GE FVP110 Maintenance Manual page 126

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The following are outlines of each mode:
O/S mode
IMan mode
LO mode
Man mode
Auto mode
Cas mode
ROut mode
Out of Service mode, in which the block does not run, and its out-
put and setpoint maintain their previous values.
Initialization Manual mode. Only the AO and PID blocks in the
FVP110 support this mode. When one of these blocks detects a
loss of a correct path to the downstream block (such as when the
downstream block is in the O/S, Man, Auto or LO mode), it enters
IMan mode. For example, when the data status of BKCAL_IN in a
PID block is bad or good: not invited, the PID block enters IMan
mode.
Local Override mode. If the PID block enters LO mode, the block
output follows the tracking value (TRK_VAL). In AO block, the
block enters LO mode when the block detects the fault status. In
this case, the block holds the output or outputs the pre-configured
value (FSTATE_VALUE) according to the setting of options.
Manual mode. If the data status of a function block's input is bad
or its target mode is Man, the block enters Man mode. In Man
mode, the function block does not update its OUT value. If the tar-
get is also Man, it allows you to write a desired value to it.
In Auto mode, the function block performs the specified calcula-
tions based on the setpoint and outputs the result, independently
without interlocking with another function block. You can write the
setpoint of a function block in this mode if the target is Auto. If the
target mode of a function block is Auto, or if both of the following
conditions are met for a function bock, the block enters Auto
mode:
The target mode is Cas or RCas.
There is an error in communication with the upstream
function block.
Cascade mode. In Cas mode, the function block performs the
specified calculations based on the setpoint input from a different
function block via the cascade input parameter and outputs the
result.
Remote Output mode. In ROut mode, the output of the function
block is set to the value of the remote output parameter that is
written by a host computer or others. To prevent a sudden change
in output, the block's calculations are initialized when a change in
mode occurs.
110
FVP 110 Fieldbus Valve Positioner Manual

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