Changing Setpoints using INCOM Pass-Through on Modbus MINT
http://pps2.com/communications/files/INCOM/Modbus_INCOM_pass-through_V4.pdf (http://pps2.com/communications/files/INCOM/Modbus_INCOM_pass-through_V4.pdf)
I've attached a link to a document that explains how to send INCOM commands through a Modbus MINT using something called INCOM pass-through. The attached document includes example code written in VB2010, but the methodology would work for any programming language. If you want a copy of the source code or the published (install files), you can download both from: http://pps2.com/files/mb/index1.php (http://pps2.com/files/mb/index1.php)
The example I show is how to change a setpoint inside an automatic transfer switch controller (ATC-600 or ATC-800), but the method of writing an embedded INCOM message within the Modbus payload is the same. Also, the method for changing setpoints within a device works with any INCOM device with a write-able setpoint buffer (e.g. OPTIM circuit breaker trip units, IQ/DT/MP/FP series protective relays, etc.)