Chapter 7 Servo Parameters|ASDA-A&A+ Series 
Revision April 2009    7-93 
Sign 
Setting 
Value 
Digital Input Function Description 
STEPD 40 
Step down input. When STEPD is activated, 
the motor will run to previous position. 
STEPB 41 
Step back input. When STEPB is activated, 
the motor will return to first position. 
AUTOR 42 
Auto run input. When AUTOR is activated, 
the motor will run automatically according to 
internal position command. For interval time 
setting (Timer 0 ~ 7), please see parameter 
P2-52 to P2-59. If the timer is not set, the 
internal position command without setting 
timer will be passed over and not executed. 
The motor will run according to the next 
internal position command. 
Available when the drive is in Pr mode 
and users must set P1-33 to 5 and 6. 
(Internal auto running mode) [see section 
12-7 Internal Auto Running Mode] 
GNUM0  43  Electronic gear ratio (Numerator) selection 0 [see P2-60 ~ P2-62] 
GNUM1 44 
Electronic gear ratio (Numerator) selection 1 [see P2-60 ~ P2-62] 
Pulse
Denominator (P1-45)
Smooth Filter
(P1-08)
1st Numerator (N1) (P1-44)
2nd Numerator (N2) (P2-60)
3rd Numerator (N3) (P2-61)
4th Numerator (N4) (P2-62)
Pulse
Error
Feed Back Pulse
GNUM0, GNUM1
 
INHP 45 
Pulse inhibit input. When the drive is in position mode, if INHP is activated, the 
external pulse input command is not valid. 
STF 46 
Enable motor forward operation. In speed mode, it is used to enable the motor forward 
operation. 
STB 47 
Enable motor reverse operation. In speed mode, it is used to enable the motor reverse 
operation. 
STF STB  Explanation 
1  0  Forward operation of speed command (CCWL) 
1 1 Stop 
0 0 Stop 
0  1  Reverse operation of speed command (CWL) 
0: indicates OFF (Normally Open); 1: indicates ON (Normally Closed) 
Please note that never use DI STF and STB with DI SPD0 and SPD1 simultaneously.
 
NOTE
 
1)  11~17: Single control mode, 18~20: Dual control mode 
2)  When P2-10 to P2-17 is set to 0, it indicates input function is disabled. 
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales