BENSHAW RSi H2 Series - Modbus-RTU Protocol

Communications
308
890053-00-02
Currently Registered Macro Group Parameters
Address
Parameter
Assigned Content by Bit
0h0240
Macro Grp. Code 1
Parameter value registered at U&M > MC ➔ 1
0h0241
Macro Grp. Code 2
Parameter value registered at U&M > MC ➔ 1
.
.
.
.
.
.
.
.
.
0h02A2
Macro Grp. Code 98
Parameter value registered at U&M > MC ➔ 98
0h02A3
Macro Grp. Code 99
Parameter value registered at U&M > MC ➔ 99
10.3.6 Modbus-RTU Protocol
10.3.6.1 Function Code and Protocol
In the following section, station ID is the value set at COM-01 (Int485 St ID), and the starting
address is the communication address (starting address size is in bytes). For more information
about communication addresses, refer to 10.3.7 Compatible Common Area Parameter on page
311.
Reading up to 8 Consecutive Inverter Parameters Based on the Set Number - Read Holding
Register (Func. Code: 0x03) and Read Input Register (Func. Code: 0x04)
Read Holding Registers (Func. Code: 0x03) and Read Input Registers (Func. Code: 0x04) are
processed identically by the inverter.
Codes
Description
Start Addr.
Starting address 1 of the inverter parameters (common area or keypad) to
be read from.
No. of Reg.
Number of the inverter parameters (common area or keypad) to be read.
Byte Count
Byte number of normal response values based on the number of registers
(No. of Reg).
Except. Code
Error codes
10.3.6.1.1 Request
Slave Station
ID
Func. Code
Start Addr
(Hi)
Start Addr
(Lo)
No of Reg
(Hi)
No of Reg
(Lo)
CRC (Lo)
CRC (Hi)
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
10.3.6.1.2 Normal Response
Slave Station
ID
Func.
Code
Byte
Count
Value (Hi)
Value
(Lo)
…
Value (Hi)
Value
(Lo)
CRC (Lo)
CRC (Hi)
1 byte
1 byte
1 byte
1 byte
1 byte
…
1 byte
1 byte
1 byte
1 byte
* The number of Value(Hi) and Value(Lo) is changed by the [Request No. of Reg].