Emerson MONITORING OpenComms Manuel D’Utilisation

The maximum specification may be exceeded if measures are taken to 

drive or boost the EIA-485 communication line. Two wire EIA485 

repeaters are available through the Liebert Corporation. SiteScan’s 

“REPOPT” will work sufficiently for this application. Consult the 

SiteScan price book for pricing schedule and alternative solutions.

The OpenComms NIC supports data in a register block as one of the 

following types: Signed integer (16 bit) / Unsigned integer (16 bit) / 

Signed long (32 bit); IEEE floating-point (32 bit); Null terminated 

String.
A datum should consist of one or multiple registers. The leftmost byte 

contains the MSB and the rightmost byte contains the LSB.