Fisher FIELDVUEDVC6200f Instruction Manual page 245

Instruction Manual
D103412X012
Output Limit Scaling
During download OUT_HI_LIM and OUT_LO_LIM are set to their configured values. If you have not changed these
values from their defaults they are set as follows during the first execution of the block:
D OUT_HI_LIM is set to OUT_SCALE(EU100)
D OUT_LO_LIM is set to OUT_SCALE(EU0)
During runtime the limits are restricted as follows:
D OUT_HI_LIM is restricted to OUT_SCALE(EU100) + 0.1 × (OUT_SCALE(EU100) - OUT_SCALE(EU0)).
D OUT_LO_LIM is restricted to OUT_SCALE(EU0) - 0.1 × (OUT_SCALE(EU100) - OUT_SCALE(EU0)).
The OUT parameter is not changed as a result of changing the scale or limits. However, if OUT violates the new limits
OUT is forced within the limits on the next execution of the block.
Output Selection and Limiting
You can limit the output by configuring the OUT_HI_LIM and OUT_LO_LIM parameters.
Modes
The Control Selector function block supports four modes:
D Out of Service (OOS)
D Initializing Manual (IMan)
D Manual (Man)
D Automatic (Auto)
Status Handling
The statuses of OUT, BKCAL_SEL_1, BKCAL_SEL_2 and BKCAL_SEL_3 are mode dependent.
Manual mode
The status of OUT is set to Good: Cascade, Constant. The status of BKCAL_SEL_1, BKCAL_SEL_2 and BKCAL_SEL_3 are
set to Good: Cascade, Not Invited (NI). The value of BKCAL_SEL_1, BKCAL_SEL_2 and BKCAL_SEL_3 are set to the value
of OUT.
DVC6200f Digital Valve Controller
CSEL Function Block
February 2017
245