Astralpool Compact 3 Titanium - English; Table of Contents

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1. INTRODUCTION TO MODBUS AND PRODUCT ............................................................... 5
1.1. Principle of Operation .............................................................................................................. 5
1.2. Basic Characteristics ................................................................................................................. 5
2. ELECTRICAL CONNECTIONS ............................................................................................. 6
3. CABLE CHARACTERISTICS ................................................................................................. 7
4. BUS ISOLATION AND TERMINATION RESISTORS ........................................................... 7
5. BOARD AND PANEL INDICATORS .................................................................................... 8
6. MODBUS FUNCTIONS ....................................................................................................... 9
6.1. Functions supported ................................................................................................................ 9
6.2. Exception Responses ................................................................................................................ 9
7. DEVICE DESCRIPTION AND CONFIGURATION ............................................................. 10
7.1. General description ................................................................................................................ 10
7.2 Operation diagram ................................................................................................................. 10
7.3 Address and baud rate selection ............................................................................................. 10
7.3.1 Address setting ................................................................................................................... 10
7.3.2 Baud rate selection ............................................................................................................. 11
7.4 Broadcasting .......................................................................................................................... 11
8 OPERATION MODES ...................................................................................................... 12
8.1 BASIC OPTIONS ...................................................................................................................... 12
8.1.1 TECHNICAL CONFIGURATION OPTIONS .............................................................................. 12
8.1.2 REQUEST WORD .................................................................................................................. 12
8.1.3 CHECKING STATUS .............................................................................................................. 13
8.1.4 TEMPERATURE PROBES READINGS ..................................................................................... 14
8.1.5 DIGITAL INPUTS ................................................................................................................... 15
8.1.6 REAL TIME ALARMS ............................................................................................................. 16
8.1.7 LATCHED ALARMS ............................................................................................................... 17
8.1.8 CHECKING COUNTERS ......................................................................................................... 18
9 BASIC MODBUS-RTU REGISTER MAP ........................................................................... 19
9.1 HOLDING TYPE REGISTERS (READ) FACTORY SETTINGS. ............................................................ 19
9.2. ALARMS & OPERATION HOLDING REGISTERS (READ/Write) ...................................................... 20
9.3. COUNTERS & TEST HOLDING REGISTERS (READ ONly) .............................................................. 20
9.4. INFORMATION ON THE HEATER INPUT TYPE REGISTERS (READ) ................................................ 21
9.5. HEATER CONFIG; COIL TYPE REGISTERS (READ/WRITE) ............................................................. 22
9.6. DISCRETE INPUT TYPE REGISTERS (READ) INFORMATION ON HEATER ....................................... 22
10. PRODUCT REVISION ................................................................................................... 23