CONFIGURATION
D.O. LOCK
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Reverse Acting Final Control Elements
When a reverse acting final control element (air-to-close (ATC)) is in
use, the control output of the Type SLC controller must be inverted.
Two operating modes will be affected: bypass mode and execute
mode. In bypass mode, the operator interface board controls each
analog output in the manner described in
To make the selection, use the
SETUP-LOOP#-BYPASS DIRECTION
menu. In execute mode, the main board (with the configuration) exe-
cutes function codes and controls the outputs. Each ATC final control
element (reverse acting output) must be configured to add a two-input
summer (function code 15) between the M/A station output (function
code 80) and the corresponding analog output of function code 230
(strategic loop controller I/O, fixed block address 100). Refer to
Figure
Entering Data
Entering data into the controller requires the Type CTT Configuration
and Tuning Terminal. Refer to the handheld terminal instruction for
detailed procedures on entering the information.
1. Enter the Type SLC controller module address.
2. Place the controller in bypass.
3. Place the target unit in the configure mode.
4. Determine the block address at which to place the function code.
5. Add the block.
6. Select required function code.
7. Set the specifications to the required values, linking them to other
function blocks as required to carry out the desired control scheme.
8. Send the block to the Type SLC controller.