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W7 ASD Installation and Operation Manual 63
Communications Reference Setpoint #1
Program Communications Settings Communication Reference
Setpoint #1
When enabled via the Communications Reference Select parameter, this
parameter is used to allow the user to set the gain and bias of the speed control
input to the ASD when the speed control signal is received via the source
selected at the Communications Reference Select parameter.
Gain and Bias Settings
When operating in the Speed Control mode and using one of the control
sources from the Communications Reference Select parameter, the settings
that determine the gain and bias properties of the input signal are:
• Communications Speed #1 (Hz),
• the communications input signal value that represents Communications
Speed #1 (Hz),
• Communications Speed #2 (Hz), and
• the communications input signal value that represents Communications
Speed #2 (Hz).
Once set, as the input signal value changes, the output frequency of the ASD
will vary in accordance with the above settings.
This parameter sets the Communications Reference input value that represents
Communications Speed #1. This value is entered as 0 to 100% of the
Communications Reference input value range.
Changes made to this parameter require that the power be cycled (Off then On)
for the changes to take effect.
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 100.0
Units — %
Frequency Settings
Communications Reference Setpoint #2
Program Communications Settings Comm Reference Setpoint #2
This parameter is used to set the gain and bias of the Communications
Reference speed control input.
See Communications Reference Setpoint #1 for further information on this
setting.
This parameter sets the Communications Reference input value that represents
Communications Speed #2 (Hz). This value is entered as 0 to 100% of the
Communications Reference input value range.
Changes made to this parameter require that the power be cycled (Off then On)
for the changes to take effect.
Parameter Type — Numerical
Factory Default — 100.0
Changeable During Run — Yes
Minimum — 0.00
Maximum — 100.0
Units — %
Communications Reference Selection
Program Communications Settings Communications Reference
Selection
This parameter Enable/Disables speed control via communications. Selecting a
signal source enables this function. Selecting Disable disables this function.
Settings:
Communications Card
RS232/RS485
LCD Keypad
Disabled
Parameter Type — Selection List
Factory Default — Disabled
Changeable During Run — Yes
Communications Reference Setpoint #1 Communications Reference Selection