Instruction Manual
748441-D
April 2002
4-6 Serial Interface Option
Rosemount Analytical Inc. A Division of Emerson Process Management
Model CAT100
b. Numerical
Representations
Strings may contain integers or real num-
bers. The formats for these numbers are
subject to the following restrictions:
Integers
Maximum value = 2
16
– 1
Only positive numbers are accepted
No decimal points allowed
Real
Maximum of 6 digits accepted
No alphabetic characters allowed
Analyzer output are 6-digit real
numbers
c.
Block Parity Check
The host computer may insert a mes-
sage-length parity byte into the strings.
These must be two characters.
The message-length parity byte is the
cumulative exclusive-or correlation of all
previously transmitted characters of the
string line. Representation is in hexa-
decimal format. For example, if the deci-
mal value should be 13, the message-
length parity byte will be represented by
the two characters “OD,” o30H and o44H.
The block parity check may be enabled or
disabled at the analyzer (see Section 4).
