Operating Instructions
Model 200E Instruction Manual
Step three in the configuration process is to restart the pass-through mode for normal
operation.
SETUP X.X
PRIMARY SETUP MENU
CFG DAS
RNGE
PASS CLK
MORE
EXIT
SETUP X.X
SECONDARY SETUP MENU
COMM
VARS DIAG
EXIT
SAMPLE RANGE = 500.0 PPB O3 =XXX.X
< TST TST > CAL
SETUP
ETHERNET STARTED
SETUP X.X
COMMUNICATIONS MENU
ID
INET
COM1
COM2
EXIT
INTERNET CONFIGURATION
GTWY IP SNET PORT
STRT
STOP
EXIT
STARTING ETHERNET
If the message
ETHERNET NOT STARTED
appears here, the Ethernet card either was already
in configuration mode or might not be responding.
6.9.10. Hessen Mode Configuration
The Hessen protocol is used in applications, which adhere to operation protocols originally
defined by the German state of Hessen and also applies to the Bavarian protocol.
A Hessen protocol network typically consists of a host computer that monitors the status
and controls one or more remote instruments. The remote instruments are regarded as
slaves of the host computer, and only respond to commands from the host computer;
remote instruments never initiate Hessen protocol messages.
The Hessen protocol is a multidrop application, in which several instruments are connected
to a common communications channel (e.g., using hardware Option 62). However, the
implementation details of this multidrop bus are handled outside of the instrument. The
instruments are unaware that they are connected to a multidrop bus and respond only to
commands containing their own unique ID number.
The Hessen protocol is designed to accomplish two things:
•
to obtain the status of remote instruments, including the concentrations of all the
gases measured and
•
to place remote instruments into zero or span calibration or measure mode.
The T-API implementation supports both of these principal features.
From the user’s point of view, the RS-232 hardware on T-API instruments supporting the
Hessen protocol is not different from that of standard instruments. The RS-232
communication parameters, however, are different from standard configurations. For more
information on configuring the Hessen protocol, please download the manual addendum at
http://www.teledyne-api.com/manuals/.
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