Alpha 6000S series User Manual page 202

Function Name of
Code Parameter
Motor
protection
Pd.02 sensor
Input
Passage
Braking
torque
P8.25
setting
source
*Note 1: Only when the "Communication setting" passage is selected, can the command be written into the
corresponding register in the above table. Otherwise, 02h will be reported.
*Note 2: If the Baud rate selection and the parity check selection are revised, new setting will not become effective
until the inverter is stopped first and then restarted. Setting of these two items for the upper and lower computers
should be the same. Otherwise, communication cannot be established or there will be errors with communication.
*Note 3: When the frequency inverter address is set as 0, the inverter will not receive the communication command,
including the broadcast command. When the frequency inverter address is larger than 0, the new address will
become effective once it is revised.
*Note 4: To be compatible with other communication frequency commands of other series of frequency inverters by
our company, please set the communication frequency command unit, e.g. set the frequency as 50Hz. If the
frequency command sent by PLC is 01F4H, 1 should be selected. After the frequency inverter receives the frequency
command, it will be converted to 50.00Hz automatically. If 1388H is sent, 0 should be selected. The system will treat
it as 50.00Hz.
 Transmission Period Limit
In order to reduce the packet loss ratio caused by the communication disturbance and get the best
communication effect, please limit the data transmission period in the host station to ensure both data
transmission and receiving are normal.
Pb.00 Baud Rate
Selection
0: 1200
1: 2400
2: 4800
3: 9600
4: 19200
5: 38400
*Notes: With the parity check manner selected, the user can obtain the quickest communication response.
The minimum transmission period includes the time from data transmission to receiving of correct data.
If the transmission period is lower than the minimum transmission period, the data received by the host station may
be garbled.
201
Setting Range
0: Terminal AI1
1: Terminal AI2
2: Terminal AI3 (Reserved for
3004GB and the below)
3: Impulse input
4: Communication setting
0: consistent with the final
driving torque setting value
calculated for P8.11
1: AI1
2: AI2
3: AI3 (Reserved for 3004GB
and the below)
4: PULSE setting
5: Communication setting
Minimum Transmission
Period ms
(Parity Check)
220ms
110ms
65ms
50ms
35ms
17ms
Appendix 4 Use of MODBUS Communication
Ex-factory
Setting
0
0
Suggested Transmission Period ms
(Applicable to various check manners)
250ms
150ms
100ms
90ms
80ms
50ms
After the
communication function
Revision
is selected, MODBUS
can be written into the
register
× 000CH
0012H
×