Fuji Electric ALPHA5 Smart, User Manual

Page: 502 / 636

CHAPTER 13 RS-485 COMMUNICATIONS
13-14
Modbus RTU Communications
13
(3) Message examples
Shows a message example to write in immediate speed, immediate acceleration time and
communication CONT signal, and read out feedback speed, effective torque, and motor current.
The write in start address is 6000H, and the read out start address is 6008H.
First, set parameter Nos. for the free assignment of addresses for parameters PA3_41 to PA3_44.
After setting, reboot to enable the settings.
PA3_41: 007993292
PA3_42: 00000000 (default)
PA3_43: 00040500
PA3_44: Set 00000000 (default)
<Query example>
Station No.
1 byte
01
・ When the amplifier station no. is " 1 ".
FC 1 byte 17
60
Read out start
address
2 bytes
08
･･･
Specify the read out first address.
00
No. of registers
2 bytes
06
･･･ Specify 0006h as the number of data 3×2.
60
Write in start
address
2 bytes
00
･･･
Specify the write in first address.
00
No. of registers 2 bytes
06
･･･
Specify 0006h as the number of data 3×2.
No. of data bytes 1 byte 0C
･･･
Specify 3×4 = 0Ch .
00 ･･･
01
Specify immediate speed: 186A0h (1000
r/min) .
86
Data 1 4 byte
A0
00 ･･･
00
Specify immediate acceleration time: 3E8h
(100 ms) .
03
Data 2 4 byte
E8
00
･･･
00
Specify communication CONT signal: servo
ON and FWD.
00
Information
Data 3 4 byte
03
CC
CRC check
16 bits
(2 bytes)
17