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SIF5600 - Manual - 03 - 2008
Communication (drivers)
the protective device implements the MODBUS rtU protocol for communicating via the rS232 inter-
face with the thySetter setting software and via the rS485 interface with the field bus.
All major codes according to the Modbus standard are envisaged; for a complete description and
map of the addresses, please refer to the appendix mentioned further in this manual.
MMI (drivers)
this handles the menus, available both on the panel and by means of Modbus messages, which
may be run from commands using the keyboard, LeDs and LcD display.
MMI information is stored in eePrOM and may be loaded remotely by means of the basic protocol
functions.
Data Base (application/drivers)
Using modular criteria, the database is structured in three sections:
- rAM containing the volatile data,
- ree and PAr containing the data recorded in non-volatile memory.
Duplication of the data into two memory banks is envisaged with a continuous control system based
on the cross checking of the consistency of the stored data. Modification of the calibration pa-
rameters is split into two stages; in particular, data undergoing modification is placed in temporary
memory and subsequently confirmed permanently (Store command) or discarded (clear command).
Instead, the area identified as ree is set aside for recording data which does not require the Store
command for storage, or date written directly by the application (e.g.: counters,...)
Self-test (application)
this function cyclically monitors the operation of the main hardware and software functions without
affecting the process cycle with any significant delays.
In particular, the functions monitored are the following,
- the reference voltage levels,
- output relay coil continuity,
- the program flow control by monitoring the execution times and stack area occupancy,
- checking the pilot wires (accelerated logic system),
- the consistency of the data in the ree and PAr blocks, duplicated in the eePrOM.
Development tools
For the development of the project, a cASe instrument has been developed, responsible for the opti-
mized production of software code for the management of collaboration, the database and the MMI
data and the Xml files used for communication. the automatic code generation criteria ensures the
quality of the result in terms of the reusability, verifiability and maintainability of the software life
cycle.
4.3 FUNctIONAL DeScrIPtION
Measurements
Measurements are available as the rMS values of the fundamental component of each of the three
phase currents and the residual current.
IL1, IL2, IL3
(selectable in primary amperes or as a value relative to IN)
Ie
(selectable in primary amperes or as a value relative to IeN)
Note: in the SIF5600 two-phase versions, the IL current is not measured and a null value is shown regardless of the real value of the current
present in the phase without the CT.
Counters
Start and trip counters are provided for each protective device function threshold assigned to at
least one output relay, with a range of 0...9999 and a resolution of 1.
Upon reaching a value of 10000 each counter is reset (zeroed).
All counters may be reset with a single command. the counters are:
counter Start
I
>
counter Start
I
>>
counter Start
I
e
>
counter Start
I
e
>>
counter trip
I
>
counter trip
I
>>
counter trip
I
e
>
counter trip
I
e
>>
Inputs
the following information is available:
- the logic state of each block input and output circuit:
Blin1, Blout1-2
- the logic state of each binary input (circuit breaker status):
Status 52
52b On
52a Off