EM15 User’s Manual
Appendix I
125
The higher the baud ratio is, the faster the communication is.
bA-02
Modbus Data format
Default
0
Setting
Range
0
No check, data format <8,N,2>
1
Even parity check, data format<8,E,1>
2
Odd Parity check, data format<8,O,1>
3
No check, data format <8,N,1>
The host computer and frequency inverter setup data format must be consistent, otherwise, communication is
impossible.
bA-03
Broadcast address
Default
0
Setting Range
1~249 (0: Broadcast address) Valid for Modbus
When the local address is set to 0, that is, broadcast address, it can realize the broadcast function of host computer.
bA-04
Modbus response delay
Default
2 ms
Setting Range
0~20 ms (Only valid for Modbus)
Response delay time: it refers to the interval time from the inverter finishes receiving data to sending data to the
host machine. If the response time is less than the system processing time, then the response delay time is based
on the time delay of the system processing time. If the response delay time is more than the system processing
time, after the system processes the data, it should be delayed to wait until the response delay time is reached, then
sending data back to host machine.
bA-05
Communication timeout
Default
0.0s
Setting Range
0.0s:invalid
0.1s~60.0s
Valid for Modbus
When the function is set to 0.0s, the communication interface timeout parameter is invalid.
When the function code is set to time value, if the interval time between the communication and the next
communication is beyond the communication timeout, the system will report communication failure error (Err16).
At normal circumstances, it will be set as invalid. If in the continuous communication system, set this parameter,
you can monitor the communication status.
bA-06
Modbus protocol data transmission format selection
Default
1
Setting
Range
Unit's digit: Modbus protocol.
0
Non-standard Modbus protocol
1
Standard Modbus protocol
bA-06=1: Select standard Modbus protocol.
bA-06=0: When reading the command, the slave machine return is one byte more than the standard Modbus
protocol’s, for details, refer to communication data structure of this protocol.
bA-07
Communication reading current resolution
Default
0
Setting
Range
0
0.01A
1
0.1A
It is used to confirm the unit of current value when the communication reads the output current.
