Toshiba Tosvert VF-S15 Instruction Manual page 233

2) Multiplicative override
In this mode, each output frequency is multiplied by an externally override frequency.
[Ex.1: VIA (Reference frequency), VIC (Override input)] [Ex.2: VIB (Reference frequency), VIA (Override input)]
Output
Over-ridden frequency
frequency

0
Ex.1:
f660 = 0 (Disabled), f661 = 3 (VIC input), fmod = 1 (VIA input), fh = 8=0 , ul = 8=0
VIA input, ( f201 = 0 , f202 = =0 , f203 = 100 , f204 = 8=0 )
VIC input ( f216 = 0 , f220 = 0 , f218 = 100 , f221 = 100 )
 Setting of VIA input: Refer to Section 7.3.1, Setting of VIC input: Refer to Section 7.3.2.
Output frequency = Reference frequency × {1 + Override (VIC input [%]/100)}
Ex.2:
f660 = 0 (Disabled), f661 = 1 (VIA input), fmod = 2 (VIB input), fh = 8=0 , ul = 8=0
VIB input ( f210 = 0 , f211 = =0 , f212 = 100 , f213 = 8=0 )
VIA input ( f201 = 0 , f205 = 0 , f203 = 100 , f206 = 100 )
 Setting of VIB input: Refer to Section 7.3.3, Setting of VIA input: Refer to Section 7.3.1.
Output frequency = Reference frequency × {1 + Override (VIA input [%]/100)}
Ex.3:
Title
f729  Operation panel override multiplication gain
Output frequency = Reference frequency × {1 + Override (f729 setting value [%]/100}
( )
-10V
VIA input
(Reference
frequency)
10V
Function
F-121
Output
frequency
Over-ridden frequency

Forward run
0

Adjustment range
- 100 - + 100 %
E6582175
( )
VIB input
(Reference
frequency)
10V
Reverse run
Default setting
0 
6