D-Series with FF Option Installation, Operation & Maintenance
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Section 2: Operation
This section of the manual provides operational information for configuring the SCM-FF device on the
FOUNDATION Fieldbus Host Control System. This section includes both required Control Configuration and
optional Monitoring Configuration information.
Control Configuration (Required)
The TopWorx FOUNDATION Fieldbus products should be configured for operation using a single Discrete
Output (DO) Function Block with Channel Parameter assignment of 5. This module configuration will
provide a multi-value DO Block that will fully control a single or a dual output device. The Readback_D
parameter will provide actual valve position based on the Open / Closed Limit Switches in the device.
Discrete Input (DI) Blocks are neither required nor desired for feedback function.
The values of these parameters are as follows:
Figure 4
NOTE:
TopWorx has pre-configured modules and faceplates available for DeltaV control systems.
Contact the TopWorx factory or www.topworx.com for more information.
The Transducer Block is shipped from the factory in the OOS (Out of Service) Mode to allow field
installation/testing using the SCM calibration switch. Once the installation and the configuration above
are complete, The Transducer Block must be placed in the AUTO (Automatic) Mode for device
operation.
The complete device control algorithm should be as depicted below:
DO Channel
Assignment
Definition Readback_D
Valves
Control Method
5 Open/Close/Stop
Outputs
0 - Closed
1 - Open
2 - Stopped
3 - Opening
4 - Closing
Single Block,
Dual Action
Readback_D
Parameter
Discrete
Control
Function
Block
Discrete
Output (DO)
Function
Block
DO
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