1-4
Programming Your Application
690+ Series Frequency Inverter
Programming Rules
The following rules apply when programming:
Parameterisation Mode
•
Function block output parameter values cannot be changed (because they are a result of the
function block’s processing)
•
Function block input parameter values that receive their values from a link cannot be
changed (as they will change back to the value they receive from the link when the Inverter
is running).
Configuration Mode
•
A link’s DESTINATION must be set to an input
parameter (only one link per input parameter).
•
A link’s SOURCE may be set to any parameter.
Both input and output parameters can be used as
a source.
•
Disable a link by setting both DESTINATION
and SOURCE to NULL.
•
Setting a link’s SOURCE to be a
feedback link
forces the link to be executed first. This is used
to reduce execution timing delays in a feedback
loop situation. A feedback link is indicated by
“
Å
“ appearing to the right of the source parameter’s name.
Execution Rules
The complete block diagram is executed every 5ms, with individual control blocks executing
within 1ms. Just before a function block is executed, all the links that have that block as their
destination are executed, thereby copying new values in to the block’s parameter inputs. The
input parameters are then processed to produce a new set of output parameters. The execution
order of the blocks is automatically arranged for minimal delay.
•
The output value transferred by a link on execution is clamped to be between the maximum
and minimum value for its destination input parameter.
•
If a links’ SOURCE and DESTINATION parameters have different decimal point
positions, there is no automatic adjustment. Use a VALUE FUNCTION block to modify the
input into the correct destination format. Refer to the table below for the result of linking
different parameters types.
Source Value
(the input)
Source Type
Destination
Type
Destination Value
(the result)
TRUE Boolean
Real
0.01
FALSE Boolean
Real
0.00
≥
0.005 Real
Boolean
TRUE
≤
0.005 Real
Boolean
FALSE
LOCAL ONLY (1)
Enumerated
Real
1.00
2.00
Real
Enumerated
REMOTE ONLY (2) (Note that (2) will not
always return Remote Only)
Table 1-1 Execution Rules
Saving Your Modifications
If parameter values or links have been modified or a macro has been loaded, the new settings
must be saved. The Inverter will then retain the new settings during power-down. Refer to the
Installation Product Manual, Chapter 5: “The Operator Station” - Saving/Restoring/Deleting
Your Application.
Feedback Link
BLOCK
BLOCK
BLOCK