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Communication
List of data number related to communications
1) Communication parameter
Address Pr No. Parameter name Range of
setting
Default
Function/Description
8060h
60
Device number
80h(128)
to
9Fh(159)
81h(129)
Set the device number of amplifier in com-
munication (Amplifier ID).
This value is the axis number in communi-
cation.
80h (128) is the device number for setting
control data (such as control start) by one
operation to all connected amplifiers. (No
response is made by amplifier.)
When the device number is set to 80h (128),
change of parameter and request for status
are ignored, therefore set to 81h (129) to
9Fh (159) normally.
8061h
61
Communication
speed
0 to 2
2
Set the communication speed of RS485
communication.
0: 2400 bps
1: 4800 bps
2: 9600 bps
8062h
62
Communication
standard
0 to 11
4
Set the communication standard of RS485
communication.
0: 8 bits, no parity, stop bit 1
1: 8 bits, no parity, stop bit 2
2: 8 bits, odd number parity, stop bit 1
3: 8 bits, odd number parity, stop bit 2
4: 8 bits, even number parity, stop bit 1
5: 8 bits, even number parity, stop bit 2
6: 7 bits, no parity, stop bit 1
7: 7 bits, no parity, stop bit 2
8: 7 bits, odd number parity, stop bit 1
9: 7 bits, odd number parity, stop bit 2
10: 7 bits, even number parity, stop bit 1
11: 7 bits, even number parity, stop bit 2
8063h
63
Communication
response time
10 to 1000
10
Communication response time is the short-
est time for setting transmission mode in
RS485 bus for response after the amplifier
has received communication data. Actual
data response time depends on the type
and data of order.
Unit [ms]
8064h
64
Retry times of
communication
0 to 9
9
Set the retry times of RS485 communica-
tion.
0 to 8: Number of retrials
9: No retrial
Address Pr No. Parameter name Range of
setting Default
Function/Description
8065h
65
Protocol timeout 1 to 255
2
Protocol timeout is the time allowed from
reception of a character code to reception
of the next one in communication. If normal
character code is not received within this
time, communication is timed out, and
received data is discarded. If timeout should
continue to occur, and the number of detec-
tions exceed the retry times, the amplifier
trips due to RS485 communication error.
Unit [seconds]
Change of parameters above is made effective when power is turned on.
• Time required for data transmission per byte is calculated by the following formula for
example in the case of 9600 [bps], 8 bits, parity present (even number or odd number),
and stop bit 1:
(1000/9600) × (1 + 8 + 1 + 1) = 1.14 [ms/byte]
Time is 4.58 [ms/byte] for 2400 [bps], and 2.29 [ms/byte] for 4800 [bps].
Note, however, actual communication time will be added time necessary for processing
received command, and necessary for switching between a line and transmission/
reception control.
2) Extension parameter (special command): 8103h to 81B0h
These are parameters to get motor status or to give commands to the amplifier.
Refer to P.81 “Communication command” for detail.
