DRV-28 inverter
s Communication protocol
-276-
Parameter
address
Inverter
address
Continuous
write
command
CRC
Parameter
quantity
01
10
20 00
00 02
4A 08
Example 2: Set "Acceleration time" of the inverter whose address is 01H to 10s, and "Deceleration
time" to 20s.
Function
code
Name
Detailed parameter description
Default
value
Modi
fy
P00.11
Acceleration
time 1
Acceleration time is the time needed for accelerating
from 0Hz to Max. output frequency (P00.03).
Deceleration time is the time needed from
decelerating from Max. output frequency (P00.03) to
0Hz.
DRV-28 series inverter defines four groups of
acceleration and deceleration time, which can be
selected via multi-function digital input terminals
(P05 group). The acceleration/deceleration time of
the inverter is the first group by default.
Setting range of P00.11 and P00.12: 0.0–3600.0s
Depend
on model
○
P00.12
Deceleration
time 1
Depend
on model
○
The address of P00.11 is 000B, 10s is 0064H in the hexadecimal form, and 20s is 00C8H in the
hexadecimal form.
The command transmitted by the master is as follows:
Parameter
address
Inverter
address
Continuous
write
command
Number of
bytes
Parameter
quantity
01
10
00 0B
00 02
04
10s
00 64
20s
00 C8
CRC
F2 55
If the operation is successful, the following response is returned:
Parameter
address
Inverter
address
Continuous
write
command
CRC
Parameter
quantity
01
10
00 0B
00 02
30 0A
Note:
In the preceding command description, spaces are added to a command just for explanatory
purposes. In practical applications, no space is required in the commands.
9.4.8.4 Modbus communication commissioning example
A PC is used as the host, an RS232-RS485 converter is used for signal conversion, and the PC serial
port used by the converter is COM1 (an RS232 port). The upper computer commissioning software is
the serial port commissioning assistant Commix, which can be downloaded from the Internet.
Download a version that can automatically execute the CRC check function. The following figure
