Instruction Manual
748441-D
April 2002
Rosemount Analytical Inc. A Division of Emerson Process Management
Serial Interface Option 4-3
Model CAT100
4-3 SETTING INTERFACE PARAMETERS
a. ON/OFF
Status
The analyzer may be set to either “on-
line” or “off-line” status. This setting may
be performed either from the touch pad or
by string instruction.
Settings
Status
Touch pad
String
On-Line
Status
On.-L = 1
Code 6
Off-Line
Status
On.-L = 0
Code 7
NOTE
If the analyzer is set to “off-line”
status, it will accept only instruction
code 6 from the host computer. All
other instructions will be ignored and
result in the transmission of the ap-
propriate status strings.
b. Communication
Parameters
The communication parameters between
the analyzer and the host computer must
agree for error-free communications. The
following analyzer parameters can be set:
Baud rate:
600 / 1200 / 2400 / 4800
Data bits:
8
Stop bits:
2
Parity bit:
none
Echo mode: on / off (received charac-
ters will be retransmitted
immediately)
LPB-test:
on / off (message length
parity check)
ID-number: 0 to 99 (device ID-number
in RS485 mode)
All entries are made us the INPUT-
CONTROL pads and the ENTER pad.
Activate the FUNCTION pad until:
appears. Then activate ENTER.
If the Password Code has not already
been entered, the following will appear:
Use the INPUT-CONTROL pads to select
the proper Password Code and then acti-
vate the ENTER pad.
The analyzer is now ready for code entry
by entering the following parameters and
activating ENTER between each entry:
0 = off-line status
1 = on-line status
For RS485 opera-
tion only, each de-
vice is assigned a
device number of 0-
99.
Select interface
type:
0 = RS485
1 = RS232C
Set baud rate:
0 = 4800
1 = 2400
2 = 1200
3 = 600
Echo-mode opera-
tion:
0 = OFF
1 = ON
Message-block par-
ity check:
0 = OFF
1 = ON
