pag. 12
MDE/C133 2561 001
MX3IPG2A
4.15 RS485 serial communication and MODBUS protocol
Concerning the communication of devices provided with
software version 2.00 and subsequent, three different versions
are possible:
- whitout any communication card (version
MX3IPG2A .11 e .12);
- provided with LonWorks
(TM)
communication card (version
MX3IPG2A .61 e .62);
- provided with Modbus communication card (version
MX3IPG2A .71 e .72);
The identification of the installed communication card is
automatic.
When using an unit provided with LonWorks
(TM)
communication
card, it's required first to effect the relay wiring according to its
wiring diagram and later proceed with the configuration of all
connected devices; the automatic configuration of connected
devices is possible by connecting a PC provided with PCLTA10
or SLTA10 card, in which CORMOX2 software has been
installed.
When using a device provided with Modbus communication
the configuration of each relay may be realized by the front
interface, or by the IRMA2 program installed on a PC connected
to the relay via front plug. The configuration may be realized
also on relays not jet connected together and may be eventually
organized in files together with all other settings.
Modbus communication card configuration requires:
PARAMETER VALUE
Speed 300 Baud
600 Baud
1200 Baud
2400 Baud
4800 Baud
9600 Baud
19200 Baud
38400 Baud
Parity NONE
EVEN
ODD
Data Bit 7
8
Stop Bit 1
2
Address 1 - 255 (0 broadcast)
This parameters can be programmed in local or remote mode.
So, the following extension of the 'RELAY DATA' menu is
available:
[MX3IPG2A ] relay type
[Sw Vers 2.00/01] software version
ñ ò
[PLANT IDENTIFIER]
[GenPan ] ðplant identifier
ñ ò
[SPEED 38400 Bb] ðspeed setting
[PARITY NONE ] ðparity setting
ñ ò
[DATA BIT 8 ] ðdata bit setting
[STOP BIT 1 ] ðstop bit setting
ñ ò
[ADDRESS 111 ] ðaddress setting
[ ]
On demand is available documentation about LonWorks
(TM)
and Modbus
versions.
4.16 Fault recorder
The device can record the course of input currents (Ia, Ib, Ic, Io)
and the logic states of the 8 LED's, the 5 auxiliary relays, the
3 digital inputs and the 3 additional timers. The total recording
time equals 2.5s, and can be divided into variable time before
start-up and variable time after start-up. The fault recorder
function can be started for: tstart, tripping, enabling of digital
inputs and timers. The selection of the starting parameters,
the graphic display and reset of fault recorder can be made
through a PC or a network. The function can even be reset by
interrupting the auxiliary voltage for a short while.
4.17 Checking tripping circuits for continuity
The use of a digital input enabled by normal de-energizing
combined with one of the TX timers allows the tripping coil
circuit to be monitored for continuity, whether the breaker is
closed or open.
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