Lakeshore Learning Materials 647 - Manual (Page 31)

Lake Shore Model 647 Magnet Power Supply User’s Manual
Remote Operation 4-1
CHAPTER 4
REMOTE OPERATION
4.0. GENERAL
Either of two computer interfaces available for the Model 647 permit remote MPS operation: the IEEE-488
Interface (Paragraph 4.1) and the Serial Interface (Paragraph 4.2). Use only one of the interfaces at a time.
The two interfaces share a common set of commands described in Paragraph 4.3. For further information on
RS-485 Mainframe Control Bus Operation, see Appendix C.
4.1. IEEE-488 INTERFACE
The IEEE-488 Interface is an instrumentation bus with hardware and programming standards that simplify
instrument interfacing. The MPS IEEE-488 Interface complies with the IEEE-488.2-1987 standard and
incorporates the functional, electrical, and mechanical specifications of the standard unless otherwise
specified in this manual.
All instruments on the interface bus perform one or more interface function: TALKER, LISTENER, or BUS
CONTROLLER. A TALKER transmits data onto the bus to other devices. A LISTENER receives data from other
devices through the bus. The BUS CONTROLLER designates to the devices on the bus which function to
perform. The MPS performs the functions of TALKER and LISTENER but cannot be a BUS CONTROLLER.
The BUS CONTROLLER is the digital computer which tells the MPS which functions to perform.
Below are MPS IEEE-488 interface capabilities:
• SH1: Source handshake capability • SR1: Service request capability
• RL1: Complete remote/local capability • AH1: Acceptor handshake capability
• DC1: Full device clear capability • PP0: No parallel poll capability
• DT0: No device trigger capability
• C0: No system controller capability
• T5: Basic TALKER, serial poll capability, talk only, unaddressed to talk if addressed to listen
• L4: Basic LISTENER, unaddressed to listen if addressed to talk
4.1.1 Interface Settings
To use the IEEE-488 interface, the user must set the
IEEE Address and Terminators. Press Function
Menu, then press the key corresponding to SETUP to
display the Setup screen. Use the cursor keys to
move the arrow indicator to IEEE/SIO, then press
either of the Up or down Numeric Entry keys to display
the IEEE Interface screen.
IEEE ADD: 1 to 30
Use the cursor keys to move arrow indicator to IEEE
ADD. The Up or down Numeric Entry keys increment
or decrement the IEEE Address. The default value is
12. The range of choices is from 1 to 30.
TERMS: CR LF, LF CR, LF, DAB
Use the cursor keys to move the arrow indicator to TERM. The Up or down Numeric Entry keys cycle through
the following choices: (CR LF), (LF CR), (LF), (DAB). The default is Carriage Return and Line Feed (CR LF).
EOI: ON or OFF
Use the cursor keys to move the arrow indicator to EOI. The Up or down Numeric Entry keys toggle EOI On
or Off. The default is On. If turned on, End Or Identify is asserted during the last byte of a multibyte transfer.
BAUD: 300, 1200, 9600
Use the cursor keys to move the arrow indicator to BAUD. The Up or down Numeric Entry keys cycle through
the following baud rates for the RS-232 interface: 300, 1200, 9600.
S E T U P :
¤ IE E E / S O I
C B D E F
C B A D D
V W A N G L E
M F ID
IM A X S E T
V M A X S E T
O U T P U T :
:
: 9 6 0 0 ,o ,7 ,1
: 0
: 5
: 6 4 7 (1)
: + 7 2 .0 0 A
: + 3 2 .0 0 V
¥
¥
¥
*
- 0 .0 0 A
+ 0 .0 0 V
L O C
IE E E IN T E R F A C E :
¤ IE E E A D D
T E R M S
E O I
R S - 2 3 2 IN T E R F A C E :
B A U D
D E F
O U T P U T :
: 12
: (C R )(L F )
: <O N >
: 9 6 0 0
: 0 ,7 ,1
¥
¥
¥
¥ *
- 0 .0 0 A
+ 0 .0 0 V
L O C