Parameter
structure
Keypad and
display
Parameter x.00
Parameter
description format
Advanced parameter
descriptions
Serial comms
protocol
Electronic
nameplate
Performance
Menu 17
Digitax ST Advanced User Guide 187
Issue Number: 1 www.controltechniques.com
When set it enables the DPL program watchdog function. The DPL WDOG command must then be executed every 200ms. This can be used to
protect the program against malfunction. If the command is not executed within a 200ms time period the drive will trip on SL3.tO. Please note that the
WDOG command must also be executed once for the watchdog to be enabled. This is normally executed at the end of the Initial task.
Setting this parameter to 1 will initiate an immediate save of all non-volatile Motion Processor data. This consists of the P/Q/T/U PLC register sets and
optionally menu 20 (depending upon the setting of Pr 81.21).
Note that this will also cause a reset of the Motion Processor and this parameter will return back to zero automatically. Also if the drive is tripped, it will
be reset. Menu 17 will not be saved.
Setting this parameter to 1 signals that all non-volatile data of the Motion Processor will be automatically saved upon an under voltage (UV) trip of the
drive.
Note that when a ‘UV’ save occurs the Motion Processor will be reset.
If set to 1, menu 20 will be saved/restored along with other non-volatile parameters upon a save request (Pr 17.19=1) or under voltage save
(Pr 17.20=1). If menu 20 is to be restored on power-up the user must ensure that this parameter is saved in the drive before powering down.
Since menu 20 is a global drive menu, only one option installed to the drive should be used to store and restore menu 20, therefore if more than one
Motion Processor is installed to the drive only one should have this parameter set otherwise menu 20 will not be restored correctly on power-up.
Unlike other setup parameters, parameters Pr 17.20 and Pr 17.21 are not cached, which means a change to the parameter takes immediate effect.
17.18 Watchdog enable
Digitax ST Variant Indexer, Plus
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range OFF (0) or On (1)
Default OFF (0)
Update rate 4ms write
17.19 Save request
Digitax ST Variant Indexer, Plus
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range OFF (0) or On (1)
Default OFF (0)
Update rate 4ms write
17.20 Enable under voltage save
Digitax ST Variant Indexer, Plus
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range OFF (0) or On (1)
Default OFF (0)
Update rate 4ms write
17.21 Enable menu 20 save and restore
Digitax ST Variant Indexer, Plus
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range OFF (0) or On (1)
Default OFF (0)
Update rate 4ms write
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