Dover OPW 88 Series - Civacon 8500;8800 Protocol; Message Format; Implemented Commands

Rack Monitor 88XX
Document: Operation Manual
Date: January 2024
Version: A.0 subject to change
Page 30 of 43 – Operations Manual
Civacon 8500/8800 Protocol
Message Format:
STX
A1A2*
Command_Text
ETX
LRC
Where:
STX = Start of Text = 02 Hex
A1A2 = Address = 01-99 Hex
Command Text = Character string including Command Code and associated parameters
ETX = End of Text = 03 Hex
LRC = Longitudinal Redundancy Check
An underscore _ (5Fh) is used as a command Text delimiter
The LRC is a 7 bit ASCII character computed as the Exclusive OR sum of all characters following the STX and
including the ETX characters.
Currently the following commands are defined
OS Overfill Status
VR Vehicle Recognition data
KD Bypass key Data
Currently the following commands are implemented
OS Overfill Status
VR Vehicle Recognition data
Command Code OS – Overfill Status
Request Command:
S
T
X
AA OS
E
T
X
LRC.
Reply Message:
S
T
X
AA OS_C1C2C3C4C5
E
T
X
LRC Where C1-C5 are defined in Tables 4~7.
Where X indicates an asserted condition.
Table 4
Character ‘C1’ Definition
Character
Hex
Sensor
Ground
Ground
Ground
Value
Permit
Verified
Loop
Bolt
0
30
5
35
X
X
6
36
X
X
8
38
X
>
3E
X
X
X
=
3D
X
X
X