Siemens SIMATIC S7-300 Manual page 82

Programming the FM 354
Prerequisites The following prerequisites must be fulfilled in order to control the FM 354
from your user program:
Creating the user Proceed as follows:
DB
1. Generate a data block in STEP 7 (DB 1).
2. Open DB 1 and select the property "with assigned user-specific data
3. Click UDT 1
4. Load this user DB and save it in the CPU.
5. You can use "Parameterize FM 354" to fill the user DB in the CPU with
You must create a user DB for each channel.
Function blocks The following table gives you a general view of the function-block package
(FCs) for the FM 354.
Table 6-1
FC 1
FC 2
FC 3
FC 4
FC 5
FC 6
Note
You can change the FC number for your project. The number is changed in
the SIMATIC Manager by renaming the FC in your project with a free num-
ber. These changes should be entered in the symbol table at the same time.
6-2
You have installed the software on your programming device/PC, as de-
scribed in Section 5.1.
The link between the programming device/PC and the S7-300 CPU must
already be set up (see Figure 4-1).
type".
Result: UDT 1 (user–defined data type)
is offered
Result: You have created the user DB (DB 1).
data.
Technology functions for the FM 354
Function Function
Block No. Block Name
INIT_DB
MODE_WR
RD_COM
DIAG_RD
MSRMENT
DIAG_INF
Significance
Initialize user DB
Control operating modes and process write jobs
Process read jobs cyclically
Read diagnostic interrupt data in OB 82
Read measured values
Read diagnostic interrupt data in OB 1
FM 354 Servo Drive Positioning Module