Lake Shore Model 218 Temperature Monitor User’s Manual
Remote Operation
6-1
CHAPTER 6
REMOTE OPERATION
6.0 GENERAL
This chapter provides operational instructions for the computer interface for the Lake Shore Model 218
Temperature Monitor. Either of the two computer interfaces provided with the Model 218 permit remote
operation. The first is the IEEE-488 Interface described in Paragraph 6.1. The second is the Serial
Interface described in Paragraph 6.2. The two interfaces share a common set of commands detailed in
Paragraph 6.3. Only one of the interfaces can be used at a time.
6.1 IEEE-488
INTERFACE
The IEEE-488 Interface is an instrumentation bus with hardware and programming standards that
simplify instrument interfacing. The Model 218 IEEE-488 Interface complies with the IEEE-488.2-1987
standard and incorporates its functional, electrical, and mechanical specifications unless otherwise
specified in this manual.
All instruments on the interface bus perform one or more of the interface functions of 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 Model 218 performs the functions of TALKER
and LISTENER but cannot be a BUS CONTROLLER. The BUS CONTROLLER is the digital computer
which tells the Model 218 which functions to perform.
Below are Model 218 IEEE-488 interface capabilities:
•
SH1:
Source
handshake
capability.
•
RL1:
Complete
remote/local
capability.
•
DC1:
Full device clear 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.
•
SR1:
Service request capability.
•
AH1:
Acceptor
handshake capability.
•
PP0:
No parallel poll capability.
•
E1:
Open collector electronics.
