Performance Data
B2–11
CP 343-5 for PROFIBUS / Manual Part B2
Release 11/2002
C79000-G8976-C160-02
4.3
Characteristics of S5-compatible Communication
(SEND/RECEIVE Interface) on FDL Connections
The following information is important for operating FDL connections (specified,
free layer 2 (SDA and SDN), broadcast, multicast):
Table 4-3
Characteristics:
Explanation / Values
Total number of FDL connections that can be
operated
Maximum of 16
Size of the transferable data area on FDL
connections
1–240 bytes maximum per specified FDL
connection (for sending and receiving)
Free layer 2, broadcast and multicast:
1 to 236 bytes of user data can be transferred
per job. The job header requires an additional 4
bytes.
Reaction Times for FDL Connections
The reaction times for FDL connections are largely dependent on the time required
to execute the function blocks (AG-SEND, AG-RECV) on the S7-300 / C7–300
CPU.
Table 4-4
Component
Explanation / Values
Run time on the CPU 314-1
(6ES7 314-1AE04-0AB0)
per AG_SEND block call:
S
6.0 ms with 240 bytes
per block call AG_RECV:
S
7.5 ms with 240 bytes
