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Seneca KEY Series - I;O Mapping Section; Setup Iec Variables Section

Seneca KEY Series
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User Manual
IEC 61850 MODBUS
GATEWAYS
ALL RIGHTS RESERVED. NO PART OF THIS PUBLICATION MAY
BE REPRODUCED WITHOUT PRIOR PERMISSION.
www.seneca.it
MI00705-0-EN
It represents the starting Modbus address of the command (in the case of a Seneca device it is filled in
automatically).
TARGET MODBUS REQUEST TYPE
It represents the type of Modbus command to use (Read Holding Register, Coil etc.).
In the case of a Seneca device it is filled in automatically.
TARGET REGISTER DATA LENGTH
Allows you to set how many Modbus registers are required in the command.
TARGET MODBUS WRITE PERIODIC TRIGGER [ms]
Represents the time interval of execution of the command
ENDIAN SWAP
Allows you to swap a register read by Modbus, i.e.:
NONE: no swap
BYTE: shifts the high byte with low byte (for example Modbus reading 0xAABB will be converted to 0xBBAA)
WORD: In the case of a data type greater than a Modbus register (e.g. single precision Floating Point
registers) it allows you to set which word (register) to use as the most significant part, for example:
Register 1 = 0xAABB
Register 2 = 0xCCDD
will become a single value 0xAABBCCDD if the parameter is NONE, otherwise 0xCCDDAABB if this
parameter is active
BYTE AND WORD: as in the previous case but there will also be a byte swap, for example:
Register 1 = 0xAABB
Register 2 = 0xCCDD
Will become 0xDDCCBBAA
9.1.4.5. “I/O MAPPING” SECTION
Allows you to move the contents of the bytes of the read and write buffers.
9.1.4.1. “SETUP IEC VARIABLES” SECTION
Allows you to define an IEC variable from the read or write buffer
MNEMONIC NAME
This is the name of the variable that will appear in the IEC61850 client
READ/WRITE
Selects whether the variable should be created from the read or write buffer

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