Toshiba Tosvert RS485 - Manual (Page 39)

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• If the “Frequency point selection” function is disabled (=)
The operation frequency (frequency command value) of the inverters are calculated using the fol-
lowing equations, with the received data in the following equation used as the data received from
the master inverter when inverters are operated under the control of a master inverter (inter-drive
communication), or with the received data in the following equation used as the data received from
the computer when inverters are operated under the control of a computer (computer-linked opera-
tion).
10000
FH side Slave (%) data recieve Slave
) Hz ( fc
×
= (Hz)
Example: Unit:1=0.01Hz
Maximum frequency Operation frequency command value
Master (Fc) 100.00Hz (10000) 50.00Hz (5000)
Slave 1 90.00Hz (9000) 45.00Hz (4500)
Slave 2 80.00Hz (8000) 40.00Hz (4000)
%
FH side Master
fc side Master
(%) fc data send Master 50 5000
10000
10000 5000
= = =
Ч
=
Ч
：
10000
Hz ) Hz ( fc : Slave 45 4500
10000
9000 5000
1 = =
×
=
Hz ) Hz ( fc : Slave 40 4000
10000
800 5000
2 = =
×
=
0
• If the “Frequency point selection” function is enabled (≠)
When inverters are operated under the control of a mater inverter, the operation frequency (fre-
quency command value) of the slave inverters are calculated using the following equations.
When inverters are operated under the control of a computer, read “command from the master
inverter” in the following equations as “command from the computer.”
frequency int Po int Po (%) command Master
int Po int Po
frequency int Po frequency int Po
) Hz ( fc 1 1
1 2
1 2
）＋ （ − ×
−
−
=
(Hz)
Example: Units: Frequency unit 1 = 0.01Hz, Point setting unit 1 = 0.01%
Maximum
frequency
() Point 1
setting
() Point 1 fre-
quency
() Point 2 set-
ting
() Point 2
frequency
() Frequency
(Fc)
Master (Fc) 100.00Hz
(10000)
50.00Hz
(5000)
Slave 1 100.00Hz
(10000)
0.00%
(0)
0.00Hz
(0)
100.00%
(10000)
90.00Hz
(9000)
45.00Hz
(4500)
Slave 2 100.00Hz(1
0000)
0.00%
(0)
0.0Hz
(0)
100.00%(10
000)
80.00Hz
(8000)
40.00Hz
(4000)
Data sent by the master inverter
%
FH side Master
fc side Master
(%) fc : data send Master 50 5000
10000
10000 5000
= = =
Ч
=
Ч 10000
Both slaves 1 and 2: Result of a conversion made on the slave side
Hz
FH side Slave data receive Slave
) Hz ( fc 50 5000
10000
10000 5000
= =
Ч
=
Ч
=
10000
(%)
Both slaves 1 and 2: Result of a conversion to % made prior to a conversion to point frequency
%
FH side Slave
) Hz ( fc
(%) fc 50 5000
10000
10000 5000
= =
Ч
=
Ч
=
10000
Results of conversions to point frequency (for the equation used, see above.)
Hz ) ( ) Hz ( fc : Slave 45 4500 0 0 5000
0 10000
0 9000
1 = = − ×
−
−
= ＋
Hz ) ( ) Hz ( fc : Slave 40 4000 0 0 5000
0 10000
0 8000
2 = = − Ч
−
−
= ＋