ASTRO VG-871 - Chapter 1 CONCERNING the TERMINAL COMMANDS; Introduction; Communication Specifications; Rs-232 C

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CONCERNING THE TERMINAL
COMMANDS
1.1 Introduction
The terminal mode is provided for controlling the VG generator from an external computer (such as
a personal computer). The commands and data are transmitted and received through the
RS-232C serial input/output port or through the LAN port.
By using the terminal mode, it is possible to register program data, execute programs, turn
patterns ON or OFF and perform other operations which are virtually identical to their
corresponding manual operations. In addition, functions for writing straight lines, circles, dots, etc.
are supported with graphic commands.
As in the past, the commands and data are transmitted and received through the RS-232C serial
input/output port or through the LAN port.
Although a different communication format is now used, the communication specifications,
connection configuration, error statuses and other specifications remain virtually unchanged from
before.
This manual describes the terminal commands which are supported by the VG-870, VG-871,
VG-873, VG-874, VG-880, VG-881 VG-882 and VG-883 generators.
Also the terminal commands of the VG-848 series (hereafter indicated as the “old VG models”) are
described.
1.2 Communication specifications
1.2.1 RS-232C
 Communication parameters
Communication system
Asynchronous system
Interface
RS-232C
Baud rate
9600/19200/38400/57600/115200 bps
Note) 115200 bps rate is not supported by VG-870 or VG-871.
Data length
8 bits, fixed
Stop bits
1 or 2
Parity
None, even or odd
Flow control
None
Fig. 1-2-1
 Connectors
Computer end
VG-870 end
Pin No.
Signal
Pin No.
Signal
2
RXD (Received data)
2
TXD (Transmitted data)
3
TXD (Transmitted data)
3
RXD (Received data)
5
GND (Signal ground)
5
GND (Signal ground)
7
RTS (Request to send)
7
CTS (Clear to send)
8
CTS (Clear to send)
8
RTS (Request to send)
Fig. 1-2-2