HYDROCAL 1005 Manual for Installation and Operation
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A. Point to Point
A point-to-point connection / communication is the simplest setup. The host (PC) is connected di-
rectly to one HYDROCAL device. The connection can use the RS232, the RS485 or the modem. The
default configuration for a HYDROCAL device assumes a point-to-point connection. The same ap-
plies to HydroSoft.
I. RS485
The RS485 can be used for long connection distances (up to 1000 m). It is implemented as a two-
wire interface with half-duplex and a soft-handshake.
HydroCal
HydroSoft
Assure that the baud rate is matching and that the correct COM port is chosen in HydroSoft. Also
check the RS485 checkbox to indicate the half-duplex connection. A RS485 adapter might require
some special setup of the other checkboxes.
ART
The Hydrocal 1005 hardware is able to support a special kind of automatic receive transmit control
ART. When the corresponding checkbox in the RS232/485 setup screen is active, the RS485 lines
are activated in special way. For this setup to work, the RS485 bus lines must be biased correctly.
The default setup for this property is: ART disabled (i.e. checkbox inactive).
PC RS485 Adapters
Connecting a PC to the RS485 of a HYDROCAL device usually requires an adapter (interface con-
verter). Depending on the properties of the adapter in use, the RS485 related check boxes in Hydro-
Soft must be set accordingly.