Communication parameter group 07
PARAMETER DESCRIPTION 208
*2) Waiting time set from 0 to 15 with 10ms unit. Example: set value 5 --->50ms.
*3) End symbol (CR, LF codes)
When performing data communication from
upper controller to inverter, CR and LF codes at the end of message will be
automatically set according to upper controller mode. At this time, inverter must also make necessary settings to cooperate with
upper controller. If only CR is selected, only one register is occupied; If both CR and LF are selected, two registers will be
occupied.
*4) Unit: 0---> Unit 1, 1---> Unit 0.1, 2---> Unit 0.01, 3---> Unit 0.001
*5) Error code:
Error code Error item
Communication error content
H01
Parity error
Parity check of data received by inverter is different from parity check initially set
H02
Sum Check
Error
Sum Check value calculated by inverter according to received data is different from received
Sum Check value
H03
Communication
protocol error
Structure of the data received by inverter is incorrect; or data has not been received within
specified time; or CR and LF codes are different from those initially set
H04
Frame error
Stop bit of data received by inverter is inconsistent with stop bit initially set
H05
Overflow error
When inverter is receiving data (not all data have been received yet), upper controller transmits
next data to it.
H0A
Wrong mode
Write when inverter is running or mode setting requirements are not met
H0B
Command code
error
A command code that cannot be processed by inverter is specified
H0C
Data range error
When setting parameters and frequencies, data outside the set range are specified
*6) When the parameter has the characteristics of 99999, the write-in or read-out of 99999 will be replaced by HFFFF.
*7)Request sum check code
ASCII-converted code of the data is added in binary code, and the lower bit (lower 8 bits) of the result (summation) is converted
to ASCII 2 bits (hexadecimal), which is called Sum Check Code.
Communication example:
Example 1. Upper controller sends a forward rotation command to inverter:
Step 1: Use the upper controller to send a FA command in Format A:
Sum Check calculation is: H30＋H30＋H46＋H41+H30+H30+H30+H30+H32=H1D9, take the lower eight bits D9 to
convert to ASCII code H44 and H39.
Step 2: After receive and processing the data without error, inverter will send reply to upper controller in Format C:
ACK
Inverter station
number 0
CR
H06
H30 H30
H0D
Example 2. Upper controller sends a stop rotation command to inverter:
Step 1: Use upper controller to send FA command in Format A:
ENQ
Inverter station
number 0
Command
code HFA
Waiting
time
Data
H0000
Check code
Sum Check
CR
H05
H30 H30
H46 H41
H30
H30 H30 H30 H30
H44 H37
H0D
Step 2: After receive and processing the data without error, inverter will send reply to upper controller in Format C:
ACK
Inverter station
number 0
CR
H06
H30 H30
H0D
ENQ
Inverter station
number 0
Command
code HFA
Waiting
time
Data
H0002
Check code
Sum Check
CR
H05
H30 H30
H46 H41
H30
H30 H30 H30 H32
H44 H39
H0D
