Siemens S7-400PLC Specifikace Strana 70

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Differences between FB10 / FB20
70 01.00|FB20|en
Differences between FB10 / FB20
In this chapter, the wiring of the FB10, the predecessor module for
controlling the drive modules, is compared to the current FB20.
The result is an overview of the similarities of the FBs as well as a
presentation of the latest developments on the FB20. With this in-
formation, the change from the FB10 to the FB20 can be made
quickly.
FB switching: input + in/output
FB10/20 switching: input + in/output
FB10 FB20 Remark
I_ADDR pi_fu_adr_in
The specification of the module address
is now done via a pointer. This has the
following advantages:
- The I/O addresses can differ.
- Entry in the cross-reference list.
- Higher flexibility, because the entire
address range of the CPU can be used.
pi_fu_adr_out
--- db_sys_sd
This DB contains additional signals/data
that can be used for the user and the
service.
I_FL_CYCLE_BYTE --- The flashing indicators are no longer
needed.
--- bii_1_bwg_pf This signal specifies whether or not a
motion can be started only by a posi-
tive edge signal after the drive has been
stopped (e.g., due to a malfunction or a
stop function). This signal has an influ-
ence on the following signals:
- bii_1_tip_neg
- bii_1_tip_pos
- bii_1_mot_fkt_asf
- bii_1_vfs_prio
I_ACK bii_1_reset Acknowledgment of a malfunction or
reset of internal FB signals/data.
I_RESEND_CMD --- It is no longer used to prevent an inde-
pendent/unexpected start.
5
5.1
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