Santerno Sinus M - 13.5 Communication protocol (MODBUS-RTU); 13.6 Communication protocol (ES BUS); 13.6.1 Basic format

13-4
13.5 Communication protocol (MODBUS-RTU)
Use Modbus-RTU protocol (Open protocol).
Computer or other hosts can be Master and inverters Slaves. Inverter responds to Read/Write
command from Master.
Supported function code
Function code Description
0x03
Read Hold Register
0x04
Read Input Register
0x06
Preset Single Register
0x10
Preset Multiple Register
Exception code
Function code Description
0x01
ILLEGAL FUNCTION
0x02
ILLEGAL DATA ADDRESS
0x03
ILLEGAL DATA VALUE
0x06
SLAVE DEVICE BUSY
User define 0x14
1.Write Disable (Address 0x0003 value is 0).
2.Read Only or Not Program during Running.
13.6 Communication protocol (ES BUS)
13.6.1 Basic format
Command message (Request):
ENQ Drive No. CMD Data SUM EOT
1 byte 2 bytes 1 byte n bytes 2 bytes 1 byte
Normal response (Acknowledge Response):
ACK Drive No. CMD Data SUM EOT
1 byte 2 bytes 1 byte n * 4 bytes 2 bytes 1 byte
Negative response (Negative Acknowledge Response):
NAK Drive No. CMD Error code SUM EOT
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte
Description:
Request starts with “ENQ” and ends with “EOT”.
Acknowledge Response starts with “ACK” and ends with “EOT”.
Negative Acknowledge Response starts with ”NAK” and ends with “EOT”.
“Drive Number” is the number of drives and indicated in 2 bytes ASCII-HEX.
(ASCII-HEX: Hexadecimal consists of ‘0’ ~ ‘9’, ‘A’ ~ ‘F)