Table of Contents
Advertisement
Compatibility with the previous product
7.3 Compatibility in the user program in DP mode
Topic / relates to
11.
Deterministic sending / receipt
of data - coordination between
CPU and CP/PROFIBUS
12.
Jobs with DP_SEND and
DP_RECV
1)
13.
Receive buffer length to short
for AG_RECV
14.
Responder functionality of the
DP master (class 1;
DP master (class 2) passes
jobs to DP master (class 1))
Functions:
"DDLM_GET_Master_Diag
"
"DDLM_Act_Param"
See also the STEP 7 online help on the SIMATIC NET program blocks for PROFIBUS DP.
1)
40
Response of the device types
CP 342-5 6GK7 342-5DA00-0XE0
CP 342-5 6GK7 342-5DA01-0XE0
In cyclic DP mode, the job
confirmation on the program block
interface includes the confirmation
of the transfer to PROFIBUS.
DP slave mode:
To start job processing, the
program blocks DP_SEND and
DP_RECV must be activated at
least once.
DP master mode:
To start received data processing,
the program block DP_RECV must
be activated at least once.
If the receive buffer is too small,
data is received until the buffer size
is reached.
The call is acknowledged with error
code 8185
.
H
- supported by DP master as
responder -
New response of the device types
CP 342-5 6GK7 342-5DA02-0XE0
CP 342-5 6GK7 342-5DF00-0XE0
CP 342-5 6GK7 342-5DA03-0XE0
In cyclic DP mode, the processing cycle on
the CPU is separate from the processing
cycle on the CP.
Send data: The confirmation of the job
includes no confirmation of the successful
transfer to PROFIBUS.
Receive data: It is possible that the same
data was received several times.
Depending on the use, it is adequate to
activate program block DP_SEND or
DP_RECV to activate job processing.
In DP master mode, at least of the two
program blocks must be activated at least
once.
If the receive buffer is too small, no data is
received.
The call is acknowledged with error code
80B1
.
H
- DP master without responder functionality -
Manual, 10/2011, C79000-G8976-C146-09
CP 342-5 / CP 342-5 FO
Advertisement
Table of Contents
