SuperLogics ADC-1R2 User Manual

ADC-1R2

I/O Module

Digital I/O

Analog I/O

SuperLogics

SuperLogics Inc. Phone 781-893-1600 300 Third Avenue Fax 781-893-0600 Waltham, MA 02451 Tech E-Mail support@superlogics.com

http://www.superlogics.com

Table of Contents

Introduction

Features .........................................................................................3

Quick Start ....................................................................................4

Communications

RS-232 Packet Information ...........................................................6

Commands and Responses

Command and Response Table ....................................................7

Command and Response Examples ............................................8

Analog Control Nibble ....................................................................9

Module Configuration

EEPROM Map .............................................................................10

EEPROM Map .............................................................................11

Sampling rates

Analog and digital ........................................................................12

Modes of Operation

Polled Mode .................................................................................12

Asynchronous Update Mode .......................................................12

Continuous stream Mode .............................................................13

Continuous stream Mode Configuration EEPROM Map ..............14

Continuous stream Mode Example ..............................................15

Digital I/O Technical Information

Digital I/O Characteristics ............................................................16

Digital I/O Port Configuration Example ........................................16

PWM Characteristics ...................................................................17

PWM Commands .........................................................................17

Analog I/O Technical Information

Analog I/O Characteristics ...........................................................18

Voltage References .....................................................................18

Analog Voltage Sampling ............................................................18

Analog Conversion ......................................................................19

Analog Offset Calibration .............................................................19

Analog Current Sampling ............................................................20

Analog Current Conversion .........................................................20

Digital & Analog I/O Port Specifications

Digital & Analog pin outs ..............................................................21

Module Specifications

PCB Illustrations ..........................................................................22

Dip switch and jumper settings ....................................................22

ADC-1R2 Series Module Specifications .......................................23

232 cabling and specifications .....................................................23

Peripherals

Analog Connection Board ...........................................................24

Signal Conditioner Board ............................................................24

DB15/DB25 Terminal Strip Board ...............................................24

Digital Interface Board ................................................................24

Introduction

Welcome to the SuperLogics ADC-1R2 Series of I/O modules. These modules using RS-232 communications are available in different configurations dependent on your needs and applications. In addition they are offered in an enclosure, or open allowing you the end user complete flexibility when determining the parameters for your project.

In addition SuperLogics offers a full line of peripheral attachment boards for analog signal conditioning and digital I/O interface. These boards conveniently plug into the main unit for ease of installation. See page 24.

Configurations for 232M200 models with enclosure are:

ADC-1R2-DIO 16 digital I/O ADC-1R2 16 digital I/O and 8 channels A/D conversion ADC-1R2-AOT 16 digital I/O and 8 channels A/D conversion and 2 channels D/A conversion

I/O Module features:

MPU: Microchip PIC16C65B EEPROM: Microchip 25C040 MPU Clock: 14.7456 Mhz Interface: RS-232 (single ended) Baud: 9600, 19200, 57600, 115200 (DIP switch selectable) LED: Bicolor diagnostic LED Watchdog: MPU has built-in watchdog timer POR: MPU contains timed Power On Reset circuitry Brownout: MPU brownout detection ciruictry built-in Temperature: 0° to 70°C (32° to 158°F) Commercial Temperature Range

-40° to 85°C (40° to 185°F) Industrial Temperature Range PCB: FR4 Power: 7.5Vdc to 15.0 Vdc (approx. 50 ma nominal power) Peripherals See the plug in peripheral section on page 24.

ADC-1R2 Series Features

• 16 Digital I/O lines

• 8 12 bit Analog Inputs

• 2 12 bit Analog Outputs

• PWM Output

• 32 bit Pulse Counter 1 Mhz

RS-232 Full duplex

50’ max.

ADC-1R2

12 bit analog

acquisition

digital I/O lines

Quick Start Instructions

You need the following:

• EZTerminal program available free on our website http://www.SuperLogics.com

• An open COMPORT on your PC

• Power supply PS9J (9VDC 400 ma unregulated)

• A cable to connect your PC (C9F9M-6 6 foot serial cable)

Make these DIP switch settings for 115,200 baud SW1: ON SW2: ON (These are factory default settings, see page 21)

Launch the EZTerminal program

1. Double click the icon in whatever area you have put the program.

2. Under “Settings” then choose Comport and select your RS-232 port, 115,200 Baud Rate, 8 Data Bits, NO PARITY, and 1 Stop Bits.

3. Under “Settings” now choose “Terminal Settings”, and check the “Append LF to incoming CR” box, and “Local echo typed characters” check box.

