DESCRIPTION OF OPERATING MODES
7
mode implies that when the “RESET” key is
pressed or the Reset input is energized, the con-
trol is reset to preset 3; that is, forced to have a
value equal to the preset 3 value. When the con-
trol is in the Preset mode, transistor output 3 turns
on when the counter reaches zero.
Automatic Recycle Operation
It may be desirable to have the control automati-
cally reset itself for repeated cycles. Auto Recycle
can be programmed to occur when any one, any
of two or any of the three transistor outputs turn
on. When in the Reset mode and any of the
selected outputs turn on, the counter is automati-
cally reset to zero. When in the Preset mode and
any of the selected outputs turn on, the counter is
automatically reset to the Preset 3 value.
OUTPUT AND RELAY OPERATION
The outputs of the control consist of five transis-
tors and two relays. The output associated with
Preset 1 and the output associated with Preset 2
each provide a pair of transistors. The two transis-
tors in each pair operate in parallel; that is, when
one of the transistors is turned on, the other is
turned on as well. The fifth transistor is associated
with Preset 3. The collectors of each of these tran-
sistors is brought out to individual screw terminals.
The relays are uncommitted and may be assigned
by the user to any of the 5 transistor outputs. This
is done by connecting a single wire for each relay
to the desired transistor output screw terminal.
When shipped from the factory, relay K1 is
prewired to Output 1 (terminal 8) and relay K2 is
prewired to Output 2 (terminal 9).
Turning Outputs On
There are three programmable modes which affect
when the transistor outputs turn on (conduct to DC
Common.) These modes are:
Independent Mode
Prewarn Mode
Sequential Mode
In addition, the reset and preset modes affect
when transistor output 3 turns on.
In the Independent and Prewarn modes, each out-
put turns on whenever the count reaches the value
specified in Figure 3. This occurs regardless of the
order in which the presets are reached. Note that
the Prewarn/Preset modes operate the same as
the Independent/Preset mode.
The Prewarn mode allows Output 1 and/or Output
2 to be programmed to turn on a specific number
of counts before Output 3. This mode is valid only
when the control is programmed to Reset to Zero.
In the Prewarn mode, Preset 1 and/or Preset 2 are
set to the number of counts before Output 3 at
which the Prewarn Output(s) are desired. When
Preset 3 is changed, the count values at which
Output 1 and/or Output 2 actuate (Prewarn Val-
ues) are also changed by the same amount. The
Prewarn Value(s) (Preset 3 minus Preset 1 or Pre-
set 3 minus Preset 2) may be displayed by
EVENT
PROGRAMMABLE FUNCTION
Count Reaches
Independent
Prewarn**
Sequential
Prewarn 1
Prewarn 2
Prewarn 1 & 2
Reset
Preset
Reset
Preset
Reset
Preset
Reset
Preset
Reset
Preset
Preset 1
Preset 2
Preset 3
Preset 3-Preset 1
Preset 3-Preset 2
Zero
1
2
3
1
2
3
2
3
1
1
2
3
1
3
2
1
2
3
3
1
2
1
2
3
1*
2*
3*
1*,2*,3*
“1”, “2”, or “3” indicates which output turns on.
*Output turns on only if it is next in sequence.
**The Preset for a Prewarn Output must be less than Preset 3.
Figure 3.
Output Actuation Table
