7.1
95-8533
4-6
Lon Comm
Redundant controllers exchange information across
the LON network. This is primarily done to prevent
both controllers from becoming the master in the
event that the HSSL fails. The fault is annunciated
when a controller fails to receive any information from
the other controller.
Msg Error
If the standby controller receives a message from the
master that has the correct CRC but invalid data an
error message is returned. This master will indicate
the error with this fault.
Program Flow
Program flow checking ensures that essential
functions execute in the correct sequence. If any
functions don’t execute properly, or execute in the
wrong order, the program flow error is set and control
is transferred to the standby controller.
LON A/B Inf
Controllers utilize neuron co-processors to interface
with the field device network. If an error is detected in
the operation of the co-processor, a LON interface
fault is annunciated.
User Logic CS
Controllers continually conduct a checksum test of the
user logic program to ensure that the data remains
unchanged. A user checksum fault is annunciated if
the result is incorrect.
App CS
When the controller firmware is generated a checksum
of the program is calculated and saved in memory.
Each controller is continually conducting a checksum
test of the program to ensure that the data remains
unchanged. The application checksum fault is
annunciated if the result is incorrect.
User Logic
Many checks are conducted while the controller
interprets and executes the user program. The user
logic error is generated if invalid or out of range data
is detected.
Config
This fault is annunciated when a controller has not
been configured or the configuration information has
been corrupted.
Power 1
Displays the power 1 status on the standby controller.
Power 2
Displays the power 2 status on the standby controller.
Option Bd
Indicates whether there is a fault on the ControlNet
option board of the standby controller.
CONTROLLER AUDIBLE ALARM
The Controller features an internal audible alarm for
local system status notification (see Table 4-2 and
Figure 4-4). When the system is operating in the
normal mode (no Alarm or Fault conditions occurring),
the alarm is silent (off). If an event (any alarm or
trouble condition) occurs, the alarm will remain active
until it is acknowledged by pressing the Acknowledge
pushbutton or reset by pressing the Reset pushbutton
on the Controller front panel.
Table 4-2—EQP Controller Alarm Tone Patterns
Priority
Controller Tone
Tone Pattern
1
Fire Alarm
Temporal
2
Supervisory
Supervisory
3
Trouble
Trouble
4
High Gas
Gas
5
Low Gas
Gas
6
Normal
Off
Summary of Contents for DET-TRONICS 95-8533
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