exKa Engineering
Ignition PLC driver

exKa SRTP Driver for Ignition

Intended for supported Emerson PACSystems RX3i controllers, including applicable legacy GE-branded models.

Early accessVersion 0.1.0Emerson PACSystems RX3iIgnition 8.3 (8.1 coming soon)SRTP (GE Ethernet)
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Overview

The driver provides direct symbolic read and write access to PACSystems controllers from Ignition. Simply publish the required PLC variables and access them by name in Ignition, without assigning register addresses or maintaining a separate address map.

The driver runs within the Ignition Gateway and communicates directly with PACSystems controllers over SRTP, without requiring an external OPC server. Direct reference memory access is also supported for existing applications that use addressed memory.

Capabilities

What it does

Symbolic variables by name

Item path is the PLC variable name, including arrays, 2-D elements, UDT members and UDFB outputs. Names resolve on the CPU, so a new PLC variable works as soon as the tag is created.

Reference memory too

%R, %AI, %AQ as INT, UINT, DINT, UDINT, REAL and strings; %I, %Q, %M, %T, %S, %SA, %SB, %SC and %G as bits and bytes.

Follows PLC downloads

The driver tracks program downloads automatically, and tag quality reflects both the CPU state (RUN / STOP) and the connection.

Verified writes

Writes are enabled per device. Every write is range-checked, never truncated and read back to confirm; BOOL writes are bit-exact.

Diagnostics built in

PLC state, sweep time, privilege, request cost and the live read interval of every tag, visible from Ignition.

Read and write only

The driver uses a fixed set of data services. It never runs or stops the CPU, transfers programs or forces I/O.

Technical specifications
Data types
All elementary types and arrays, plus UDT and UDFB members
Measured performance

Sized from measurements, not estimates

6,947
historised tags at 100 ms, 32 equipment units of mixed device UDTs (VSD, PID, valve, AI, DI), 9 ms sweep
21,703
historised tags at 250 ms, 100 equipment units of mixed device UDTs (VSD, PID, valve, AI, DI), 9 ms sweep
4,780
published variables (10,815 Ignition tags) at 250 ms, UDT arrays, scalars and UDFB instances, 15–20 ms sweep

Interested in exKa SRTP Driver for Ignition?

Tell us about your site, controllers and Ignition version. Trial and early-access sites get direct engineering support during installation and commissioning.

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This driver is independently developed and supplied by Exka Pty Ltd. It is not sponsored, approved or endorsed by Emerson, GE or Inductive Automation. References to Emerson, GE, PACSystems and Ignition identify intended compatibility only. Third-party names and trademarks belong to their respective owners.

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