Hitachi WJ200-001S Instruction Manual page 341

B6
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.
Slave Address 1-247 in Modbus specification. When master address the slave

250-254, broadcast toward specific slave address. Slave doesn't answer back. And
this function is valid for the write command (05h, 06h, 0Fh, 10h)
Slave address Broadcast to
250（FAh） Broadcast to Slave address 01to 09
251（FBh） Broadcast to Slave address 10 to 19
252（FCh） Broadcast to Slave address 20 to 29
Broadcast to Slave address 30 to 39
253（FDh）
254（FEh） Broadcast to Slave address 40 to 247