Measurement Computing PCI-COM422/485 - Manual (Page 3)

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TABLE OF CONTENTS
1. INTRODUCTION 1
2. INSTALLATION 2
2.1 SOFTWARE INSTALLATION 2
2.2 FACTORY DEFAULT PORT CONFIGURATION: 2
2.3 HARDWARE INSTALLATION 3
2.4 SET UP THE COM PORT PARAMETERS 3
2.4.1 IF YOU ARE USING WINDOWS 95 OR 98: 3
2.4.2 IF YOU ARE USING WINDOWS NT: 3
2.4.3 TEST THE COM PORTS FOR PROPER OPERATION (COMAPP.EXE) 5
2.5 RS-485 AUTO-ENABLED MODE 6
2.6 EXTENDED BAUD RATE OPERATION 6
2.6.1 WINDOWS 95 OR 98 SPECIFIC CONFIGURATION 7
2.6.2 WINDOWS NT SPECIFIC CONFIGURATION 8
2.6.3 RESETTING CONFIGURATION ON POWER UP 8
3. HARDWARE CONNECTIONS 10
3.1 DB9F CONNECTIONS 10
3.2 PORT IDENTIFICATION 10
3.3 CHANGING THE COM PORT ASSIGNMENTS 10
3.4 STANDARD COM PORT CONFIGURATIONS 11
3.5 TERMINATION JUMPER SETTINGS
11
4. REGISTER MAP 12
4.1 REGISTER MAP OVERVIEW 12
4.2 REGISTER DESCRIPTIONS 12
4.2.1 INTERRUPT STATUS/CONTROL12
4.2.2 PORT 1 CLOCK SELECT / INTERRUPT STATUS
13
4.2.3 PORT 2 CLOCK SELECT / INTERRUPT STATUS 13
5. SPECIFICATIONS 15
6. TROUBLESHOOTING Q/A: 17