KEPCO MST 488 Programmer - Manual (Page 29)

MST488-27 013004
3-3
3.3 RS 232 OPERATION
The MST 488-27 controller may be operated via an RS 232-C terminal, or from a PC using a ter-
minal emulation program. The default settings are as follows:
• Baud rate: 9600 (no jumper between RTS and CTS on RS 232 port)
• Parity: None
• Data Bits 8
• Stop Bits 1
• Echo ON
• XON OFF
When a jumper on the RS 232 port (RTS, CTS) is present, the GPIB address switch settings
determine XON, echo, and baud rate as follows:
• Bit 5, 4 - baud rate (00 = 9600,11 = 19200, 10 = 4800, 01 = 2400)
• Bit 3 - Echo (1 = enable; 0 = disable)
• Bit 2 - XON (1 = disable; 0 = enable)
• Bit 1 - Not used for RS 232 configuration; only affects GPIB Address (see PAR.3.3.1).
NOTE: The RTS to CTS jumper must be installed externally, on the cable.
Upon power-up, the RS 232 port provides the following message (typical):
KEPCO POWER SUPPLY CONTROLLER V.4.6;PSC=6;PROGMODE=2
where
V4.6
indicates the software Version number
PSC=6
indicates the first device is a Power Supply Controller with the GPIB address set to 6
PROGMODE=x
is defined as follows:
x = 0 = CIIL
x = 1 = SCPI (secondary addressing enabled)
x = 2 = SCPI (standard)
x = 3 = SCPI (compability mode enabled)
3.3.1 RS 232 WITH GPIB ADDRESSING
See PAR. 2.2.1.
3.3.2 SERIAL INTERFACE
The serial interface behaves like the GPIB interface in that the command is parsed after receiv-
ing a control character of either a Line Feed or Carriage Return. The serial interface supports six
special control characters. The six special control characters are:
Escape (1B
H
) Causes the input buffer to be cleared. This character is used to ensure
that the buffer is empty when the host powers on since it is possible
that the MST was previously powered on and received some charac-
ters prior to the initialization of the host computer.