Modbus System Server

EMS-ESP provides a server with general read only information with unit ID 1. It provides the following data:

Name	Description	Register offset	Register count
NUM_DEVICES	The number of devices recognized on the EMS bus	1	1
DEVICE_TYPE_AND_ID	The device type and ID for each device. "n" in the register offset is the index of the device with 0 <= n < NUM_DEVICES. The first byte of the 16 bit value contains the device type, the second byte contains the device ID.	1000 + n	1