Communication parameter group07
PARAMETER DESCRIPTION 178
In query information sent by Master, the address cannot be processed by Slave
(outside the addresses listed in the table, the reserved parameters, the
parameters not allowed to be read, the parameters not allowed to be written).
In query information sent by Master, the data cannot be processed by the Slave
(outside parameter writing range, required specified mode, other error, etc.).
Note: When read multiple parameters, it is not an error even if they are reserved parameters.
In data sent by Master, Slave (inverter) will detect the following errors, but will not respond when it detects the error.
Error detection item table:
The parity test for data received by the inverter is different from the parity test set at the initial stage.
The stop byte of the data received by the inverter mismatches the stop byte set at the initial stage.
When the inverter is receiving data, the host computer sends the next set of data before the inverter
finishes receiving the current one.
The LRC/CRC calculated by the inverter according to the received data is different from the received
LRC/CRC.
 Communication example:
Example 1. CU operation mode written by communication.
Step 1: Upper controller modifies operation mode of inverter.
Step 2: After receiving and processing the data without error, inverter will send a reply to upper controller:
Example 2. Read parameter 02-15(P.195) value by upper controller
Step 1: Upper controller sends message to inverter to read 02-15(P.195) value. 02-15(P.195) address is H00C3.
Step 2: After receive and processing the data without error, inverter will send 02-15(P.195) to upper controller.
Decimal form of H1770 is 6000 and the unit of 02-15(P.195) is 0.01, 02-15(P.195) is 60 (6000 x 0.01 = 60).
Example 3. Upper controller change inverter 02-15(P.195) value to 50.
Step 1: Upper controller sends message to inverter to write 50 into 02-15(P.195).
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