Remote Operation; Introduction; Set Gpib Address And Rs-232 Parameters; Rs-232 Pin Definition - Delta A1500 Series User Manual

User Manual
A1500
AC Power Source

4. Remote operation

4.1 Introduction

A1500 SERIES can be remotely controlled by GPIB or RS-232. GPIB interface is an 8-bit
parallel data bus with other control lines to manage communication. RS-232 transmits data
in series so communication speed is slower.
If transmission speed is faster than data processing speed of micro-processor, micro-
processor will neglect new received command when there is command under processing.

4.1.1 Set GPIB address and RS-232 Parameters

GPIB and RS-232 parameters can be set at CONFIG page. Default address of GPIB is 30,
baud rate of RS232 is 9600, and Even/odd parity check of RS232 is NONE.
4.1.2 RS-232 pin definition
RS-232 interface uses RXD and TXD signals only. RS-232 implements 9PIN D-SUB type
female connector, pin definition is listed as below.
Pin
1
2
3
4
5
6
7
8
9

4.1.3 GPIB Interface

GPIB function
Sender/
receiver
Service request
Remote/local
control
56 │ www.deltaww.com
Input/Output
NC
OUTPUT
INPUT
NC
GND
NC
NC
NC
NC
Explanation
GPIB bus may transmit or receive
data by this function. Use following
commands to read information.
AC source will pull SRQ pin to low
voltage when interfaced instruments
have service request.
AC source can be controlled by front
panel locally or GPIB remotely.
Press Unlock key to switch from remote
control back to local control, other keys
are inactive during remote control.
Definition
NC
TXD
RXD
NC
GND
NC
NC
NC
NC
Interface function
AH1，SH1，T6，L4
SR1
RL1