Best E5 Series User Manual page 196

Chapter 7 Modbus Maintenance
ASCII 3A 30 31 30 36 30 30 30 32 30 46 41 30
Different response delays can be set for drive through parameters so as to adapt to specific
application requirements of various master stations; in RTU mode, the actual response delay is
not less than 3.5 characters, while in ASCII mode, the actual response delay shall not be less
than 1ms.
5. Protocol Function
The uppermost function of Modbus is to read and write parameters, and different parameters
determine different operation requests. Parameters operations supported by inverter Modbus
protocol are as shown in the table below:
Parameter
0x03
0x06
0x08
0x10
0x41
0x42
Functional parameters, control parameters and status parameters of the drive are all mapped
to read-write register of Modbus. Read-write characteristics and range of parameters comply
with the instructions of user manual of the drive. Group numbers of drive parameters are
mapped as high byte of register address, while in-group indexes are mapped as low byte of
register address. Drive control parameters and status parameters are all virtualized as drive
parameter groups. The corresponding relations between parameter group numbers and their
high bytes of register address are as shown in table below:
Appendix Table 5 High-byte register addresses mapped
Parameter Mapping register
group address, high byte
P00
P01
Table 7-4
Read drive functional parameters and running status parameters
Over-write individual drive functional parameters or control
parameters, which are not saved on power loss
Line diagnosis
Over-write multiple drive functional parameters or control parameters,
which are not saved on power loss
Write individual drive functional parameters or control parameters,
and save them to non-volatile storage unit
Parameter management
from parameter group numbers
Table 7-5
0x00
0x01
Meaning of parameter
Parameter group
P40
P41
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E5 User Manual
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Mapping register
address, high
byte
0x11
0x12