ignition - PLC Programming & Automation

SCADA PLC Integration: Connect Ignition to ControlLogix

September 12, 2026January 19, 2024 by PLC

Timing chart of a one second SCADA tag group: the group tick, the CIP read request, the controller reply about 60 ms later, and the historian insert

Pick the protocol, prepare the controller tags, add the device in Ignition, set a sane tag group, then prove the link survives a network drop.

OPC UA PLC Integration: From PLC Tag to SCADA Client

September 12, 2026January 18, 2024 by PLC

Timing chart of an OPC UA subscription showing 250 ms sampling pulses, a PLC tag value change, and notifications leaving at the 1 second publishing interval

Connect a PLC to SCADA with OPC UA: KEPServerEX channels, the S7-1500 built-in server, certificate trust, subscription rates and why OPC DA kept breaking.