[PLC V1040. The screen virtual keyboard image was lost.]

Thank you, it helped

[PLC V1040. The screen virtual keyboard image was lost.]

Unitronics V1040. The screen virtual keyboard image was lost. Instead of virtual buttons, stripes are displayed on the screen. I reloaded the new operating system to the PLC, but it did not help. How I can fix this?

[FB Procotol Scan command error]

I use the Protocol Scan command to read the ASCII character string 0D 0A 31 32 20 20 20 31 30 31 2E 33 32 6B 50 61 61 0D 0A -  "/ n / r12 101.32kPaa / n / r"  from the receive buffer.  The number of bytes of the pressure value kPaa is not constant, it can be from 3 to 6 bytes. Therefore, when configuring a command, I use "Decimal, no fixed length".  After scanning, the command returns the Index of the received message -1.  If in this case I use the "Decimal, fixed length"  (6 bytes) the command returns the result 0  "OK",  and the number of bytes received   19.

What is the reason that the message considers as invalid?