Siemens SIMATIC FM 353 Manual page 121

6.4.4 The POS
Block description
See Section 6.3.4.
6.4.5 The POS
Function
Use the POS_MSRM block to read the measured values into the AW-DB user data
block.
For information on process interrupts, please see Section 6.5.
For information on measured values, see Section 9.3.10.
Note
The measured values can also be read by means of POS_CTRL (Read request).
If more than one Read request is present, this request is processed in the relevant
order.
If the POS_MSRM block is called, the measured values are obtained irrespective
of any other Read requests currently present.
Call options
The POS_MSRM block requires an instance DB when called.
The DB IMSRM (DB 3) is part of the "FM353_354" library.
POS_MSRM can be called in OB 40 (only when the FM is operated in the central
configuration) if the process interrupt has been activated (see Section 5.2), or in
OB 1. It is not possible to call POS_MSRM in both OBs simultaneously.
EN
DB_NO
IN_MSR
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
DIAG (FC 2) block − Read diagnostic interrupt data
_
MSRM (FC 3) block − Read measured values
_
Call in LAD representation
(ladder diagram)
IMSRM
POS_MSRM
ENO
RETVAL
Programming the Technological Functions
Call in STL representation
(statement list)
CALL POS_MSRM, IMSRM
DB_NO
RETVAL
IN_MSR
:=
:=
:=
6-41