Hi Everyone, I'm having an issue with getting an OMRON CP1H with an EIP21 module using explicit messaging back and forth with an AB PLC. I'm using a CompactLogix L16ER to test the setup in place of the future Micro850 that will be used. I've used the Network configurator to set up tag sets with instance IDs for the consume/produced tags. The data being transmitted is 240bytes in the form of an array of DINTs. On the AB side I've setup a get and set attribute message with the setup as follows; Get Attribute (Read): Service Code: 10 Class ID: 4 Instance ID: 111 (Matches Network Config) Attribute ID: 3 Set Attribute (Write) Service Code: E Class ID: 4 Instance ID: 101 (Matches Network Config) Attribute ID: 3 The MSG command executes as expected on the AB without error. The get attribute works beautifully, but the set attribute completes with no response on the OMRON (no write). Am I missing something here? Thanks!