Hitachi L300P Series Instruction Manual page 186

4–52
Analog Input Operation
The following tables show the available analog input settings. Parameters A006, A005, and
input terminal [AT] determine the External Frequency Command input terminals that are avail-
able and how they function. The Trim Frequency input [O2]—[L] is available (when check
marked) for some settings. Other settings make the reverse direction (in addition to forward)
available for bipolar input settings (when check marked). A bipolar input responds to positive
input voltages with a forward motor rotation, and to negative input voltages with reverse motor
rotation.
A006 A005 [AT]
00 00 OFF
OR
ON
03
01 OFF
ON
01 00 OFF
Example
ON
1
01 OFF
ON
02 00 OFF
Example
ON
2
01 OFF
ON
The table below applies when the [AT] input function is not assigned to any intelligent input
terminal. The A005 setting, normally used in conjunction with an [AT] input, is ignored.
A006 A005 [AT]
00 —
01 —
(not
assigned
to any
02 —
input
terminal)
03 —
CAUTION: Whenever the [AT] input function is not assigned to any input terminal and
reverse rotation is not desired or is unsafe, be sure to set A006 = 01. This setting makes the
[O2] input unipolar only.
External Frequency Trim Frequency
Command Input Command Input
[O]
[OI]
[O]
[O2]
[O]
[OI]
[O]
[O2]
[O]
[OI]
[O]
[O2]
External Frequency Trim Frequency
Command Input Command Input
[O2]
Summation of
[O] and [OI]
Summation of
[O] and [OI]
Summation of
[O] and [OI]
Reverse avail.
(bipolar input)
✘ ✘
✘ ✘
✘ ✘
✘ ✔
✘
[O2]
✘
[O2]
✘
[O2]
✘ ✔
✔
[O2]
✔
[O2]
✔
[O2]
✘ ✔
Reverse avail.
(bipolar input)
✘ ✔
✘
[O2]
✔
[O2]
✘ ✘