Specifications

Appendix A: Troubleshooting Updating Project Versions
VisiLogic: Getting Started 113
V120
-
12
continues to support the older PID function, continues to support
up to 18 PID loops, but does not support the PID FB.
Set PLC Name function
Set PLC Name was
not
required in
TCP/IP applications.
Set PLC Name
is
required in TCP/IP
applications.
Version 4.00, Build 10
Read
\
Write Column Data Tables function
The function was not FIFO
-
based.
For example, assume the Data
Table has 10 rows. If the Read
Column function is pointing at Row
Number 3, and the Number of
Rows to be read is 10, the
function would read only 7 rows of
data.
The function is now FIFO
-
based. If
the Data Table has 10 rows, and the
Read Column function is pointing at
Row Number 3, and the Number of
Rows to be read is 10, the function
will read the last 7 rows of data, and
also automatically read the top three
rows, for a total of 10 rows of data.
Version 4.00, Build 15
Display String function
Any change in the status of the
refresh bit could trigger Display
String.
Only the rising edge of the
refresh
bit can trigger Display String.
Version 4.00, Build 22
MODBUS slave addressing
As of this version, the Slave addressing scheme for Timer / Counter, Current
and Preset, was changed.
Version 4.00, Build 23
SB 250 Keypad entry within limits, SB
251 Keypad entry exceeds limits
These SBs would turn ON, and
remain ON. They would turn OFF
only after the display was fully
loaded.
These SBs now turn OFF either
when:
• The current Display is either re-
called or changed,
or
• At the beginning of the next
program cycle.
Touch
-
screen PLCs: Touch elements
Bits related to touch
-
screen
elements were not reset at
power-up.
Bits related to touch
-
screen
elements are now reset at power-
up.
Version 4.50
When:
-a project containing graphics
was originally written using a
VisiLogic version lower than 4.00,
-and then saved using a version
between V4.0X -V4.50,
-and then reopened in VisiLogic
4.50 or higher,
certain images may not display
correctly. Such images may have
to be reinserted in order to ensure