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User Manual of EM730/EM730E Series Inverter
326
Error PDU
Error code
1 byte
0x86
Exception code
1 byte
Below is an example of a request to change the drive control mode of the motor 1 (F00.01)
to “1: SVC”.
Request
Respond
Domain name
(0x)
Domain name
(normal)
(0x)
Domain name
(abnormal)
(0x)
Function
06
Function
06
Function
86
Register address Hi
00
Register address
Hi
00
Exception
code
03
Register address Lo
01
Register address
Lo
01
Register value Hi
00
Register value Hi
00
Register value Lo
01
Register value Lo
01
★
The function code 0x06 cannot be used if modified frequently, in order to avoid
damage to the inverter.
The user-defined function code 0x41 “change without saving” corresponds to the standard
common function code 0x06. Its definition is the same as that of the corresponding standard
function code (the same request, response and error PDU). The difference is that when the slave
responds to this user-defined function code, the corresponding value of RAM is changed only
and not stored in EEPROM (holding register).
For the function codes (e.g. F00.07) that are often modified, it is recommended to use the
function code 0x41 (you can change the main frequency source A by directly setting 7001H, as
detailed in 1.1.1.2 and 11.3.4), to avoid damage to the inverter. The specific operation is as
follows.
Request
Respond
Domain name
(0x)
Domain name
(normal)
(0x)
Function
41
Function
41
Register address Hi
00
Register address Hi
00
Register address Lo
07
Register address Lo
07
Register value Hi
13
Register value Hi
13
Register value Lo
88
Register value Lo
88