Display and control panel AMS 338i
Leuze electronic GmbH + Co. KG
AMS 338
i
47
TNT
35/7-2
4V
the Eeprom and the associated ESC register via the master (typically TwinCAT). In this case,
too, the SSA is persistently stored in the AMS 338
i
. The master (TwinCAT) can determine
whether it wants to use the EtherCAT address (auto-increment address) or the SSA to
address the AMS. For SSA, the position-dependent EtherCAT address is also set to the value
of the SSA. Otherwise, the auto-increment address is entered into the ESC register which
contains the EtherCAT address. The EtherCAT address is not stored in persistence memory,
but written into the respective register by the master when the status changes from INIT to
PREOP.
Position value submenu
Note!
All parameters mentioned must be entered via startup parameters of the control software
(TwinCAT). If parameters from the position value submenu are changed via the display, these
are overwritten via the startup sequence created in the control with the values stored there.
Table 8.3:
Position value submenu
Level 3
Level 4
Level 5
Selection/configuration option
Description
Standard
Unit
Metric/Inch
Specifies the units of the measured distances
Metric
Counting
direction
Positive/Negative
Positive: The measurement value begins at 0 and increases
with increasing distance.
Negative: The measurement value begins at 0 and decreases
with increasing distance. Negative distance values may need
to be compensated with an offset or preset.
Positive
Offset
Output value = measurement value + offset
The resolution of the offset value is independent of the
selected "Position resolution" and is entered in mm or inch/
100. The offset value is effective immediately after entry. If the
preset value is activated, this has priority over the offset. Pre
-
set and offset are not offset against each other.
0 mm
Preset
The preset value is accepted by means of teach pulse. The
teach pulse can be applied to a hardware input of the M12
PWR connector. The hardware input must be appropriately
configured. See also configuration of the I/Os.
0 mm
Free resolu
-
tion
value
The measurement value can be resolved in increments of 1/
1000 within the 5 … 50000 value range. If e.g. a resolution of
0.875mm per digit is required, the parameter is set to 875.
1000
Error delay
ON/OFF
Specifies whether, in the event of an error, the position value
immediately outputs the value of the "Position value in the
case of failure" parameter or the last valid position value for
the configured error delay time.
ON/100
ms
Position value
in the case of
failure
Last valid value / zero
Specifies which position value is output after the error delay
time elapses.
Zero
