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234 H9 ASD Installation and Operation Manual
Combined Terminal Function (Cont.)
Output terminals may also be combined to produce one output response to
multiple conditions using the computational operators of
Table 11 on pg. 245.
Assigning more than one function to a discrete output 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 Low Speed Detection and Low Current Detection to one output
terminal). Using Virtual Terminals 1 – 4 (
F973 – F976) are required to use
this function.
In the example below, the Low Speed Signal (detection) terminal assignment
and the Low Current Detection terminal assignment will be combined as one
terminal output to illustrate this feature. However, any two of the discrete
output terminal assignments listed in
Table 8 on pg. 241 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. From Program ⇒ Direct Access ⇒ Unknown Numbers, select Enabled.
3. Set the OUT1 terminal (F130) to My Function Output 1 (222).
4. Set Input Function Target 1 (F900) to 1004 (Low Speed Signal
detection). See Table 8 on pg. 241 for a complete listing of available
settings.
5. Set Input Function Target 2 (F902) to 1026 (Low Current Alarm). See
Table 8 on pg. 241 for a complete listing of available settings.
6. Set Input Function Command 1 (F901) to AND (3). This setting assigns
an operator to the Input Function Target 1 and the Input Function
Target 2 settings.
7. Set Output Function Assigned (F905) to 1222. This setting will transfer
the results of the logical AND to My Function Output 1 (OUT1).
8. Enable the My Function parameter at F977 by selecting My Function
Always On.
With the aforementioned setup completed in the example, once the Low Speed
Signal AND the Low Current Alarm are active, the OUT1 terminal is
activated for the duration of the Low Speed/Low Current condition.
See the My Function Instruction Manual (P/N 58692) for a complete
description of the setup requirements and operational information of the My
Function parameter.
Direct Access Number — F977
Parameter Type — Selection List
Factory Default — None (Disabled)
Changeable During Run — No
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.
DANGER
F977 F977