Siemens SINEC L2 User Manual

System Description S5-95U, SINEC L2
Rules for Setting the Basic Parameters
• TLN 0 (default) is not allowed for the S5-95U as L2 station (TLN 0 is reserved for a pro-
grammer). You must change the value for TLN 0, otherwise the programmable controller stays
in the STOP mode.
• Do not delete any relevant parameters, otherwise the PLC will stay in the STOP mode! Delete
any irrelevant parameters (in the case of passive S5-95Us).
• The following basic parameters must be the same for all stations in the SINEC L2 network:
BDR, HSA, TRT, SET, ST, SDT 1 and SDT 2. Always take the basic parameters of the slowest
station! The slowest station is the station with the longest slot time in the SINEC L2 network.
Example: Communications between the CP 5410, S5-95U and CP 5430-0: preset baud rate
187.5 kbaud. The CP 5430-0 with 400 bit time units has the longest slot time
(default value). Set the basic parameters of the CP 5430-0 (187.5 kbaud) for all
stations (see Table 1-5).
Communications with S5-95Us (homogeneous S5-95U networks)
Define the arguments of the BDR, SET, ST, SDT 1 and SDT 2 basic parameters for the S5-95U
programmable controllers in DB1 (see Table 1-3).
Table 1-3. Defining the Basic Parameter Arguments for S5-95U PLCs
Baudrate
Basic in kbaud
parameters
in bit time units
15009.6 19.2 93.75 187.5 500
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SET
ST
SDT 1
SDT 2
0 0 0 0 0 60
73 76 99 170 400 1000
12 12 12 12 12 150
40 60 80 150 360 980
Example: Define the baud rate as 187.5 kbaud in DB1. This gives the other basic parameters
as follows: SET 0 ST 170 SDT 1 12 SDT 2 150.
Bit time unit
You must specify certain parameters, e.g. the target rotation time, in bit time units. To calculate the
times in milliseconds from the bit time units, use the following formula:
Time (in milliseconds) = e.g., time= = 0.104 ms
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Number of bit time units
Baud rate (in kbits/s)
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1 bit time unit
9.6 kbits/s
1-10 EWA 4NEB 812 6112-02

Siemens SINEC L2 Specifications

General

Brand	Siemens
Model	SINEC L2
Category	Controller
Language	English