
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 62
Coastal Environmental Systems’ PC application, Intercept™ uses the
CCSAIL Communications Protocol to communicate with one or more
remote ZENO
®
-3200s.
The CCSAIL Communications Protocol provides a set of specific commands that can retrieve Data
Records, change internal ZENO
®
-3200 settings and even change an existing ZENO
®
-3200 configuration.
4.6.1. The Structure of a CCSAIL Framed Message
All CCSAIL messages utilize the following frame structure:
The minimum possible size for a CCSAIL message is 13 characters, but it is usually longer because the
"message" portion normally contains more than 1 character.
The following table explains the different fields of a CCSAIL message:
Start of
Field
Number of
Characters
Field Designation Purpose
1
ST
1
Attention Character
(ATN)
Indicates beginning of CCSAIL message.
(Always a # sign.)
2
ND
4
Destination Address
(DST)
Identifies intended recipient of the message.
Valid values are 0000 to 9999.
6
TH
4
Source (Return)
Address (RTN)
Identifies who sent the message. Valid values
are 0000 to 9999.
10
TH
At least 1 Command (CMD)
Action to be carried out by recipient of
message or contents of one or more Data
Records.
3
RD
to
Last
2 Checksum (CHK)
Error checking for message validation. Valid
values are 00 to 99.
Last 1
End of Transmission
(ETX) Character
Indicates end of CCSAIL message. (Always an
<ETX>, or ASCII 3. Keyboard would be Ctrl-
C.)
CCSAIL Frame Structure
# D D S Message C <EXT> D D S S S C
End of
Transmission
Characte
Checksum
Source
Address
Destination
Address
Attention
Character
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