Deep Sea Electronics Plc 5220

55xGenComm1_29 www.wellfut.com 0755-27153030 0755-27732300
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TABLE OF CONTENTS
INTRODUCTION....................................................................................................6
ACKNOWLEDGEMENTS ......................................................................................6
DATA COMMUNICATIONS OVERVIEW...............................................................7
DSE P810 description .................................................................................................................. 7
RS232 description........................................................................................................................ 7
RS485 description........................................................................................................................ 8
Communication protocol description ........................................................................................ 8
GENERAL DEFINITIONS AND REQUIREMENTS OF GENCOMM......................9
MULTIPLE MASTERS...........................................................................................9
MODBUS FUNCTIONS USED.............................................................................10
Function 3 - Read Multiple Registers....................................................................................... 10
Query message......................................................................................................................... 10
Normal response message....................................................................................................... 10
Exception response message .................................................................................................. 11
Unimplemented register and field values ................................................................................. 11
Sentinel values for instrumentation .......................................................................................... 12
Function 16 - Write Multiple Registers..................................................................................... 13
Query message......................................................................................................................... 13
Normal response message....................................................................................................... 13
Exception response message .................................................................................................. 13
EXCEPTION RESPONSES..................................................................................14
Exception response message .................................................................................................. 14
Extended exception codes........................................................................................................ 15
LANGUAGE CODES ...........................................................................................18
Language codes ....................................................................................................................... 18
MODBUS REGISTERS DEFINED .......................................................................22
Index of Register Pages............................................................................................................. 23
GENCOMM PAGE 0 - COMMUNICATIONS STATUS INFORMATION..............24
Registers ..................................................................................................................................... 24
Password status ....................................................................................................................... 25
EXAMPLE : Reading the password status from the control module. ....................................... 25
GENCOMM PAGE 1 - COMMUNICATIONS SETTINGS.....................................26
Notes on passwords.................................................................................................................. 26
Registers ..................................................................................................................................... 27
Baud rate .................................................................................................................................. 28
EXAMPLE : Using Link500Plus to change module slave ID and Baud rate ............................ 29
EXAMPLE : Sending a password to the control module. ......................................................... 30