Siemens SIMATIC NET User Manual

Planning/configuring
7.2 Configuration
Optical link module
66 Operating Instructions, 01/2020, C79000-G8976-C270-06
You will find the factors a, b and c in the following tables:
Data rate
a
b
c
12 Mbps
1651
240
28
6 Mbps
951
120
24
3 Mbps
551
60
24
1.5 Mbps 351 30 24
500 kbps
251
10
24
187.5 kbps 171 3.75 24
93.75 kbps
171
1.875
24
45.45 kbps
851
0.909
24
19.2 kbps
171
0.384
24
9.6 kbps
171
0.192
24
Constants for calculating the slot time with the DP standard (redundant optical ring)
Data rate
a
b
c
12 Mbps
1651
240
28
6 Mbps
951
120
24
3 Mbps
551
60
24
1.5 Mbps
2011
30
24
500 kbps
771
10
24
187.5 kbps
771
3.75
24
93.75 kbps
451
1.875
24
45.45 kbps
851
0.909
24
19.2 kbps
181
0.384
24
9.6 kbps 171 0.192 24
Constants for calculating the slot time with D
P/FMS ("Universal") and DP with S5-95U (redundant
optical ring)
Minimum slot times for OLM / G11-1300 and OLM / G12-1300
With OLM / G11-1300 and OLM / G12-1300, the minimum slot times must be kept to as
shown in the following table at data rates of 12 Mbps, 6 Mbps, 3 Mbps and 1.5 Mbps:
Data rate
Minimum slot time
12 Mbps
3800 t
Bit
6 Mbps
2,000 t
Bit
3 Mbps
1,000 t
Bit
1.5 Mbps
530 t
Bit
If the calculated slot time is shorter than the minimum slot time, use the minimum slot time
from the table above as the configured slot time.

Siemens SIMATIC NET Specifications

General

Category	Industrial Communication Software
Manufacturer	Siemens
Operating Systems	Windows, Linux
Protocols Supported	PROFIBUS, PROFINET, OPC UA
Compatibility	Siemens PLCs, Third-party devices with supported protocols