2
CARLO GAVAZZI
CONTROLS
SERIAL COMMUNICATION PROTOCOL
UDM - USC
V1 R1
Page
Index
INDEX ........................................................................................................................................2
1 SERIAL COMMUNICATION PROTOCOL .............................................................................3
1.1 INTRODUCTION ...........................................................................................................3
1.2 FUNCTIONS .................................................................................................................3
1.2.1 Function 03 or 04 (read words) ………………………………………………………..4
1.2.2 Function 06 (write word) ...……………………………………………………………4
1.2.3 Function 08 (diagnostic function) ………………………………………………………..4
1.3 MEMORY AREA............................................................................................................5
1.4 IDENTIFICATION CODE ...............................................................................................5
2 RAM VARIABLES MAP .......................................................................................................6
2.1 VARIABLES MAP ............................................................................................................6
2.2 VARIABLE FORMAT......................................................................................................6
2.2.1 Measure, MAX and Min values ……………………………… …………………………..6
2.2.1.1 Reset of the MAX and Min values ………………………………………………6
2.2.2 Configuration ……………………………………………………………………………7
2.2.3 Alarms Status ……….…………………………………………………………………….8
3 EEPROM VARIABLE MAP.................................................................................................11
3.1 LSX / LSE / HSX configuration map ……………………………………………………………11
3.2 TRX configuration map …………..………………………………………………………………13
3.3 EEPROM CONFIGURATION DATA FORMAT...............................................................14
3.3.1 Password ..……………………………………………………………………………..14
3.3.2 Input Selection ………………………………………………………………………….14
3.3.2.1 LSX, HSX ..……………………………………………………………………14
3.3.2.2 TRX ……………………………………………………………………………15
3.3.3 Display ……………………………………………………………………………………..15
3.3.4 Scaling …………………………………………………………………………………….16
3.3.4.1 LSX, HSX ………………………………………………………………………..16
3.3.4.2 TRX ………………………………………………………………………..17
3.3.5 Linearisation ………………………………………………………………………………18
3.3.6 Set Points …………………………………………………………………………………19
3.3.7 Filter ……………………………………………………………………………………….20
3.3.8 Analog Output …………………………………………………………………………20
3.3.9 Serial Port ………………………………………………………………………………...20
3.3.10 Auxiliary Commands ………………………………………………………………….20
4 CRC CALCULATION ALGORITHM ....................................................................................21
5 HARDWARE SPECIFICATIONS.........................................................................................22
5.1 RS485 INTERFACE ...................................................................................................222
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