Experimental Physics and
Industrial Control System
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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | RE: Get/Set Local Variable in motorAxis From sub Record |
| From: | Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> |
| To: | 'William Cork' <wcork at lbl.gov> |
| Cc: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
| Date: | Wed, 8 Jul 2020 14:35:32 +0000 |
|
Hi Will, I think my approach in this case would probably be an SNL program.
-
Add a bo record to disable the motor and set the motor record SDIS field to point to that record -
SNL program reads from the VAL fields of the other records and writes 1 to the disable record I don’t know if this actually prevents the motor from moving in all cases but I just did a simple test and it worked. I issued the following commands: # Set the SDIS field to be a bo record caput 13IDD:m15.SDIS 13IDD:Unidig1Bi15 # Set the bo record to 0. I tested that I could move the motor. caput 13IDD:Unidig1Bi15 0 # Set the bo record to 1. I tested that I could not move the motor by typing into either the VAL field or pushing the tweak buttons. caput 13IDD:Unidig1Bi15 1 Note that if the logic is simple enough you may be able to do it in a calcout record, rather than an asub or SNL. If this is an “interlock” with serious consequences if it does not work then I would suggest a PLC solution and not software! Mark From: Tech-talk <tech-talk-bounces at aps.anl.gov>
On Behalf Of William Cork via Tech-talk Hi All, I'm trying to find the best solution to interlock motion from multiple other records. My current thinking is to link the VALs of these records to a sub record and have the C function modify a variable within the motor driver. The issue I have is that I cannot find a way to link the instance of the drive I would like to have access to in the sub record process function. Is there a way to pass a reference of a controller instance to a subroutine process function? Is there a simpler solution to this? Could the result of the sub record be linked to a field in the motor record to prevent motion? Thank you, Will |
- Replies:
- Re: Get/Set Local Variable in motorAxis From sub Record William Cork via Tech-talk
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- Get/Set Local Variable in motorAxis From sub Record William Cork via Tech-talk
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