Siemens SIMATIC S5 Manual page 211

Technical Specifications; Cycle Delay Times
SINEC L2 Communications Services (Continued)
Layer 2 Services
- Amount of data per job
- Reachable destination address
(when sending data)
- Possible source address
(when receiving data)
- Number of layer 2 accesses
- SDA
- SDN
- RUP_SINGLE
- RUP_MULTIPLE
- SRD
FMA Services
- LAS_LIST_CREATE
- MAC_EVENT
- FDL_STATUS
- READ_VALUE
- TIME_TTH_READ
Programmer Functions
E-2
0 to 242 bytes
1 to 126
1 to 126
23 (SAP 33 to 54, 64)
Active station sends data to an
active or passive station
Active station sends data to
several active or passive stations
Active or passive station holds
data ready for fetching once only
by an active station
Active or passive station holds
data ready for fetching by several
active or passive stations
Active station sends data and/or
fetches data held ready for it from
an active or passive station
local service
(no additional bus load)
local service
(no additional bus load)
remote service
(additional bus load)
local service
(no additional bus load)
local service
(no additional bus load)
Integral Blocks
Integral Organization Blocks
- OB1 cyclical program scanning
- OB3 interrupt-driven program processing
- OB13 time-controlled program processing
- OB21 start-up program processing
(manual cold restart)
- OB22 start-up program processing
(power recovery)
- OB31 cycle trigger
- OB34 battery failure
- OB251 PID control algorithm
Integral Function Blocks
- FB240 code converter: BCD4 to 16-bit
fixed point
- FB241 code converter: 16-bit fixed point
to BCD4
- FB242 multiplier: 16-bit fixed point
- FB243 divider: 16-bit fixed point
- FB250 reading in analog values
- FB251 outputting analog values
- FB252 L2-SEND
- FB253 L2-RECEIVE
S5-95U, SINEC L2
EWA 4NEB 812 6112-02