TM
Page 35
Reference manual Foundation Fieldbus Control module
DOC.RM.QC34.E Rev: A
October, 2006
5 Operations and Maintenance
5.3.1 Software restart
There are several Restart options as described
bellow. This can be done via parameter RESTART
(index 16) in the Resource block. The following is a
brief description for each of the restart options:
y Resource - Performing a “Resource”-restart has
no observable effect on the module resetting the
dynamic variables in the Function Blocks. How-
ever, the dynamic variable within the module are
reset and this could cause a “bump” in your
process.
y Processor - Performing a “Restart Processor” has
the same effect as removing power from the
module and re-applying power. This is typically
used to restart the Foundation Fieldbus Interface
card should the Interface Card and the Module I/O
card get out of sync due to incorrect power appli-
cation.
y Defaults - Performing a “Restart with Defaults”
should be done with care. This restart sets the
static parameters of the function blocks in the
module to their default state. It also disconnects all
links within the module. After performing a “Restart
with Defaults”, a “Restart Processor” should be
performed. Within the FieldQ Series of modules,
the “Restart with Defaults” option is the only option
that will read certain data from the FieldQ Commu-
nications board.
y Actuator Processor - Performing a “Actuator
Processor”-Restart has the same effect as remov-
ing power from the control part of the module and
re-applying power. This is typically used to restart
the control part of the module.
y Actuator Defaults - Performing a "Actuator
Defaults”-restart should be done with care. This
restart sets the switch point to default (see §3.2).
5.1 Fault state
The fault state parameter, when active, indicates a
loss of communication to an output block, a fault
promoted to an output block, or loss of a physical
contact. If the fault state is active, the output function
blocks perform their Fault State actions. Selecting
the feature Fault State enables the ability to manu-
ally set and clear the fault state of the device. Setting
the Set Fault State parameter to “Set” manually
places the instrument in the fault state. Setting the
Clear Fault State parameter to “Clear” clears the
device fault state if no faults are currently active. You
can test the actions the output blocks will perform by
manually setting the fault state active.
5.2 Restart method
The following method is provided with the FieldQ
Module Device Description:
y Restart
Method Description:
y Master Reset - Available via the Resource Block,
the Master Reset method is required for restarting
the switchbox without removing power. It also
allows the user to set data within the switchbox to
its default state. In addition to restarting the
switchbox, this method also performs switchbox
integrity tests to verify that it is acceptable to
restart the switchbox. This method is only available
via the Resource Block and is described in detail in
the detailed setup section (section 4.1).
5.3 Restarting the module
You can restart the module via different mechanisms.
Depending on which restart option is used; the
communication links, static parameters, etc. may be
affected. However, due to the effect that a restart can
have on the module, and therefore the process,
restarting the module should be used cautiously.
WARNING
Restarting the FieldQ may cause
loss of control of the process.
