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ea
s
yNet network
554
02/16 MN05013001Z EN
NET operands nRN.. (input) and nSN.. (output)
To use these NET operands, the sending and receiving
station must each have a circuit diagram.
The NET stations for bit exchange must always use the RN
and SN in pairs (
Writing via SN
The NET operand SN (
S
end
N
ET) is used for sending bit data
from one NET station to another. To do this you select the SN
operand in a coil field.
Reading using RN
The RN (
R
eceive
N
ET) NET operand is used to receive the bit
data that another NET station has sent. To do this you select
the RN operand in a contact field.
SN-RN combination
As the RN and SN must always be used in pairs, the
following rule applies:
• on the sending station and receiving station use the same
operand number for each SN/RN pair to be formed.
• in the circuit diagram of the sending station you set for the
SN operand (coil) the station number (NET ID) of the
receiving station.
• in the circuit diagram of the receiving station you set for
the RN operand (contact) the station number (NET ID) of
the sending station.
h
The operands *RN.. and *SN.. are always NET operands
and must only be used with the preceding NET ID as nRN..
and nSN... The NET operands are only available in the
standard circuit diagram. Placing a NET ID in front of the
operand is explained on page 551. Without a preceding
NET ID, the circuit diagram test SAFETY TEST will report
that Rule 29 has been broken (
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