4. You may change the color of the transmitted and received characters by going under “Settings” and selecting “Colors” then “Transmit” or “Receive” and pick the color of your choice.

Step 1

Steps 2 & 3

Your First Command Now that you have a EZTerminal session running, your ready to power up the ADC-1R2 Series I/O Module. After powering up your ADC-1R2 Series Module, EZTerminal will

receive a welcome message from the unit indicating you are ready to provide your first command.

RS-232 Firmware Version 3.1 Command:

• Typethe letter V and the Enter Key

• You should see V30 on the screen

• NOTE: Make sure to type CAPITAL V, not lowercase v!

After your first command, see Commands and Responses section for more commands.

Screenshots and setup instructions performed running EZTerminal on a PC installed with Microsoft® Windows® XP Operating System.

Step 3

Step 4

Step 2

Communications

The SuperLogics ADC-1R2 Series I/O Modules support RS-232 communications interface using simple ASCII commands. A carriage return (decimal code 13 or Hex code 0x0D) marks the end of each command. Line feeds (decimal code 10 or Hex code 0x0A) are ignored.

RS-232 Interface:

• RS-232 operates Full Duplex

• RS-232 modules can also enter Continuous Stream Mode whereby the module is

configured via EEPROM settings to continuously send data to output its current Digital, Counter or Analog readings.

RS-232 Command Format

NOTE

• All numeric data is represent as ASCII Hexadecimal integers (values x/y in the

Command and Response table)

• If a module receives an illegal or improperly formatted command, Error Response is

sent.

• All ASCII characters are CASE SENSITIVE (use all capital letters!)

RS-232 Command Format

carriage return

13 (0x0D hex)

Command/Response

ASCII

Commands and Responses v3.0 Firmware

Command

Sent by Host

Response

Sent by I/O Module

Description

V Vxy Firmware version x.y

I Ixxyy Input digital port status

xx = PORT1 yy = PORT2

Also returns current output port status

Oxxyy O Output digital port:

xx = PORT1 yy = PORT2)

Txxyy T Set digital direction:

xx = PORT1 yy = PORT2 bit set(1) = Input, bit clear(0) = Output

G Gxxyy Get current digital direction:

xx = PORT1 yy = PORT2 bit set(1) = Input, bit clear(0) = Output

N Nxxxxxxxx Get Pulse Counter

(xxxxxxxx 32 bit counter value)

M M Clear Pulse Counter

Qy Qyxxx Bipolar sample analog (y control nibble,

xxx analog value)

Uy Uyxxx Unipolar sample analog (y control niblle,

xxx analog value)

Lyxxx L D/A output (y channel setting 0 or 1,

xxx 12 bit D/A output)

K Kxx Get receive error count (xx current count)

J J Clear receive error count

Pxxyyy P PWM (xx = PWM frequency, yyy = PWM duty)

Wyyxx W Write EEPROM (yy address, xx value)

Ryy Rxx Read EEPROM (yy address in command, xx

value in reponse)

S S Start continuous stream mode

H H Halt continuous stream mode

Z Z Reset CPU

X Command error response

Commands and Responses

The following table illustrates actual command and response data for an RS-232 interface.

NOTE:

• All numeric data is represent as ASCII Hexadecimal integers.

• The symbol ↵ equates to a carriage return (decimal 13, hex 0x0D).

Command

Sent by Host

Response

Sent by I/O

Description

V↵ V30↵

Module Firmware version 3.0

I↵ IFF00↵

Input digital port [PORT1 bits0-7 ON] [PORT2 bits0-7 OFF] Note: this command also returns the current digital output

O007F↵ O↵

Output digital port [PORT1 bits 0-7 OFF] [PORT2 bit 7 OFF, bits 0-6 ON]

TFF80↵ T↵

Set digital direction [PORT1 bits 0-7 INPUT] [PORT2 bit 7 INPUT, bits 0-6 OUTPUT]

G↵ GFF80↵

Get current digital direction [PORT1 bits 0-7 INPUT][PORT2 bit 7 INPUT, bits 0-6 OUTPUT]

N↵ N0000000F↵

Get pulse counter: Current count = 15

M↵ M↵

Clear pusle counter: Current count = 0

Q1↵ Q100F↵

Bipolar analog control nibble = 0x1 Analog reading = 0x00F

U8↵ U840F↵

Unipolar analog control nibble = 0x8 Analog reading = 0x40F

L1800↵ L↵

D to A Output Channel 1 = 2.5 Volts

K↵ K00↵

Current receive errors = 0

J↵ J↵

Clear receive error count: Current receive errors

P4801F↵ P↵

PWM freq = 50499 Hz, PWM duty = 10.6%

W0410↵ W↵

Write EEPROM Address 0x04 with value 0x10

R04↵ R10↵

Read EEPROM Adress 0x04 (value is 0x10)

S↵ S↵

IFF00↵ Q100F↵ IFF00↵ Q100F↵

START continuous stream mode See Modes of Operation section

This example illustrates continuous stream mode configured to continuously update with Input Digital Port command and Query Analog command with control 0x1. The module

continues until a command H↵is received.

