Unable to convert HEX word to bits *Modicon Quantum*

[Ilya]

Hi!
I've got a problem.
There is a direct link method of communication between 2 Quantum PLCs.
PLC1 HEX word to PLC2 - OK, i.e. converting from word to bits in PLC2 is do right.
PLC2 HEX word to PLC1 - NOT OK,i.e. converting from word to bits in PLC1 is do wrong. Let me explain. There is a HEX word (for example 16#0002) on the input of the *WORD TO BIT* block, but there are NO active outputs of the block.
The configuration of *peer cop* of the both PLCs is equal.
Would you please tell me how can I solve this problem.

Thanks in advance.

Ilya Ragazinsky.

 

[Contr_Conn]

It is very hard to guess without actual program. What exact instruction used?
Try to copy source word to empty 4xxxxx and do it again,
Try to use a different destination.

Most likely your destiation or source overwritten by some data over instruction you can't see: some instructions used more than one register and search can't find this. What software used?

Check your PM

Alex

 

[Ilya]

Thank you for reply, Contr_Conn.

I was trying to copy source word to empty 4xxxxx, also I was trying to use a different destination, but it doesn't work.

Please, check the attached screensavers.

What is PM I have to check?

PLC - CPU 534-14
Software - Concept 2.5 XL SR2

Ilya

 

[Jim Dungar]

In your example, the input to the WORD_TO_BIT command is a literal value (of 2 Hex) not a writable memory word, so the only output will be BIT 1.

If your first PLC is transmitting a HEX value into a memory word (such as 4xxx2) in the second PLC, no conversion is necessary to decode the bit pattern.