Mitsubishi Electric 800 Series Instruction Manual page 64

• Data check time
Item
Various monitors, operation command,
Frequency setting (RAM)
Parameter read/write,
frequency setting (EEPROM)
Parameter clear / all clear
Reset command
• Query
A message is sent to the slave (for instance, the inverter) having the address specified by the master.
• Normal Response
After the query from the master is received, the slave executes the request function, and returns the corresponding normal
response to the master.
• Error Response
When an invalid function code, address or data is received by the slave, the error response is returned to the master.
This response is appended with an error code that indicates the reason why the request from the master could not be
executed.
This response cannot be returned for errors, detected by the hardware, frame error and CRC check error.
• Broadcast
The master can broadcast messages to all slaves by specifying address 0. All slaves that receive a message from the
master execute the requested function. With this type of communication, slaves do not return a response to the master.
NOTE
• During broadcast communication, functions are executed regarded of the set inverter station number (Pr.331).
Check time
<12 ms
<30 ms
<5 s
No answer
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PARAMETER
4