Rockwell Automation 1336 8A-48A Fiber Industry - Manual (Page 29)

2–21 Installation/Wiring
Speed Select/Frequency Reference
The drive speed command can be obtained from a number of
different sources. The source is determined by drive programming
and the condition of the Speed Select Inputs on TB3 (or reference
select bits of command word if PLC controlled – see Appendix A).
The default source for a command reference (all speed select inputs
open) is the selection programmed in [Freq Select 1]. If any of the
speed select inputs are closed, the drive will use other parameters as
the speed command source. Refer to Table 2.F and the examples that
follow.
Table 2.F
Speed Select Input State vs. Frequency Source
Speed Select 3 Speed Select 2 Speed Select 1 Frequency Source
Open Open Open [Freq Select 1]
Open Open Closed [Freq Select 2]
Accessed through [Freq Select 2] parameter [Preset Freq 1]
Open Closed Open [Preset Freq 2]
Open Closed Closed [Preset Freq 3]
Closed Open Open [Preset Freq 4]
Closed Open Closed [Preset Freq 5]
Closed Closed Open [Preset Freq 6]
Closed Closed Closed [Preset Freq 7]
Important: The final speed command may be affected by the type
of modulation selected with [Speed Control], parameter
77. Refer to [Speed Control] in Chapter 5 for further
information.
Example 1
Input Mode 2 – Application calls for a local Human Interface
Module (HIM) speed command or remote 4-20mA from a PLC. The
drive is programmed as follows:
– [Freq Select 1] = Adapter 1
– [Freq Select 2] = 4-20mA
With Speed Select inputs 2 & 3 open and the selector switch set to
“Remote” (Speed Select 1 closed), the drive will follow [Freq Select
2] or 4-20mA. With the switch set to “Local” (Speed Select 1 open)
all speed select inputs are open and the drive will follow the local
HIM (Adapter 1) as selected with [Freq Select 1].
Speed Select 1
Speed Select 2 (Open)
Speed Select 3 (Open) 26
Local
Remote
27
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