Invoke Fb8 P_Snd_Rk From Ob1 - Siemens SIMATIC S7 CP340 Programming Manual

4 ASCII protocol communication
Fig. 27: Send Data block DB1
3. Invoke Send Function block
The parameters of the send function block FB8 P_SND_RK of CP341 are set as in
the table below:
LADDR
DB_NO
DBB_NO
LEN
REQ
R
DONE
ERROR
STATUS
Other
parameters
Table 5: Parameter definition of FB8 P_SND_RK
Fig. 28: Invoke FB8 P_SND_RK from OB1
CP340/CP341/CP440/CP441 Communication and Programming
Entry-ID: 88867653, V1.0,
Start logic address in hardware configuration, which is 256 in this example
Send Data block number, which is 1(DB1) in this example
Start address of Send Data, which is 0(DB1.DBB0) in this example
Length of send data, which is 10 in this example
trigger bit of Send Data, rising edge trigger, which is M0.0 in this example
Cancel communication
send complete bit, which is TRUE if Send completes and has no error
error bit, TRUE indicating that it has an error
status word, ID error code. See CP341 manual for related descriptions
Irrelevant to ASCII communication protocol, and not available in this
example
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