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8 • DESCRIPTION OF OUTPUT FUNCTIONS

out=3 Function U3 - Cyclical with timed reset

As opposed to the previous function, the timer reloads the preset value 

(S.P.1) when time 2 (S.P.2) has elapsed, during which the output remained 

active.

The other conditions are unchanged.

out=4 Function U4 Latch 1 on output

When the time elapses, the relay energizes but the timer continues (in this 

case) to count down toward negative values.

Signal IN2 resets the elapsed time, reloads the preset and resets the output.

If input IN3 arrives when the preset has already been reached, it reverses 

the direction of the count (in this case UP) and, if it passes “0,” de-energizes 

the output. 

out=5 Function U5 Latch 2 on output

Similar to the previous function, but the first time the timer reaches the set 

time, in addition to energizing the output, it immediately reloads the preset 

value and then continues as described for function U4, with the difference 

that the relay remains energized even if the timer value exceeds the trip 

point.

out=6 Function U6 Non-cyclical monostable with reset.

Similar to function U3, but with the difference that at the end of timings the 

timer reloads the preset value only after input IN2.

out=7 Function U7 Cyclical double counter with superimposed counts.

Similar to U2, but instead of Timer 1 and Timer 2 there are Counter 1 and 

Counter 2 with IN1 clock input.

out=8 Function U8 Cyclical double counter with alternating counts

Similar to U3, but instead of Timer 1 and Timer 2 there are Counter 1 and 

Counter 2 with IN1 clock input.

Function (U3) Cyclical timer with timed reset

(b)

(a)

Timer 1

IN1
IN2

Relay

IN3

Relay

Timer 2

Timer 1
Timer 2

Time

Function (U4) Timer with Output 1 memory

(b)

(a)

Timer

IN1

IN2

Relay

IN3

Timer

Relay

Time

Function (U5) Timer with Output 2 memory

(b)

(a)

Timer

IN1

IN2

Relay

IN3

Timer

Relay

Time

Function (U6) non-cyclical monostable timer with reset

(b)

(a)

Timer 1

IN1
IN2

Relay

IN3

Relay

Timer 2

Timer

Timer 2

Time

6

80469C_MHW_556_02-2011_ENG

Summary of Contents for 556

Page 1: ...in peak functions IN3 Hold input In this configuration as well the display and setting can be expressed as the value converted into engineering units by means of the MOL and DIV factors DRM Gefran instruments replaced by model described Output functions The output performs the following functions configuration as timer with countdown and input IN3 with HOLD a or UP DOWN b function In all other cas...

Page 2: ...eters can be set during configuration The decimal point on the right indicates display of set 2 F LED signals I1 State of IN1 input signal Start Stop in case of timer Clock in case of counter and frequency meter I2 State of IN2 input signal in case of timer and frequency meter IN3 in case of counter LED off corresponds to input OFF LED on corresponds to input ON O State of output relay LED on rela...

Page 3: ...N2 RESET IN3 HOLD or UP DOWN see configuration of IN3 functions If the function of IN3 is defined as UP DOWN it causes inversion of the current value of Time 1 Time 2 maintains its direction If the timer is configured to down Fun 0 it loads the preset value and counts down toward zero by closing IN3 if configured to active when closed you tempo rarily reverse the direction of time 1 to up until Fu...

Page 4: ...ions displayed value frequency MUL DIV Example 1 You want to display the number of rpms of a wheel with 250 pulses rev Rpm frequency 60 250 frequency 6 25 Set FP 0 MUL 6 DIV 25 Example 2 You want to determine the frequency in impulses second of a system with a decimal figure using a sampling time of 5 sec for greater stability Set FP 12 MUL 1 DIV 5 P d 1 t SP 5 0 In operation as frequency meter th...

Page 5: ... FUNCTIONS The figures show the Timer functions Typ 0 with countdown Fun 0 For counters Typ 1 in cases out 1 6 Timer and Timer 1 become Counter 1 and Counter 2 For the frequency meter Typ 2 with out 4 there is a second setpoint for hysteresis a IN3 0 IN 3 with HOLD display function b IN3 1 IN3 with UP DOWN function out 1 Standard U1 Function Timing begins and proceeds until the trip point if the I...

Page 6: ...scribed for function U4 with the difference that the relay remains energized even if the timer value exceeds the trip point out 6 Function U6 Non cyclical monostable with reset Similar to function U3 but with the difference that at the end of timings the timer reloads the preset value only after input IN2 out 7 Function U7 Cyclical double counter with superimposed counts Similar to U2 but instead ...

Page 7: ...If the device has faston terminals they must be protected and isolated if the device has screw terminals wires should be attached at least in pairs Power supplied from a disconnecting switch with fuse for the device section path of wires from switch to devices should be as straight as possible the same supply should not be used to power relays contactors solenoid valves etc if the voltage waveform...

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