5.Description of Function Codes
EM15 User's Manual
70
bA-03
Broadcast address
Default
1
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.
The address is unique; it is base of point to point communication between host computer and frequency inverter.
bA-04
Modbus response delay
Default
2 ms
Setting Range
0~20 ms (Only valid for Modbus)
Response delay: it refers to the interval time from the inverter finishes receiving data to response data back to the host
machine. If the response delay is less than the system processing time, then the response time is based on the time of
the system processing. If the response delaying 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, and then sending back data to
host machine.
bA-05
Communication timeout
Default
0.0s
Setting Range
0.0s:invalid
0.1s~60.0s
Valid for Modbus
When this parameter is set to 0.0s, the communication interface timeout function is invalid.
When the function code is set to a value, if the interval time between this communication and the next communication
is beyond the communication timeout, the system will report communication failure error (Err16). At normal
application, it will be set as invalid. If in the continuous communication system, setting this parameter, you can
monitor the communication status.
bA-06
Modbus protocol data transmission format selection
Default
31
Setting
Range
Unit's digit: Modbus protocol.
0
Non-standard Modbus protocol
1
Standard Modbus protocol
Ten's digit: Profibus-DP
0
PP01
1
PP02
2
PP03
3
PP05
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 appendix .
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.
5.11 Group bb: Fault and Protection
bb-00
G/P type selection
Default
1
Setting
Range
0
P type
1
G type