General Contract Monitor
The CygNet General Contract Monitor (GCM) is a multi-purpose application integrated with the CygNet SCADA system used to retrieve precise current volume and flow data from points to calculate the volume and flow rates required to meet the nomination for a given day. This tool helps operators to efficiently monitor volume and flow, to make ad hoc distribution choices, and to meet nomination goals.
The CygNet General Contract Monitor (GCM) makes the following commodity volume calculations:
- the current volume of natural gas in a pipeline in MMCF. For pipelines containing natural gas, the GCM uses an Energy Density input to calculate Energy.
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- the current volume of petroleum liquids in a pipeline in MMCF, for example. For pipelines containing liquids, the GCM uses a Gravity input to calculate Mass.
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| Click the thumbnail to see a sample CygNet GCM Nomination Grid |
CygNet General Contract Monitor EIE
The General Contract Monitor (GCM) EIE is a back-end calculation engine comprised of two parts: an editor, which is used to configure the device and which is stored in the Device Definition Service (DDS); and a driver, which is used by the Universal Interface Service (UIS) to perform calculations.
The GCM EIE retrieves, organizes, and stores calculated values using a Point Scheme. Unlike some other EIEs, the GCM EIE is not template based. Instead, you use the GCM editor in the DDS to set up the data you want to retrieve and how to retrieve it. All calculations result in updated point values. See Configuring the General Contract Monitor.
A 64-bit version of this EIE is available. See 64-bit Device Drivers.
CygNet GCM Nomination Grid
The General Contract Monitor (GCM) feature also includes a human-machine interface (HMI) component: the CygNet GCM Nomination Grid ActiveX control. You can use it to create a custom HMI screen to display current volume and flow point data in a CygNet Studio or CygNet Vision screen. You can make ad hoc data display changes using the HMI screen, and it also displays various states of notification and alarm. Grid rows correspond to individual facilities, while columns correspond to a UDC or other property; the intersection of a given row and column displays a point value. See CygNet GCM Nomination Grid for more information.
For more information regarding scripting the CygNet GCM Nomination Grid Control object, see CxHmiGcm.
Note: The General Contract Monitor was previously called the Gas Contract Monitor. It was renamed when petroleum liquids were added as a pipeline commodity type. The Gas Contract Monitor feature previously replaced the CygNet Nomination Monitor, which has reached its official end of life.
To address questions or circumstances beyond the scope of the CygNet Help, Additional CygNet Resources are available.
More:
General Contract Monitor Overview
