Siemens SIMATIC FM 353 Manual page 105

6.3.5 The POS
Function
Use the POS_MSRM block to read the measured values from the AW-DB user
data block.
For information on process interrupts, please see Section 6.5.
For information on measured values 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 pending, this request will be 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
POS_MSRM can be called in OB 40 (only when FM is used centralized) if the pro-
cess interrupt was triggered (see Section 5.2), or in OB 1. POS_MSRM must not
be called in both OBs at the same time.
EN
DB_NO
IN_MSR
Parameters
The Table below lists the parameters for the POS_MSRM block.
Name
DB_NO
RET_VAL INT
IN_MSR
Parameter types: I = input parameter, Q = output parameter,
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
MSRM (FC 3) block − Read measured values
_
Call in LAD representation
(ladder diagram)
POS_MSRM
ENO
RET_VAL
Data Param.
type type
INT I Data block number
Q −1
BOOL I/Q Start Read
I/Q = throughput parameter (initiation parameter)
Programming the Technological Functions
Call in STL representation
(statement list)
CALL POS_MSRM
DB_NO
RET_VAL
IN_MSR
Description
:=
:=
:=
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