Search talk: Object reference not set to an instance of an object

 
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Need help to figure out Running an AC motor with modbus RTU CODESYS Forge talk (Thread)
Need help to figure out Running an AC motor with modbus RTU
Last updated: 2021-02-03

Convert and String to an expression read by the runtime CODESYS Forge talk (Thread)
Convert and String to an expression read by the runtime
Last updated: 2012-01-09

Can't add 0.0x to an real variable with no larger than 1048576 ????? CODESYS Forge talk (Thread)
Can't add 0.0x to an real variable with no larger than 1048576 ?????
Last updated: 2018-10-08

Send RESTful commands to an external non CODESYS device server and HTML Script editing CODESYS Forge talk (Thread)
Send RESTful commands to an external non CODESYS device server and HTML Script editing
Last updated: 2021-06-10

How to enter both boxes *and* jumps inline in an LD? CODESYS Forge talk (Thread)
How to enter both boxes and jumps inline in an LD?
Last updated: 2010-06-17

Passing an I/O Array to a Function or Function Block CODESYS Forge talk (Thread)
Passing an I/O Array to a Function or Function Block
Last updated: 2015-05-07

How to Ping an IP address in Automation Builder 2.2/CoDeSys CODESYS Forge talk (Thread)
How to Ping an IP address in Automation Builder 2.2/CoDeSys
Last updated: 2022-04-21

Eliminate an expired demo licese to use a valid full one. CODESYS Forge talk (Thread)
Eliminate an expired demo licese to use a valid full one.
Last updated: 2015-10-28

How do I convert an INT variable to a TIME variable? CODESYS Forge talk (Thread)
How do I convert an INT variable to a TIME variable?
Last updated: 2011-03-30

Visualization - writing to an array using a variable for the index CODESYS Forge talk (Thread)
Visualization - writing to an array using a variable for the index
Last updated: 2019-01-18

Cant assign a remote device as an input to a function block CODESYS Forge talk (Thread)
Cant assign a remote device as an input to a function block
Last updated: 2023-03-23

how to create an external C library targetting on xc167? CODESYS Forge talk (Thread)
how to create an external C library targetting on xc167?
Last updated: 2009-12-08

How to make my own library / edit an existing one? CODESYS Forge talk (Thread)
How to make my own library / edit an existing one?
Last updated: 2010-11-24

Example: How to create an IEC Unit Test FB via Python script CODESYS Forge talk (Thread)
Example: How to create an IEC Unit Test FB via Python script
Last updated: 2013-10-30

Post by davidbo on What does CODESYS expect to do when I get such an error message CODESYS Forge talk (Post)
What does CODESYS expect me to do when I get such an error message:
Last updated: 2024-01-08

What does CODESYS expect to do when I get such an error message CODESYS Forge talk (Thread)
What does CODESYS expect to do when I get such an error message
Last updated: 2024-01-08

How to use TON inside an FB that is instanced within a Visu page CODESYS Forge talk (Thread)
How to use TON inside an FB that is instanced within a Visu page
Last updated: 2024-04-15

How to use TON inside an FB that is instanced within a Visu page CODESYS Forge talk (Thread)
How to use TON inside an FB that is instanced within a Visu page
Last updated: 2024-04-15

Post by pazderai on CanOpen write issue CODESYS Forge talk (Post)
Thank you for an answer. Unfortunatelly, it doesn't work. The slave needs command byte as follows 0x22. It means expedited transfer where s-bit is not set, therefore data length is not specified. If I use segmented mode by CiA405.SDO_WRITE_DATA it produce command byte as follows 0x21 which is unfortunately supported by the slave and it returns with error 0x05040001 - SDO Abort Code -Client/server command specifier not valid or unknown. I can use CAN API low level to overcome this problem where it is possible to set 0x22 as a command byte, but than I can use user interface to set the communication probably, because I thing that machine expert uses library CiA405.SDO_WRITE for setting the slave. Or am I wrong?
Last updated: 2024-07-16

Post by apurv on Cannot pass array of constant size to a function as a reference CODESYS Forge talk (Post)
I have a Array of constant size defined like this Var Constant MAX_SIZE :UINT := 10; End_var VAR array : ARRAY[0..MAX_SIZE] OF INT; END_VAR Now I want to pass this array to a function by reference, Function fun : INT VAR_IN_OUT CONSTANT MAX_SIZE : UINT; END_VAR VAR_INPUT array : REFERENCE TO ARRAY[0..MAX_SIZE] OF INT; END_VAR but when I run this it gives strange Errors Error : Cannot Convert type 'ARRAY [0..MAX_SIZE] OF INT' to type 'ARRAY[0..MAX_SIZE] OF INT'
Last updated: 2024-01-07

Post by fransh on WAGO PFC200 FW25 unable to connect CODESYS Forge talk (Post)
Hi I set up my WAGO PFC200 controller and am unable to connect to the processor. Gateway is set to local host. I can connect to the unit with the WAGO Web Based management but not with Codesys V3.5 SP18.5. Any suggestion?
Last updated: 2023-12-09

Instance Problems with wide visualizations CODESYS Forge talk (Thread)
Instance Problems with wide visualizations
Last updated: 2005-10-20

Instance v's Implementation & breakpoints CODESYS Forge talk (Thread)
Instance v's Implementation & breakpoints
Last updated: 2005-04-04

Exporting FB instance parameters in PLCopenXML CODESYS Forge talk (Thread)
Exporting FB instance parameters in PLCopenXML
Last updated: 2016-08-01

{attribute 'instance-path'} crashs in 3.5.16.0 CODESYS Forge talk (Thread)
{attribute 'instance-path'} crashs in 3.5.16.0
Last updated: 2020-05-13

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