H↵ H↵

HALT continuous stream mode

Z↵ Z↵

Reset CPU (forces a watchdog timeout)

Analog Control Nibble and Example

The ADC-1R2 Series I/O modules equipped with analog inputs utilizes the Linear Technologies LTC1296 analog to digital conversion chip. In the process of performing a data sample, the user sends a control nibble to the ADC-1R2 Series module. The ADC-1R2 Series module in turn performs a data conversion using the control nibble and transmitts a response data sample back. The following table lists each of the 16 possible analog configurations.

NOTE

• All numeric data is represent as ASCII Hexadecimal integers

• The symbol ↵ equates to a carriage return (decimal 13, hex 0x0D)

• See Analog I/O Technical Information section for sample to volts conversion

Control Nibble Analog Sample

0 Differential: CH0+ CH1-

1 Differential: CH2+ CH3-

2 Differential: CH4+ CH5-

3 Differential: CH6+ CH7-

4 Differential: CH0- CH1+

5 Differential: CH2- CH3+

6 Differential: CH4- CH5+

7 Differential: CH6- CH7+

8 Single Point: CH0

9 Single Point: CH2

A Single Point: CH4

B Single Point: CH6

C Single Point: CH1

D Single Point: CH3

E Single Point: CH5

F Single Point: CH7

Command

Sent by Host

Response

Sent by I/O Module

Description

Q0↵ Q000F↵

Bipolar sample differential CH0+ CH1- (Control = 0) Analog sample = 0x00F (decimal 15)

UA↵ UA123↵

Unipolar sample CH4 (Control = A ) Analog sample = 0x123 (decimal 291)

EEPROM Map:

Address Description

0x00 N/A - Reserved

0x01 N/A - Reserved

0x02 Data Direction Port 1

Bit set (1) = Input Bit clear (0) = Output

[factory default = 0xFF]

0x03 Data Direction Port 2

Bit set (1) = Input Bit clear (0) = Output

[factory default = 0xFF]

0x04/0x05 Asynchronous Update Mode Configuration

0x0000= No asynchronous updates 0x0001= Change Update on Digital Input or Counter change 0x0002...0xFFFF = Timed Update (Time = Value

1 milliseconds) 16 bits - upper byte in 0x04 lower byte in 0x05 [factory default = 0x0000]

0x06 Port 1 Power on Default output

[factory default = 0x00]

0x07 Port 2 Power on Default output

[factory default = 0x00]

0x08

See Note 1

Expander board flag (Opto-22® modules attached) 0x00 = No expander board attached 0xFF = Expander board attached (invert digital signals) [factory default = 0x00]

0x09/0x0A D/A Channel 0 Power on Default output

12 bits - upper nibble in 0x09, lower byte in 0x0A [factory default = 0x000]

0x0B/0x0C D/A/ Channel 1 Power on Default output

12 bits - upper nibble in 0x0B, lower byte in 0x0C [factory default = 0x000]

0x0D

See Note 2

A/D Channels sample clock rate 0x00 = Normal A/D Channels sample clock rate 0xFF = Slowed A/D Channels sample clock rate [factory default = 0x00]

0x0E N/A - Reserved

WARNING!

The I/O Module CPU must be reset before new EEPROM settings take effect.

NOTE

1. This flag is used when an expander board is attached. It allows for polarity interface to the industry standard I/O modules used with the expander board based on open collector logic that these modules use.

2. This is used to slow the A/D Channel sample clock rate. This may

help when the A/D

channels have a high impedance input attached.

