IPC402x-UM-2209-1-2.x.x (en)
Ensto Protrol AB
Phone: +46 31 45 82 00
Alfagatan 3
internet: www.protrol.se
431 49 Mölndal, SWEDEN
9
e-mail: [email protected]
4.3 Internal Supervision
Internal check of CPU-near hardware and software modules is performed at startup.
▪
Memory check
–
activates IRF
▪
Flash memory check
–
activates IRF
▪
Expansion board check
–
activates IRF
▪
Execution of software modules
–
activates IRF
▪
Supervision of external interfaces
–
rapported in Event Log
Supervision of expansion boards and execution of software modules are performed continuously.
4.4 Interfaces
4.4.1 RS485/RS422 port for IEC 60870-5-101 Slave and PDCIO
IPC402x has a signal interface on the left of the front panel for connection to the remote control center
using the communication protocol IEC 60870-5-101.
This port supports 2-wire (half duplex) communication. It is factory set to 8-E-1, i.e., 8 data bits, even parity
and 1 stop bit. With options where the front panel is modified, it is possible to handle both 4-wire (full
duplex) or RS232 communication.
There is built-in protection for surge voltages. However, cables for communication that may be subjected
to overvoltage must have a primary protection, for example Protrol OVP. As a rule of thumb, one can say
that cables that leave the building / station must be supplemented with a primary protection.
Terminals
Terminal/pin
Short name
Description
X11:1
TX+
Sender (plus)
X11:2
TX-
Sender (minus)
X11:3
RX(TX)+
Receiver (plus), (also sender when 2-wire)
X11:4
RX(TX)-
Receiver (minus), (also sender when 2-wire)
X11:5
TERM
Termination for receiver. Connect to X11:4 for activation
Terminering
The first (master) and last device (last slave) on the communication line should be terminated. This is
done on IPC402x by short-circuiting X11:4 and X11:5.
The terminals X11:3 and X11:4 are used for 2-wire communication. Configuration according to Chapter 7.2.
The terminal X11 is also used as the physical interface when the expansion device PDCIO is used. PDCIO is
connected to the terminals X11:3 and X11:4 in the same manner as when 2-wire-communication is
employed for communication with the remote control centre using IEC 60870-5-101.
Observe that PDCIO can only be used if IEC 60870-5-104 is used for communication with the remote control
centre.