7   Parameter Details
7 - 26
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
7-4 Analog Control Parameters
Explanation of Set Values
• Select the speed command in the speed control mode. The Servo Drive has the internally set speed 
function that enables simplified speed control via contact inputs.
Explanation of Set Values
• This parameter reverses the polarity of the internally set speed command. It is used to change the 
motor rotation direction with the polarity of the command signal from the host system intact.
• The default setting for this parameter is 0. By rotating to the reverse direction with the +command 
keeps the compatibility with all OMNUC W-Series Servo Drives.
• If you configure a servo drive system which comprises a Servo Drive set to the speed control mode 
and an external Position Control Unit, be sure that the polarity of the speed command signal from the 
Position Control Unit matches the polarity set in this parameter. Otherwise, the Servomotor may 
operate abnormally. 
Pn300
Command Speed Selection
Setting 
range
1 to 3 Unit – Default 
setting
1
Cycle the 
power supply
–
Set 
value
Description
0 Reserved (Do not set.)
1 No. 1 Internally Set Speed to No. 4 Internally Set Speed (Pn304 to Pn307)
2 Reserved (Do not set.)
3 No. 1 Internally Set Speed to No. 8 Internally Set Speed (Pn304 to Pn311)
Pn301
Speed Command Direction Selection
Setting 
range
0 to 1 Unit – Default 
setting
0
Cycle the 
power supply
–
Set value Description
0 Use the sign of the speed command (+: Forward, –: Reverse)
1 Use Speed Command Sign Input (VSIGN) (OFF: Forward, ON: Reverse)
Speed Command 
Direction Selection 
(Pn301)
Internally set speed
Speed Command 
Sign Input (VSIGN)
Servomotor rotation 
direction
0 0 to 20,000 No effect Forward direction
–20,000 to 0 No effect Reverse direction
1 0 to 20,000 OFF Forward direction
–2,000 to 0
0 to 20,000 ON Reverse direction
–20,000 to 0
Speed
Speed