Xylem HYDROVAR Smart - Manual (Page 42)

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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 : EEPROM-ERROR (corresponding data block malfunction)
ERROR 2 : Security error / Software protection error
ERROR 4 : Display unit / Push buttons error (e.g.: jammed key)
ERROR 5 : EPROM-error
ERROR 6 : Program error: Watchdog error
ERROR 7 : Program error: Processor pulse error
ERROR 8 : Program error: invalid processor command
These ERROR signals can be reset by cutting off the power supply or pressing all three
buttons (П,Р and ¾) together for about 5 seconds.
If the error signal should appear again, contact customer service and provide a detailed
description of the error.
9 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:
serial data transmission – RS485
HYDROVAR-Smart – Protocol 120