MAXA i-32V5C MIDI 0121 - Modbus Communication; Modbus Configuration and Registers

29
Controllo per i-32V5 MIDI Air/water inverter chillers and heat pumps with axial fans
Alarm code DESCRIPTION 
E042 Insucient heat exchange alarm Macchine/Sanitary
E050 High DHW tank temperature alarm -
E611 Water inlet probe failure Machine
E621 Water outlet probe failure Machine
E631 Compressor sucon probe failure Machine
E641 Compressor discharge probe failure / high pressure switch intervenon Machine
E651 External air / fan thermal probe failure Machine
E661 DHW probe failure (ST6) Machine
E671 Fault in remote plant probe (ST7) Machine
E691 Low pressure transducer failure Machine
E701 High pressure transducer failure Machine
E711 Fault in voltage input 0-10V DC Machine
E801 Inverter communicaon meout Compressor
E851 Inverter hardware problem Compressor
E861 Motor current too high Compressor
E871 High inverter heatsink temperature Compressor
E881 Supply voltage out of limits (DC bus) Compressor
E891 Compressor not connected Compressor
E901 Wrong compressor model Compressor
E911 Overload protecon Compressor
E921 PFC/POE overcurrent Compressor
E931 Internal communicaon error Compressor
E941 PFC fault Compressor
E951 Heatsink and/or ambient temperature sensor fault Compressor
E961 Abnormal condion Compressor
E971 EEPROM error Compressor
24. MODBUS VARIABLES
The control has the following modbus conguraon by default:
• Baud rate: 9600
• Parità: EVEN
• Data bit: 8
• Stop bit: 1
• Device ID: 1
To congure the Modbus communicaon according to your requirements, you must modify the following parameters:
Parameter VALUE 
H124
0 Baud rate 4800 bit/s
1 Baud rate 9600 bit/s
2 Baud rate 19200 bit/s
3 Baud rate 38400 bit/s
H125
0 Parity NONE e stop bit 2
1 Parity ODD e stop bit 1
2 Parity EVEN e stop bit 1
3 Parity NONE e stop bit 1
H126 1 ÷ 120 Serial address (Device ID)
The following table lists the Modbus registers of the control:
 Format Bit R/W  Name  Note
1 INT - R -
Data version
Firmaware version
2 INT - R - Firmware release
3
BYTE (H) - R - Firmware sub-release
BYTE (L) - R - Firmware creaon day
4
BYTE (H) - R - Firmaware creaon month
BYTE (L) - R - Firmware creaon year
10 BOOL
0 R -
Digital inputs
ID1 (ow swich)
1 ID 2 If acve
2 ID 3 (on/o) Acve by default