Programming the Technological Functions
6-9
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
6.3.1 Overview of the “FMSTSV_L” function block library
You can use the blocks of the “FMSTSV_L” block library as follows:
S Central configuration of the FM
S Distributed configuration of the FM via PROFIBUS DP
The table below provides an overview of the functions (FC), data blocks (DB) and
organization blocks (OB) required for communication and control of the FM 353.
Table 6-1 Standard function blocks of the “FMSTSV_L” library (overview)
Block
Block Name Description/Function Remarks
FC 0
Page 6-10
POS_INIT Call in OB 100 and OB 83, start-up/initializa-
tion
Required for application,
no. can be changed
1)
FC 1
Page 6-12
POS_CTRL Call in OB 1, cyclic operation (synchroniza-
tion with FM 353)
Basic functions and operating modes, inter-
face processing, read and write requests
FC 2
Page 6-22
POS_DIAG Call in OB 82, internal errors, external er-
rors, and external channel errors of the FM
FC 3
Page 6-25
POS_MSRM Call in OB 40 or OB 1,
reading out of the measured values
To be used only if the
function in question is re-
quired for the application in
question; the number can
be changed
1)
DB (UDT) AW-DB Interface to the FM Required for application
OB 1 − Cyclic level Required for application
OB 82 − Diagnostic interrupt level
OB 100 − Start-up level
OB 86 − Rack failure For distributed configura-
OB 122 − I/O access error
tions
1) − The block number is a default setting, block number can be changed in the SIMATIC Manager
− Symbol table entries can be changed in conjunction with symbolic programming only
Note
The symbolic block identifier is used from here on.
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