Mitsubishi Electric M4853, Maintenance Manual

Page: 64 / 108

DIFFERENCES BETWEEN M4853 and M4853-1
(A) PCA
Item M4853 M4853-1
Remarks
1. Input Terminals
•Short-plug system •IC socket system
2.Customer adjusted
short-plug
(l)Choosing headload
conditions
•Three kind; HS, HM
and HC.
•Short-plugs can be
used to choose 2
types of internal
control for the
headload.
These types are that
in conjunction with
STANDARD READY and
that in conjunction
with HOLD READY.
•HL and HH have been
added. HL performs
headload in res­
ponse to the IN USE
signal during drive
select.
HH
per­
forms headload in
response to the
SPARE input signal
(connector Jl/Pl -
pin 2).
•Internal control of
Headload is done in
conjunction with
HOLD READY. No other
optional choice.
(2)Choosing motor
operation condi­
tions
•During MM short the
motor will start with
the ON signal. During
MS short, the motor
will start with the
Drive Select signal.
When both are in
short, it will start
with logical add.
And when both are open
the motor will not
start.
|
•Combinations of open
and short circuits
between MM and MS
allow the choice of
one of the 4 follow­
ing conditions.
1. When MM is open
and MS is shorted,
the motor starts
with the ON signal.
2. When MM is shorted
and MS is open,
the motor starts
with the DRIVE
SELECT signal.
3. When MM is open
and MS is open, 1
motor starts with
the previously
mentioned
logical add.
4. When MM is shorted
and MS is shorted,
\
it will result in j
RESERVED mode. j
(Motor start will
result when IN USE |
signal is latched !
to DRIVE SELECT j
signal.)