Toshiba SX 2000 - Manual (Page 65)

Chapt.1 System Configuration
1.4.10 Sampleprograms
A. Variable speed drive (Toshiba’s VF-S7) control
A sample program for the S2T to control the variable speed drive, VF-S7, is shown
here.
For details of the serial communication function of the VF-S7, read the separate
manual “VF-S7 Serial Communication Function”.
(1) Link port setting
a) Mode setting of the Link port (S2T):
Select the free ASCII mode by setting the SW069 to "2"
b) Communication parameter setting:
Set the S2T’s communication parameters (baudrate, data bit length, parity and
stop bit length) to be matched the VF-S7’s setting.
The VF-S7’s setting at factory shipment is as follows.
Baudrate: 9600 bps (changeable)
Data bits:
8 bits (fixed)
Parity: Odd (changeable)
The S2T’s stop bit length should be set to 1 bit.
c) Communication time-out setting of VF-S7:
To let trip the VF-S7 at the case of communication error, enable the time-out
function of the VF-S7. To do this, set the monitor time on the VF-S7’s
parameter F803.
In this sample program, the VF-S7’s operation (start and stop) is controlled
through the serial communication. Flowever, for actual application, it is
recommended to use the terminal inputs for the signals F (forward) and R
(reverse) even if the frequency is controlled through the serial communication.
(2) Communication commands used in this sample program
In this sample program, the following commands (function numbers) are used.
The VF-S7’s station number is assumed as 01.
FE01 Operation status (read)
FAOO Control command (write) - forward / reverse / stop / reset
FA01 Operation frequency (write)
48 Sequence Controller S2T