OPERATION
OPERATING MODES
I-E96-211A
5 - 3
Reset Pushbutton
The Reset pushbutton is used to:
•
Reset the MFC to power up (default) status after a stop.
•
Recover from a user initiated stop or module timeout.
OPERATING MODES
The MFC has three modes of operation. They are: Execute,
Configure, and Error.
Execute Mode
The Execute Mode is the normal mode of operation. When the
MFC is in Execute mode, it computes algorithms, performs
functions, updates outputs, and communicates with the mod-
ule and slave expander busses. While in this mode, certain
user configured function block parameters can be tuned
(adjusted), but configurations cannot be modified. The status
LED is solid green indicating normal operation. However, in
certain nonfatal error conditions, the LED flashes green but
the MFC continues to operate.
Configure Mode
The Configure Mode is used to enter or modify the configura-
tion that makes up the user's control strategy. In this mode,
function blocks can be added, modified, or deleted by using
any of the standard INFI 90 operator interface devices (MCS,
OIS, etc.).
When the MFC is in the Configure Mode:
•
Slave outputs (analog) will hold their current values.
•
Slave outputs (digital) are de-energized or hold last value
(refer to the specific slave instructions for details).
•
Function algorithms are not computed.
•
The module responds only to CONFIGURE messages.
•
The Status LED blinks green.