
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 63
The Destination and Source Addresses must each be four characters in length. The range of valid values
for each character is 0 through 9. (This is the same as the ASCII characters ranging from 48 to 58.)
Therefore, the four-character range of each address is 0000 to 9999.
9999 is the universal CCSAIL address.
When the intended recipient of a CCSAIL message is a ZENO
®
-3200, the
Destination Address must match the Primary Unit ID defined in the System
Functions Menu (refer to Section 5.5), or the Destination Address can be
9999.
Any ZENO
®
-3200 will respond to a valid CCSAIL message whose
Destination Address is 9999.
Using a Destination Address of 9999 is NOT recommended when more than
one ZENO
®
-3200 is on the same communications link.
When a ZENO
®
-3200 is sending a CCSAIL message to another device, the Source Address of the
CCSAIL message becomes the Primary Unit ID defined in the System Functions Menu.
58
Normally, when the intended recipient of a CCSAIL message is a ZENO
®
-3200, the "message" portion of
a CCSAIL message will be the command for the ZENO
®
-3200 to perform. When a ZENO
®
-3200 sends a
CCSAIL message, the "message" portion of the CCSAIL message is usually one or more Data Records,
but it can also be some other type of requested information or even just an acknowledgement.
59
The Checksum is calculated by adding the decimal ASCII values of all characters contained in the
Destination Address, Source Address and "message" fields. Only the two least significant decimal values
of the Checksum are incorporated into the CCSAIL message and are often referred to as the modulo-100
checksum.
4.6.2. The ZENO
®
-3200's Response to a CCSAIL Message
A ZENO
®
-3200 can receive a CCSAIL message only when the User Interface
is NOT active. If you are communicating with the ZENO
®
-3200 through the
User Interface Menus, no CCSAIL message will be interpreted by the
ZENO
®
-3200.
58
Refer to Section 5.5.
59
Refer to Section 10.6.7 for Coastal Environmental System's recommended procedures for configuring output
messages in CCSAIL format.
Kommentare zu diesen Handbüchern