Hitachi SJ300 Series Engineering Note

Hitachi America, Ltd.
SUBJECT: CAUTIONS!! ANALOG INPUT FUNCTION
AFFECTED MODELS: ALL SJ300 AND L300P
If the value of parameter A001 (Frequency Source Selection) is set to "01"
(terminal)
- AND -
the AT function (data=16) is NOT assigned to any of the intelligent input
terminals, the function of the "O2" analog input terminal will be as described in
the table below:
Value of Parameter
A006 (O2 Selection)
00 ( Independent)
01 (Only Positive)
02 (Both Positive and
Negative
Summary: In the case where the AT function is not assigned to any input
terminal, and REVERSE rotation is not desired or unsafe, make sure that A006 is
set to a value of "01".
PGC - 10/23/01
ENGINEERING NOTE
Action of Analog Inputs
Only the signal at the O2 terminal will reflected.
Terminals O and OI will be disabled. When the signal at
O2 becomes negative, the speed reference becomes
negative, resulting in REVERSE direction of rotation. The
action is the same when the multispeed terminal(s)
and/or the jog terminals are ON.
The speed reference will be the SUM of O+OI+O2. When
the sum is negative, speed will be ZERO.
The speed reference will be the SUM of O+OI+O2. When
the sum is negative, the speed reference becomes
negative, resulting in REVERSE direction of rotation. The
action is the same when the multispeed terminal(s)
and/or the jog terminals are ON
EN-102301-1
Page 1 of 1