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Parameters of DB1
C.3
General SINEC L2 Parameters - block Identifier SL2
Meaning
Table C-1
SL2 Parameters
1
Parameter
Values
TLN
1 ... 30
(Address)
STA
AKT
PAS
BDR
93.75
187.5
(Baud_rate)
500
1500
HSA
1 ... 126
TRT
256 ...
*
1048320
(T
)
TR
1
Designations given in parentheses comply with DIN 19245.
*
Specify the value in bit times. A bit time is the time elapsing during transmission of one bit. It is the reciprocal of the
baud rate.
C-4
With block identifier SL2, you enter the general parameters for the SINEC
L2. An explanation of individual parameters can be found in Table C-1.
Observe the syntax of DB1 (see Appendix C.2).
Station number
The station number which you enter with parameter TLN for the CP 541 must not
be entered in the priority list (parameter PRI, COM block).
The station number must be identical to the node address of the connected pro-
grammable controller.
Station status
Active
You can install message-oriented communication (PLC-PLC connection),
broadcast and data-oriented communication (DB connection) in parallel.
Passive
You can only establish a data-oriented DP connection.
Token management does not take place in the CP 541. The token rotation time
is reduced; this corresponds to an acceleration of communication in the SINEC
L2.
Baud rate
Specify the transmission rate in Kbps. Ensure that you use a decimal point to sepa-
rate the decimal places in DB1.
This parameter must be set identically in all stations. Use the value of the station
with the lowest maximum transmission rate. Observe the bus topology, such as
cable lengths.
With parameter HSA, you specify the highest station number of all active stations
present in SINEC L2.
You take this value from the configuration of your SINEC L2. Note that with each
PLC-PLC connection and each broadcast, the sending CP 541 is an active station.
Target rotation time (for token)
The token rotation time is the calculated average time elapsing until all stations
have had the token once.
A calculation of the token rotation time is given in detail in Appendix C.7.
This parameter must be set identically in all stations.
Meaning
Communications Processor CP 541
EWA 4NEB 812 6188-02
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