Hitachi L300P - Manual (Page 164)

Using Intelligent Input Terminals
Oper
ations
a
nd Moni
tor
ing
4–34
Run Enable for
FW/RV (–xFU2
models only) The Run Enable for FW/RV input provides a way to enable or disable the [FW] and [RV] input
terminals in real time, including a Run command from an operator keypad. This is useful for
applications that require a logic type safety interlock for FWD Run or REV Run commands.
The Run Enable for FW/RV function is assigned to an intelligent input terminal using option
code 49. When assigned, the output frequency operates as a logical AND of the Run Enable for
FW/RV input and a [FW], [RV], or keypad Run command input. The Run Enable for RV input
is level-sensitive, as shown in the timing diagram below. The leading edges (OFF-to-ON transi-
tions) of the Run Enable for RV input and the [FW] or [RV] input can occur in any order. The
output frequency follows the logical AND of these inputs.
Opt.
Code
Symbol Function Name
Input
State
Description
49 ROK Run Enable for
FW/RV ON [FW] and [RV] inputs and operator Run
key press operate normally
OFF [FW] and [RV] inputs and operator Run
key press are ignored; inverter output
remains OFF
Valid for inputs:
C001, C002, C003, C004,
C005
Required
settings: (none)
Notes:
• This function is only available on –xFU2
models.
• When the Run Enable for FW/RV function is
not assigned to any intelligent input terminal,
the FWD Run and REV Run commands
operate normally (directly control the output
frequency).
• To ensure safe inverter operation in
networked applications, you cannot change an
intelligent terminal assignment to/from
[ROK] (option code 49) via the network.
However, you can still read an [ROK] input
assignment over the network.
[F/R] terminal
[ROK] terminal
Output
frequency
t
5 3 1 4 2 FW TH
PLC P24 CM1
See I/O specs on page 4–8 .
ROK
Example (requires input configuration—
see page
3–43 ):