B6

Network Protocol Reference

Transmission procedure

The transmission between the external control equipment and the inverter takes the procedure below.

Appendix B

Query - A frame sent from the external control equipment to the inverter

Response - A frame returned from inverter to the external control equipment

The inverter returns the response only after the inverter receives a query from the external control equipment and does not output the response positively. Each frame is formatted (with commands) as follows:

Frame Format

Header (silent interval)

Slave address

Function code

Data

Error check

Trailer (silent interval)

Message Configuration: Query

Slave address:

This is a number of 1 to 32 assigned to each inverter (slave). (Only the inverter having the address given as a slave address in the query can receive the query.)

When slave address “0” is specified, the query can be addressed to all inverters simultaneously. (Broadcasting)

In broadcasting, you cannot call and loop back data.

Page 233
Image 233
Hitachi X200 Series Network Protocol Reference, Transmission procedure, Message Configuration Query, Slave address