Rs 485 - Interface - Xylem HYDROVAR Smart Manuel Opérateur

An error indication is given over terminal X2/1, X2/2 and X2/3 (changeover contact).
If no Error is active, the relay is switched on and terminals X2/2 and X2/3 are closed.
Attention If "AUTO - START ON" and "ERROR-RESET – ON" are programmed, the unit
can start again automatically after a power failure.
8.6 Additional Error signals:
ERROR 1
ERROR 2
ERROR 4
ERROR 5
ERROR 6
ERROR 7
ERROR 8
These ERROR signals can be reset by cutting off the power supply or pressing all three
buttons ( , and
If the error signal should appear again, contact customer service and provide a detailed
description of the error.
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RS 485 - Interface

Standardised Bus-Interface for communication between the inverters (Hydrovar-Smart and/or
Hydrovar Drive heads) and/or an overruling external control system.
The data protocol complies with ISO 1745 for RS 485 interfaces and contains the following
configurations:
Transfer rate : 9600 Baud (1 Start bit, 8 Data, 1 Stop bit)
An interface inverter RS 232/RS 485 is necessary in case communication with a V24 interface
of a PC or another external control system is wanted.
All parameters can be approached via the standard interface. The inline structure of the
Hydrovar-Smart Drive head can be obtained upon request.
For further information see:
: EEPROM-ERROR (corresponding data block malfunction)
: Security error / Software protection error
: Display unit / Push buttons error (e.g.: jammed key)
: EPROM-error
: Program error:
: Program error:
: Program error:
) together for about 5 seconds.
serial data transmission – RS485
HYDROVAR-Smart – Protocol 120
Watchdog error
Processor pulse error
invalid processor command
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