Siemens SIMATIC FM 353 - Page 121

Programming the Technological Functions
6-41
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
6.4.4 The POS_DIAG (FC 2) block − Read diagnostic interrupt data
Block description
See Section 6.3.4.
6.4.5 The POS_MSRM (FC 3) block − Read measured values
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.
Call in LAD representation
(ladder diagram)
Call in STL representation
(statement list)
EN ENO
POS_MSRM
IN_MSR
DB_NO RETVAL
IMSRM
CALL POS_MSRM, IMSRM
DB_NO :=
RETVAL :=
IN_MSR :=