Eaton Cutler-Hammer Durant PRESIDENT Series Installation And Operation Manual

Contents

INSTALLATION INSTRUCTIONS8selecting the appropriate Function Code (see Fig-ure 22).In the Sequential mode, each output turns on asspecified in Figure 3, only if that output is next insequence (see Figure 4). The counter automati-cally resets and advances the sequence after thefirst and second events shown in Figure 4. In theReset mode the counter is automatically reset tozero, in the Preset mode the counter is automati-cally reset to Preset 2 after the first event and Pre-set 1 after the second event shown in Figure 4.The counter does not automatically reset after thethird event unless automatic recycle is pro-grammed to occur at that output. An automaticrecycle at any event resets both the counter andthe sequence. In the count mode, the PresetLED’s light to show which Output is next insequence.In the Sequential mode, the reset input or resetkey may be used at any time to reset both thecounter and the sequence. A separate program-mable input (terminal 16) may be used at any timeto reset the counter without resetting thesequence.Turning Outputs OffOnce a transistor output is turned on, it remains onuntil it is unlatched. There are five ways to unlatcheach output:1. TimeoutEach output has a separate timeout function.The timeout function causes an output tounlatch after a specified “on” time. The allow-able time range is from 0.01 to 99.99 seconds.A value of 0 inhibits the timeout function forthat output. In this case, the output remains onuntil unlatched by one of the following meth-ods.2. Unlatch at Reset (UAR)Each output may be programmed to unlatchwhen the reset key is pushed or the reset inputis energized (goes low).3. Latch Until Reset Complete (LURC)Each output may be programmed to unlatchwhen the reset key is released or the resetinput is de-energized (goes high).4. Unlatch at Alternate OutputEach output may be programmed to unlatchwhen one or either of the remaining two out-puts turns on.5. Unlatch InputsTwo programmable unlatch inputs may beused to unlatch any two of the three outputs.When an unlatch input is energized, theselected output unlatches.Figure 4. Output Sequence TableReverse OutputsEach transistor output may be programmed tooperate in reverse. A reversed output is normallyon (conducts to DC Common) and turns off whenFigure 3 shows that it should turn on. Likewise, areversed output turns on when it is timed out orunlatched.When power is interrupted, all outputs turn off andwill remain off when power is reapplied. It is there-fore necessary to “enable” all reversed outputsafter a power interruption. This is usually done byenergizing the appropriate unlatch input(s) or byprogramming the reversed outputs to latch untilreset complete and then resetting the control.,,,, WARNINGA POWER OUTAGE CAUSES THE OUT-PUTS AND RELAYS TO TURN OFFREGARDLESS OF THE OPERATINGMODE SELECTED. BE SURE THATTHIS EFFECT IS NOT HAZARDOUS TOTHE OPERATOR.Event Sequential ModeReset PresetFirstSecondThirdOutput 1Output 2Output 3Output 3Output 2Output 1