F977 | F977 |
My Function Selection
Program ⇒ My Function
This parameter Enables/Disables the configured My Function feature of the H9 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 F900 to F977 and is used to enhance the programmability of the H9 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 input terminal provides two advantages: it effectively expands the number of input terminals, and 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 (F973 – F976) are 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 input terminal assignments listed in Table 5 on pg. 236 may be combined in this manner.
Setup (example)
1.Disable the My Function parameter at F977 to prevent the system from 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 F977 by selecting My Function 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
With the aforementioned setup completed, provide a Frequency Command (F004) and the motor will run at the commanded frequency.
(Continued on pg. 234)
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 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.
H9 ASD Installation and Operation Manual | 233 |
