Siemens SIMATIC S5 Manual page 212

S5-95U, SINEC L2
Distance Table for RS 485 Technology:
Baud Rate in
Kbits/s
1
9.6; 19.2; 93.75 1.2 km
187.5 1.0 km
500 0.4 km
1500 0.2 km
Caution
!
In extensive networks, the potential difference between two stations may exceed ± 7 V.
Should this be the case, make sure that the necessary equipotential bonding measures
are taken, otherwise the SINEC L2 interface will be destroyed.
Distance Table for Glass Fiber Optic Cable Technology:
Baud Rate in
Kbits/s
1
9.6; 19.2; 1.4 km
93.75; 187.5
500 1.4 km
1500 1.4 km
Interrupt Response Time and PLC Cycle Delay Time
Increasing the interrupt response time
Since process interrupts cannot interrupt on-going SINEC L2 processing, the increase in the
interrupt response time - worst case - corresponds to the cycle delay time caused by the current
SINEC L2 function. In the case of programmer functions, the worst-case increase in the interrupt
response time is 850 µs. (For calculation of the interrupt response times without SINEC L2 see S5-
90U/S5-95U System Manual, section 10.3).
The table overleaf lists the worst-case times for PLC cycle delay times in connection with data
transmission over the SINEC L2 LAN.
EWA 4NEB 812 6112-02
Number of Segments Connected in Series
2 3
2.4 km 3.6 km
2.0 km 3.0 km
0.8 km 1.2 km
0.4 km 0.6 km
Number of Segments Connected in Series
2 3 4
2.8 km 4.2 km 5.6 km
2.8 km 4.2 km 5.6 km 7.0 km 8.4 km -
2.8 km 4.2 km -
Technical Specifications; Cycle Delay Times
4 5 6
4.8 km 6.0 km 7.2 km
4.0 km 5.0 km 6.0 km
1.6 km 2.0 km 2.4 km
0.8 km 1.0 km -
5 6
7.0 km 8.4 km
- -
7 8
8.4 km 9.6 km
7.0 km 8.0 km
2.8 km 3.2 km
- -
7 16
9.8 km ....... 23.8 km
-
- -
E-3