MICROENER IM30-CV, Руководство по эксплуатации

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IM30-CV
Doc. N° MO-0150-ING
Rev. 1
Date 14.07.2003
Copyright 2010 - Microener Firmware: 1.0X Pag 7 di 24
5. OUTPUT RELAYS
Five output relays are available (R1, R2, R3, R4, R5)

The relays R1,R2,R3,R4 are normally deenergized (energised on trip): these output relays are user
programmable and any of them can be associated to any of the IM30-C's functions.
For some function both instantaneous and time delayed elements are provided.
One relay eventually controlled by the instantaneous element of one function picks up or drops out
as soon as the measured input value gets respectively into the operation or the reset zone.
When the time of the delayed element of the same function has expired the relay is supposed to trip
the circuit breaker.
If after that time the input value still remains into the operation zone (Breaker Failure to open),
the relay controlled by the instantaneous element is anyhow forced to reset after a programmable
wait-time
[
tBF
]
, thus eliminating any interlock of the backup protection.
It has to be remarked that the programming structure does not allow to associate the same relay at
the same time to instantaneous and delayed elements.
Therefore any relay already associated to any time delayed element cannot be associated to any
instantaneous element and viceversa.

The relay R5 , normally energised, is not programmable and is deenergized on:

internal fault

power supply failure

during the programming
6. SERIAL COMMUNICATION
The relays fitted with the serial communication option can be connected via a cable bus or (with proper
adapters) a fiber optic bus for interfacing with a Personal Computer (type IBM or compatible).
All the operations which can be performed locally (for example reading of measured data and changing
of relay’s settings) are also possible via the serial communication interface.
Furthermore the serial port allows the user to read the demand recording data.
The unit has a RS232 / RS485 interface and can be connected either directly to a P.C. via a dedicated
cable or to a RS485 serial bus, thus having many relays to exchange data with a single master P.C.
using the same physical serial line. A RS485/232 converter is available on request.
The communication protocol is MODBUS RTU (only functions 3, 4 and 16 are implemented).
Each relay is identified by its programmable address code (NodeAd) and can be called from the P.C.
A dedicated communication software (MSCOM) for Windows 95/98 (or later) is available.
Please refer to the MSCOM instruction manual for more information.
Microelettrica Scientifica.