Help~This error comes up after I download my program.
- Thread starter S7PP
- Start date
KalleOlsen
Member
Try to remove OB8x and OB12x letting the CPU stop. Then the 'Open Block' button is clickable and you can find the cause.
Kalle
Kalle
Thanks, I found the problem. The reason is I used a variable to open a DB indirectly like this:
OPN DB [#AlarmDB]
on the top of a FB. However, I have to repeat it more times in between of the program, otherwise, the program will create errors if I use DBWxxx . Seems like it doesn't know which DB it belongs to.
Have you experienced that?
OPN DB [#AlarmDB]
on the top of a FB. However, I have to repeat it more times in between of the program, otherwise, the program will create errors if I use DBWxxx . Seems like it doesn't know which DB it belongs to.
Have you experienced that?
L D[AR2P#0.0]
Lifetime Supporting Member
Are you accessing any other global db variables ?
After
OPN DB [#AlarmDB]
the global DB open is specified by AlarmDB
If you now have some processing as follows
A DB1.DBX0.0
= M0.0
The global DB open is now DB1
After
OPN DB [#AlarmDB]
the global DB open is specified by AlarmDB
If you now have some processing as follows
A DB1.DBX0.0
= M0.0
The global DB open is now DB1
No, I don't have any other global DB opened in the same FB.
If there is a Network that doesn't contain any data fron the DB[#AlarmDB], before the next Network with DBXxxx, I have to do "OPN DB [#AlarmDB] again, otherwise, it won't work.
If there is a Network that doesn't contain any data fron the DB[#AlarmDB], before the next Network with DBXxxx, I have to do "OPN DB [#AlarmDB] again, otherwise, it won't work.
L D[AR2P#0.0]
Lifetime Supporting Member
Post your code.
Here's an example showing the global DB changing from 200 to 5
Here's an example showing the global DB changing from 200 to 5
Last edited:
L D[AR2P#0.0]
Lifetime Supporting Member
No. Look at the column heading - you are displaying the accumulator (standard). Right click in the RH pane and you can make the DB1 resgister visible.
L D[AR2P#0.0]
Lifetime Supporting Member
15:00
Actually, I have more questions, I don't know how to ask. I already struggled for a long time.
I have an FC to create a "one shot" signal every time the input change the status. It works fine if I call it in OB1. However, if I call it an an FB, it doesn't work, it works but the "one shot" signal doesn't show in the FB. I don't know why.
I have an FC to create a "one shot" signal every time the input change the status. It works fine if I call it in OB1. However, if I call it an an FB, it doesn't work, it works but the "one shot" signal doesn't show in the FB. I don't know why.
L D[AR2P#0.0]
Lifetime Supporting Member
You are probably using a temp variable to store the rising edge status in the FC- temps are not remembered between calls.(although it can happen depending on what other blocks are called and what they do to their allocated temp data).
When you have a problem post your code.
When you have a problem post your code.
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