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Protocol PAK (GPT) Source Code Library

The Protocol PAK Knowledge Database is an accumulated collection of responses to common support questions submitted to our technical support staff during customer implementation of various protocol source code libraries. Following is a list of these support questions. Click on the Item that best fits your situation to download an associated document.

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Item	Title	Protocol	Description
1	IECPT Transmission of Class 1 and 2 data	IEC 870-5-101	Provides additional help for understanding transmission of Class 1 and Class 2 data, including rules for scheduling and inclusion of specified point types.
2	IECPT Balanced Mode	IEC 870-5-101	Contains additional help to users deploying the IECPT in balanced mode.
3	Revision Numbering	All	Explains meanings of source code library code?release revision numbers
4	Replacing Test DAC Routine	All	Describes how DAC test software can be replaced with user written modules
5	Accumulator Freeze and Reset	All	Explains interface between library and customer code related to accumulator freeze and freeze-and-reset commands
6	IndacticPT Indication Processing	Indactic 33/41	Explains how class 1 and class 2 digital point events are handled within Indactic 33/41 protocol
7	IECPT Comm Interface	IEC 870-5-101	Clarifies interface to the customer written serial communication API (COMM) for IEC 870-5-101 protocol
8	Assigning DNP Variables to an Event Class	DNP3	Clarifies point assignments to DNP3 event classes 1, 2 and 3
9	Resource Management	All	Provides details on resource management, memory allocation, and thread execution
11	Analog Deadbands	All	Describes analog deadband processing both for protocols that directly support this feature, and for those that assume deadband values are configured within the RTU
12	Request Processing	All	Clarifies how selected requests are passed into the GPT for processing. Includes explanations for GetObject, Read, Write, Read Events, Ack Events, and Write Events.
13	Smart Communication	All	Explains how the user can improve communications efficiency by parsing data-link layer messages in the COMM, instead of the GPT
14	DAC Variable offsets	All	Describes how the GPT views static data managed by the user application
16	Master Mode Commands	IEC 870-5-101	Describes how to issue communication requests when operating a master mode PT component, with emphasis on IEC 870-5-101 protocol
20	Control Translation	All	Presents an example for passing a control from a master PT computer to a slave PT component, and is useful when two separate protocols have been purchased for the purpose of building a protocol translation package. Examples are provided for IEC 870-5-101 protocol, but also apply to other protocols.
21	DNP3 Master Mode	DNP3	Provides hints for implementing DNP3 Master Mode protocol
22	IEC Variable Change Processing	IEC 870-5-101	Describes how to force variables (points) to be included in a Class 2 poll response, based on the point having changed value
24	IEC Master Mode Event Processing	IEC 870-5-101	When operating in master mode, describes now time-stamped event processing is impacted by the value of IPROP_IEC_SYSTEM_QUEUE
25	IEC Master Clock Sync	IEC 870-5-101	Explains how to process clock synchronization requests in IEC 870-5-101 master mode
26	IEC System Queue Processing	IEC 870-5-101	For IEC 870-5-101 translation mode, explains how to move events from the system queue to individual data processing routines.
27	IEC Link Handling	IEC 870-5-101	Provides tips for maintaining IEC 870-5-101 link status, for systems with infrequent line activity
28	Telegyr Data Objects	Telegyr 8979	Clarifications on coding data objects for Telegyr 8979 protocol
29	DAC Static and Event Writes	All	Explains table structure differences relative to accessing input point data for event change processing and for static data reporting. Information presented is applicable to master mode operations.
30	PGandE Read Time	PG&E 2179	Explains processing of the PG&E 2179 protocol "Read Time" function
31	IEC Controls	IEC 870-5-101	Presents details on processing control output requests for IEC 870-5-101 protocol
32	IEC Counter Interrogation	IEC 870-5-101	Presents details on processing IEC 870-5-101 counter interrogation requests
33	Dial-Up Circuits	All	Describes how to interface to a dial-up communication environment
34	Version 3.0 Upgrade	All	Describes issues upgrading from Protocol PAK releases 2.9 and earlier, to releases 3.0 and later. Migration between these two levels occurred during the end of 1999 and beginning of 2000
35	IEC Parameter Handling	IEC 870-5-101	Describes handling of IEC 870-5-101 ASDU Types used for passing parameter data
36	Request Optimization	Several	A class of protocols allows multiple DAC Requests to be transmitted as a single request. Examples of protocols that support this feature include DNP3, Telegyr 8979 and SES92. This document defines a number of possible approaches to optimize processor usage when this capability is used
39	GPT Scheduling	All	Describes various ways of providing executing time to the Protocol PAK environment, in order to support configuration into a wide range of real-time operating system strategies
40	Modbus Object IDs	Modbus	Describes how the DAC objects ids are assigned, particularly how they are adjusted when multiple protocols are supported in a single application
43	IEC Sample Code	IEC 870-5-101	Instructions for configuring a basic user DAC interface, designed for the new Protocol PAK user
44	Network Communication	Several	Instructions for configuring user communication code for network (LAN/WAN) operations
45	Modbus Master Debug	Modbus	Hints for debugging Modbus messages when operating in master mode

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