EEPROM Map:

Address Description

0x0F N/A - Reserved

0x10 Continuous Stream Analog configuration count

0x00 = No analog stream readings 0x01... 0x08 = Number of analog queries

[factory default = 0x00]

See Modes of Operation Continuous Stream for locations 0x11...0x1A

0x11

Analog Query 1 - control byte - analog control nibble

0x12

Analog Query 2 - control byte - analog control nibble

0x13

Analog Query 3 - control byte - analog control nibble

0x14

Analog Query 4 - control byte - analog control nibble

0x15

Analog Query 5 - control byte - analog control nibble

0x16

Analog Query 6 - control byte - analog control nibble

0x17

Analog Query 7 - control byte - analog control nibble

0x18

Analog Query 8 - control byte - analog control nibble

0x19 Continuous Stream Digital Input configuration

0x00 = Digital Input status OFF 0xFF= Digital Input status ON

[factory default = 0x00]

0x1A Continuous Stream Pulse Counter configuration

0x00 = Pulse Counter status OFF 0xFF = Pulse Counter status ON

[factory default = 0x00]

0x1B ... 0xFF Available to User

Analog& Digital I/O Sampling Rates

Sampling rates are in samples per second for a single analog channel or 8 bit digital I/O port tested on Windows 2000 850 Mhz P3 with A/D clock running at full speed. Samples per channel = Sample rate ÷ number of channels being sampled.

Modes of Operation:

The SuperLogics I/O modules can operate in three operation modes:

1) Polled

2) Asynchronous Update

3) Continuous Stream.

These modes of operation can be used singularly or together in combination.

#1) Polled Mode

By far, the Polled Mode is the most common usage of the ADC-1R2 Series I/O modules. In this mode the Host computer sends a command to the I/O Modules which in turn sends an associated response back to the Host computer.

#2) Asynchronous Update Mode

The I/O Module sends data without the Host sending a command to poll the I/O Module in Asynchronous Update Mode.

NOTE: Asynchronous Update Mode is configured using EEPROM locations 0x04/0x05.

HOST

Computer

I/O Module

ADC-1R2

Series

1 - Command Sent by Host

2 - Response Sent by Module

Analog I/O

Baud Rate Polled Mode Continuous Mode

115,200 777 1515

57,600 412 847

19,200 143 310

9600 72 157

115,200 878 1884

57,600 456 960

19,200 156 319

9600 78 159

Digital I/O

Baud Rate Polled Mode Continuous Mode

#2a) Asynchronous Update Mode — State Change Update

When EEPROM locations 0x04/0x05 = 0x01, the ADC-1R2 Series I/O module enters an asynchronous update mode whereby any detected change on the Digital Input port or the Counter Capture port causes the I/O module to transmit data to the host.

#2b) Asynchronous Update Mode — Timed Update

When EEPROM locations 0x04/0x05 = 0x0002...0xFFFF, the ADC-1R2 Series I/O module enters a timed update mode whereby the I/O module will send data to the host after the specified time period has elapsed.

Time Period = Value (EEPROM locations 0x04/0x05) * .001 second

When using Asynchronous Update Mode, the I/O module uses the Continuous Stream Mode configuration to determine the data sent to the host.

#3) Continuous Stream Mode

The final mode of operation is Continuous Stream mode. This mode constantly sends or streams data to the host until the host halts the mode. In brief, the I/O Module can send 0 thru 8 analog samples, digital input status, and the counter capture status.

The I/O module uses parameters found in EEPROM locations 0x10 thru 0x1A to configure the Continuous Stream mode. Therefore, the EEPROM must be configured before engaging the Continuous Stream mode.

Continuous Stream Mode setup steps

1. Configure EEPROM locations 0x10 thru 0x1A

2. Begin Continuous Stream mode by sending command ‘S’ to the I/O Module

3. Halt Continuous Stream mode by sending command ‘H’ to the I/O Module

Status Change Data Sent by I/O Module

Digital Input port change Ixxxx

Counter Capture change Nxxxx

HOST

Computer

I/O Module

ADC-1R2

1 - Data Sent by Module

Value at EEPROM Location 0x04/0x05 Description

0x0000 Asynchronous Update Mode disabled

0x0001

State Change Update

Digital Input or Pulse Counter change

0x0002 to 0xFFFF Decimal Range 2 to 65535)

Timed Update

Time = Value * 1 millisecond Range = .002 second - 65.5 seconds

Continuous Stream Mode Configuration — EEPROM Locations

All parameters configuring the Continuous Stream mode are strored in EEPROM. See the following table for a description of the locations and the parameters. Use command ‘W’ to update EEPROM values.

Continuous Stream Mode Example

In this example, the I/O module EEPROM is configured to take 2 Analog samples and update the Counter status.

EEPROM Location 0x10 0x02 Take 2 Analog samples EEPROM Location 0x11 0x08 Sample 1 - Bipolar sample CH0 EEPROM Location 0x12 0x89 Sample 2 - Unipolar sample CH2 EEPROM Location 0x1A 0x01 Pulse Counter Status enabled

EEPROM Value Description

0x10 0x00...0x08

Analog Configuration

0x00 = No analog samples 0x01...0x08 = Number of analog samples

0x11

Sample 1

0x0y ... 0x0y 0x8y ... 0x8y