Radionics D6500 - Page 15

D6500 Computer Interface Manual
74-05313-000-G 10/16/97 Page 11 © 1988-1997 Radionics, Inc.
LF
Standard line feed character.
Header
The header of an SIA format message consists of:
checksum
This 6 byte ASCII HEX field is the cyclical redundancy check (CRC) number.
tab
09 hex
sequence#
This 4 digit field is the message sequence number. The valid sequence number range
is: 0001 - 9999.
receiver#
This 2 byte ASCII HEX field is the number of the receiver that sent the message.
Valid digits are: 00-99 (D6500), as programmed in D6500:MPU
Receiver Number
.
line card#
This 2 byte ASCII HEX field is the line number of the line card in the receiver that sent
the message. Valid digits are: 0-8. The D6500 uses linecard #0 for receiver
messages.
Account #
This 4 byte ASCII HEX field is the communicator's account number.
Data
This field contains message data codes, such as event type, area number, point number, identification
number, etc. Information in the data field is presented as shown in the examples below. Each event has
a unique event code. Point number, relay number, and time information is included if applicable to the
event. SIA Mode labels - literal ASCII letters that are output to the automation system - are indicated in
bold
in the Data field.
account
number
"New"
label
area#
label
area#
id#
label
event
code
point#
account
number
"New"
label
area#
label
area# event
code
point#id#
[#7112| lFA100]Nri
[#0045| 3/ 001HA048]
Nri id
Example 1:
Example 2:
The D6500 SIA mode output conforms to the standards specified in the SIA
Digital Communication Standard
(September 1990)
and
Computer Interface Standard (June 1990)
with the following exceptions:
• The "*" block identifier code is not supported. Messages handled in D6500 manual mode are not
transmitted to the automation system.
• The SIA Computer Interface Standard calls for an "R" (Rejecting Data) block identifier code message from
the receiver to indicate that it can not accept a command from the automation system. The receiver sends
the "R" (Rejecting Data) block identifier code message to the automation system's computer.
The D6500 uses the "R" (Rejecting Data) block identifier code message in response to any commands
from the automation system, including the "H" and "D" block identifier codes and when control,
programming or ASCII data is sent to the receiver as part of a response to a message from the receiver to
the computer (p. 17, CIS 6/90)