Programming the Technological Functions
6-31
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Call options
The POS_CTRL block requires an instance data block (DB) when called. The DB
IFFM_ICTRL (DB1) is part of the “FM353_354” library and at the same time inclu-
des the user interface. For more information, please refer to Section 6.4.6.
You must call the POS_CTRL block cyclically (e.g. once in the OB 1 cycle). Before
you call the function, enter all data/signals in the user DB (AW-DB) which are re-
quired to execute the intended functions.
Call in LAD representation
(ladder diagram)
Call in STL representation
(statement list)
EN ENO
POS_CTRL
IFFM_ICTRL
CALL POS_CTRL, IFFM_ICTRL
Parameters
The POS_CTRL block possesses neither input, nor output parameters.
Return values
The POS_CTRL block delivers the following return values in the RETVAL instance
variable:
RET_VAL BR Description
1 1 At least 1 job/transfer in progress
0 1 No job/transfer in progress, no error
< 0 0 Error:
S Data error (AW-DB, DBX22.4)
S Communication error (AW-DB, DBW66)
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