Amada Miyachi Unitek STA-100A, Руководство по эксплуатации, Страница: 41 / 154

CHAPTER 3: USING STA SERIES CONTROL FUNCTIONS
STA SERIES AC CONTROLS
990-351 3-13
Section VIII: System Values Screens
System Values Screen 1
To get this screen, go to the
MODE
screen,
highlight
System Values Screen 1

,
and press
the
DATA +
button on the Control Panel.
NOTE: Some values are detected and displayed
by the Control. They can not be changed by the
operator.
SYSTEM VALUES SCREEN 1
FULL CURR=10KA COIL=01X
MAX # OF SCR=1 CO/-
TURNS RATIO=053: 1 NUM VALVES=04
CNTRL MODE=%HEAT SEC. VALVES STATUS

BIN. SCHED. SELECT=OFF MODE=SPOT
FIRING SWITCH=ONE STAGE
More

FULL CURR.
– The full current (
FULL CURR.)
is programmable from
05 kA
to
80 kA
. For proper
operation, this value must be at the current obtained when the unit is fired with a 180
E
conduction angle
into the secondary circuit that will be used for welding. If the transformer taps are changed, this value
must be adjusted.
MAX # OF SCR
– Denotes the number of SCRs available in the Control. The factory-set default is
4
, so
this must be changed to the appropriate number.
TURNS RATIO
– This adjusts the transformer turns ratio for the constant current, and is programmable
from
001:1
to
200:1
.
CNTRL MODE
– Control Mode (
CNTRL MODE
) allows the operator to set the control mode of operation.
Selections are pre-set by the factory and depend on the type of current sensing coil (if any) installed.

%HEAT SEC –
Percent Heat Secondary

SEC. C.C.
– Secondary Constant Current
OR

%HEAT PRI –
Percent Heat Primary

PRI. C.C.
– Primary Constant Current
By placing the cursor at the first character of the
CNTRL MODE
selection and using the
DATA +/–
pushbutton, the operator can toggle between the modes that are applicable to that machine. %HEAT
works for all machines. SEC. CC requires a secondary current coil. PRI CC requires a primary current
coil. Selecting any one of these modes will automatically turn the other modes off. The Control is
shipped in the
% HEAT
mode as the default.
BIN. SCHED. SELECT
– Binary Schedule Select (
BIN. SCHED. SELECT
) determines whether or not the
binary schedule select input is active. That is, it enables or disables the ability for the Control to be
slaved to a separate Programmable Logic Controller (PLC) or other device with BCD capability. There
are only two options,
OFF
or
ON
; the default is
OFF
. If
OFF
, the binary inputs are ignored and the
Control defaults to that which is presented on the control panel. If
ON
, the binary select input is active
and an external device controls which schedule is used. Linking is disabled if Binary Schedule Select is
ON.
FIRING SWITCH
– Selects either two stage or single stage firing switch.
COIL
–This Control has no option; it is set for
1X
.
C/– –
By placing the cursor at the first character of this field and using the
DATA +/–
pushbutton, the operator can increase or decrease the contrast of the LCD screen.