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
26
e-mail: [email protected]
General guidelines:
•
The adress size settings (parameters on line 3-6 in the table on the following page) must be
identical to those which are used by the SCADA system (-101 or -104 slave).
•
The values of Common and Link Adress must match for master and slave.
•
If the checkbox
Use master common address
is checked, the following applies:
o
The master cannot have a value in the upper octet of the object addresses.
o
All objects of all slaves must have unique object addresses. The SCADA system interpretes it
as all objects are from the same RTU, i.e., the IPC4020 that acts -101 master.
o
For the -101 master to be able to resend commands from the remote control center, each
upper octet of every object address
must
be identical to the Common address of the slave.
Please see the following examples.
▪
Binary output 3, in the second slave, shall be controlled by the SCADA system.
▪
In this example, the second slave has Common address 5.
▪
Binary output 3 has typically object address
21003
in the factory settings.
This must be changed to
5.21003
(structured address), which equals 348 683
decimal.
o
The common address for the slave must be between 1 and 254.
•
If the checkbox
Use master common address
is NOT checked, there are no restrictions to the choice
of object addresses. In that case, the remote control system experiences all slaves as separate
RTU’s.
•
If contact with a slave is lost, all objects belonging to that slave are sent to the remote control
center with the Invalid flag set. This, however, is only done if an interrogation prevously has been
made from this specific slave. In addition, an object indicating lost slave communication is activated
(see section 7.3.3)