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F977
My Function Selection
Program My Function
This parameter Enables/Disables the configured My Function feature of the
P9 ASD.
Settings:
0 — None (Disabled)
1 — My Function with Terminal Board Signal (discrete terminal activation)
2 — My Function Always On
My Function
The My Function feature is configured using the settings of
is used to enhance the programmability of the P9 ASD by performing two
programmable functions: 1) the Combined Terminal Function, and 2) Logic
Operations.
Combined Terminal Function
Assigning more than one function to a discrete output terminal provides two
advantages: it effectively expands the number of input terminals, and it reduces
the number of cables required to support the input/output functions (e.g.,
assigning ST and F to one terminal). Using Virtual Terminals 1 – 4
F976) is required to use this function.
In the example below, the ST terminal assignment and the F terminal
assignment will be combined as one terminal to illustrate this feature. However,
any two of the discrete output terminal assignments listed in
may be combined in this manner.
Setup (Example)
1.
Disable the My Function parameter at
starting upon completion of the setup.
2.
Assign the ST function to the S1 terminal (F115).
3.
Assign the F function to Virtual Input Terminal 1 (F973).
4.
Set Input Function Target 1 to 5 (F900). This setting assigns S1 as the
control input terminal.
5.
Set Output Function Assigned to 21 (F905). This setting is a command
that writes the F115 selection (S1) to Virtual Input Terminal 1, activating
both.
6.
Enable the My Function parameter at
Always On or selecting My Function With TB Signal.
If set to My Function Always On, the combination of ST and F are
always On (both are connected to CC only during the S1
activation).
If set to My Function With TB Signal, set a discrete input terminal
to My Function Run Signal and connect it to CC to enable My
Function. Connect S1 to CC to activate the ST+F function. A
disconnection at either terminal will terminate the My Function
programming (discrete input terminal My Function Run Signal is
Anded with discrete input terminal S1).
Connect S1 to CC and the F-to-CC + the ST-to-CC functions will be carried
out using only S1.
With the aforementioned setup completed, provide a Frequency Command
(F004) and the motor will run at the commanded frequency.
Continued on next page.
P9 ASD Installation and Operation Manual
F900
to
F977
(F973
Table 9 on pg. 251
F977
to prevent the system from
F977
by selecting My Function
Direct Access Number — F977
Parameter Type — Selection List
Factory Default — None (Disabled)
Changeable During Run — No
DANGER
This parameter must always be set to
None at the start of the My Function
setup and remain set to None until all
and
of the My Function parameter
settings have been confirmed as
being correct.
If enabled for normal operation using
settings 1 or 2, the motor may start
and engage the driven equipment
unexpectedly upon receiving a Run
–
signal during the My Function setup.
F977
243
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