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3. SIGNALS AND WIRING
(3) Speed setting in speed control mode
(a) Speed command and speed
The servo motor is run at the speed set in parameter No.8 (internal speed command 1) or at the speed
set in the applied voltage of the analog speed command (VC). A relationship between analog speed
command (VC) applied voltage and servo motor speed and the rotation directions determined by the
forward rotation start (ST1) and reverse rotation start (ST2) are as in (a), (1) in section 3.6.2.
Generally, make connection as shown below.
ST2
DOCOM
P15R
VC
LG
SD
ST1
Japan resistor
RRS10 or equivalent
(Note)
2k
2k
Servo amplifier
Note. For the sink I/O interface. For the source I/O interface, refer to section 3.8.3.
(b) Speed selection 1 (SP1), speed selection 2 (SP2) and speed command value
Choose any of the speed settings made by the internal speed commands 1 to 3 using speed selection 1
(SP1) and speed selection 2 (SP2) or the speed setting made by the analog speed command (VC).
(Note) Input device
Speed command value
SP2
SP1
0
0
Analog speed command (VC)
0
1
Internal speed command 1 (parameter No.PC05)
1
0
Internal speed command 2 (parameter No.PC06)
1
1
Internal speed command 3 (parameter No.PC07)
Note. 0: off
1: on
By making speed selection 3 (SP3) usable by setting of parameter No.PD03 to PD08/PD10 to PD12,
you can choose the speed command values of analog speed command (VC) and internal speed
commands 1 to 7.
(Note) Input device
Speed command value
SP3
SP2
SP1
0
0
0
Analog speed command (VC)
0
0
1
Internal speed command 1 (parameter No.PC05)
0
1
0
Internal speed command 2 (parameter No.PC06)
0
1
1
Internal speed command 3 (parameter No.PC07)
1
0
0
Internal speed command 4 (parameter No.PC08)
1
0
1
Internal speed command 5 (parameter No.PC09)
1
1
0
Internal speed command 6 (parameter No.PC10)
1
1
1
Internal speed command 7 (parameter No.PC11)
Note. 0: off
1: on
Driver