Siemens SIMATIC FM 353, Manual

Page: 229 / 361

Description of Functions
9-29
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Handling by the user
The table below gives you an overview of how to handle this mode.
Triggering of movement Type of movement
Start
as defined by “MDI block”
(user DB, DBX38.3)
“MDI block on-the-fly” transmitted
to the FM 353
as defined by “MDI block on-the-fly”
(user DB, DBX38.4)
Note
Please see also Section 9.1.3!
Control actions
Prerequisites:
S
The FM 353 has been initialized.
S The mode has been selected and acknowledged.
S Drive Enable [AF] is = 1 (control signal in user DB, DBX15.7)
S Stop [STP] is = 0 (control signal in user DB, DBX15.1)
S Servo Enable (RF) is = 1 (user DB, DBX34.0)
S Axis is synchronized.
Table 9-7 Control actions for “MDI” mode (examples)
Signal name Level Explanation
Control action 1, define position
Transfer MDI block
(DBX38.3)
Control signal:
Start [ST]
Checkback signals:
e.g. Travel plus [FR+]
Start enable [SFG]
Processing in progr. [BL]
e.g. Travel plus [FR+]
Processing in progr. [BL]
Position reached, stop
[PEH]
When the MDI block has been transferred, [ST] can be
initiated.
The axis cancels the [SFG] and outputs messages
[BL] and [FR+]
When the defined position has been reached, the axis
enables [PEH]; [SFG] and checkback signals [FR+]
and [BL] are reset.