CI Systems SR-800R
6. SR-800R Communication Protocol
This chapter defines the communications protocol between the ControlMaster
Blackbody and the HOST.
The digital link may be based on an Ethernet, GPIB or an Asynchronous Serial
hardware configuration.
Data is transmitted by using ASCII Text characters except where noted for downward
compatibility between the ControlMaster and CI's SR80 Blackbody Controllers.
YOU MUST
wait for the system to power-up (e.g., Main window opens, prior to
attempting to communicate with the ControlMaster).
Note that when working via the Remote Control program, error messages could
appear on the window.
6.1 Requirements
6.1.1 Electrical Interface
(See Section 3.2.3.6.2: Settings)
RS232 Serial Communications Port: Asynchronous, serial, RS232 @ 9600 BAUD
Ethernet Port: 10 BaseT
GPIB (IEEE-488)
6.1.2 Communication Sequence & Timing
The Host, i.e., the computer, initiates communication with the ControlMaster by
transmitting a message. Each message contains command bytes and an end of
message byte.
The space between successive transferred bytes shall not exceed 0.1 mSec.
There shall be a minimum of 300 mSec between message transmissions, unless
noted otherwise.
The ControlMaster responds to messages at maximum rate of 3 messages per
second, unless otherwise specified.
605-7040 Operation Manual
Rev D 6-1
June 2013
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