Galil has introduced Modbus slave support for the following controllers: the DMC-40x0, DMC-42x0, and DMC-41x3.  These controllers now have the option of being either a Modbus master or slave.  

Because Modbus/TCP is an open protocol, these controllers easily integrate with other Galil Ethernet products or third party devices.  The RIO-47xxx and DMC-3x01x product lines also have this feature set, expanding the availability of using Galil controllers in these modular or remote applications.

An example of how these enhancements can be utilized includes implementing a third party HMI panel as a Modbus master while communicating with a DMC-40x0 and a RIO-47xxx as Modbus slaves.  The HMI can read and write to different memory locations and I/O points on the DMC and RIO which can also trigger subroutines on either the DMC or RIO.  

Existing controllers can receive these enhancements by downloading the latest firmware.  Please see Galil's firmware download and release notes page for more information.