration control and management
2.33
Integrators
Model 320 Independent Computer Interface
Technical data
Hardware Specifications
Software Specifications
Components
Commands
MPU Board
Serial Port Communication Board
Local Instrument Link Communications Board
ICI Status
Local Channel Data Send
Parameter Data Send
Multi-Byte Parameter Data Request
Perform Diagnostics
Random Channel Data Request
Random Parameter Data Request
Read LIL Command Input Buffer
Record Request
Read Record Request Buffer
Record Send
Response to Received Random Parameter Data Request
Response to Received Multi-Byte Parameter Data Request
Sequential Channel Data Request
Set Communication Watchdog Timer
Set ICI Local Channel Amount
Power Supply
120/240 Vac (85 to 264 Vac), 47 to 63 Hz (std.)
Power Requirements
2
25W, 45VA (max.)
Environmental Requirement
Ambient Temp. Range: 0 to 50°C (32 to 122°F)
Connections
Forty screw terminals on rear for:
AC Input
Local Instrument Link
RS-232C Computer
RS-422 Computer
Communication Protocol
RS-232C or RS-422, selectable
The auxiliary computer port and diagnostic port connectors
are provided on the Serial Port Communications board for
maintenance activities.
Data Transmission
The Cable Adapter Board, which is available as an accessory,
provides DB-25 male/female connectors for use with data
set/data terminal equipment to connect the Model 320 with a
computer or modem. The Accessory Board mounts on
RS-232C screw terminals. Cables are available separately.
Transmission Speed
Switch Selections
Random or sequential access to/from Local Instrument Link
with up to 256 channels of data available per access.
MPU Board:
Data transmission (Binary, ASCII)
Link Acknowledge Delay (enable/disable)
Null Filled Data (enable/disable)
Data Security Level (none, record, parameter, local)
Jumper Selections
Serial Port Communications Board:
Baud Rate
Protocol Selection
Diagnostic Port Baud Rate
LIL Station Address
Binary or ASCII, selectable
Baud Rates: 38400, 19200, 9600, 4800, 2400, 1200 (Bell 212
type modem), 300 (Bell 103 type modem)
Link Access
Data Format
Available formats:
One start bit, 7 data bits, 1 stop bit; even parity
One start bit, 7 data bits, 1 stop bit; odd parity
One start bit, 8 data bits, 1 stop bit; no parity
One start bit, 8 data bits, 1 stop bit; odd parity
Error Checking
Parity bit (even/odd) or checksum word, selectable
Data Security
Four Levels:
NONE - All commands available
RECORD - No record information may be sent
from computer (configuration data)
PARAMETER - No parameter information may
be sent from computer (process data)
LOCAL - No information may be sent from
computer (except ICI status information)
2.34
Integrators
Model 320 Independent Computer Interface
Ordering data
Model Number
ICI
Power Supply
•120/240 Vac (85-264 Vac), 47-63 Hz
Mounting Case
• Standard, 40-screw terminals
• Not Required
Operator's Panel
• Delete - Panel not included (Can only
be furnished with Mounting Case
Option N)
• Standard - Blank Panel
Reserved for Future Use
• Reserved for Future Use
Hazardous Area Classification
• Not Required
• FM/CSA Approved for Class I,
Div. 2, Groups A, B, C, & D
Order No.
Accessories
320■ ■ ■ ■ -■
▲▲▲▲ ▲
A
2
N
RS-232C Cable Adapter Board (P/N 15936-11) - Cable
adapter board for use with data set/data terminal equipment
using DB25 connectors. Board provides male and female
DB25 connectors and mounts on RS-232C screw terminals
for the Siemens 320. Recommended for RS-232C equipment.
Cables available separately.
DB25 Cables - Completely assembled, shielded RS-232C
cables for use with adapter board (see above). Cables have
DB25 male and female connectors at opposite ends.
Cast metal connector housings provide protection against
electrical noise. Select according to required length.
D
N
10 ft. (3 m) length: P/N 15918-11
25 ft. (7.62 m) length: P/N 15918-12
50 ft. (15.24 m) length: P/N 15918-13
N
N
F
DB9F/DB25M Cable Adapter - P/N 16801-4
2.35
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