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Functions
7100.006434_Bus description_PSD4xx_IO_J_ENG
55
2022-09-13
3.11.
Changeover of parameter set
(Available from firmware V19
for variants with the feature “software modules” = “S” or “Z”)
Some parameters that have an influence on the execution of a positioning run are stored in the
device in four instances. The associated ISDUs have 4 sub-indices, resulting in a total of four run
sets. Values with the same sub-
index are thus combined in a “parameter set”.
The desired run set is selected using bits 8 and 9 of the command byte:
-
Bits 9..8 = 0x00
Run set 1 (Sub-index 1)
-
Bits 9..8 = 0x01
Run set 2 (Sub-index 2)
-
Bits 9..8 = 0x02
Run set 3 (Sub-index 3)
-
Bits 9..8 = 0x03
Run set 4 (Sub-index 4)
The following parameters are included in the changeover of parameter set feature, i.e. switching
the run set causes the values from the corresponding sub-index to be applied immediately (i.e.
either during a current positioning run or, at the latest, during the next positioning run) for the
following ISDUs:
- ISDU 123: Positioning window
- ISDU 137: Target speed for positioning runs
- ISDU 138: Target speed for manual runs
- ISDU 139: Acceleration 1
- ISDU 141: Deceleration 1
- ISDU 143: Speed limit for run abort
- ISDU 147: Max. start-up current *)
- ISDU 148: Max. operating current
- ISDU 149: Max. holding current at end of run
- ISDU 150: Max. holding current
- ISDU 154: Time elapsed until speed falls below speed limit for run abort
- ISDU 155: Time period for start-up current *)
- ISDU 157: Duration of max. holding current at end of run
The run set can also be changed while a positioning run is in progress, e.g. the target speed or
operating current can be adjusted to new conditions without having to execute an ISDU request
(e.g. in the event of a load change). Usually, the run sets are stored once in the EEPROM of the
device or transferred to the device when communication is established before the first run
command.
If the parameter set is changed during an ongoing positioning run, changes to the parameters
marked with *) only become effective during the next positioning run. Changes to all other
parameters are already effective during the ongoing positioning run.
Note:
In the case of variants without the changeover of parameter set feature (i.e.
variants with the feature “Software modules” = “1”, “M” or “P”), bits 9..8 have no function
and are ignored by the device.