Panasonic LT4H/-L Manual 

Also see for LT4H: Specifications

Contents

specifications

Setting the operation mode, time range, and timeSetting procedure 1) Setting the operation mode and time rangeSet the operation mode and time range with the DIP switches on the side of the LT4H timer.DIP switchesSetting procedure 2) Setting the timeSet the set time with the keys (UP and DOWN keys) on the front of the LT4H timer.DIP switchItem DIP switch No.1 2 3ON ON ON A: Power on delay 1OFF OFF OFF A2: Power on delay 2ON OFF OFF B: Signal on delayOFF ON OFF C: Signal off delayON ON OFF D: Pulse One shotOFF OFF ON E: Pulse On delayON OFF ON F: Signal FlickerOFF ON ON G: Totalizing On delayTable 1: Setting the operation modeTable 2: Setting the time rangeOperation modeOperation mode Refer to table 1123Minimum input reset, start, andstop signal width 20 ms 1 ms*4Time delay direction Addition Subtraction5Time range Refer to table 2678ONOFFDIP switch No.6 7 8ON ON ON 0.001 s to 9.999 sOFF OFF OFF 0.01 s to 99.99 sON OFF OFF 0.1 s to 999.9 sOFF ON OFF 1 s to 9999 sON ON OFF 0 min 01 s to 99 min 59 sOFF OFF ON 0.1 min to 999.9 minON OFF ON 0 h 01 min to 99 h 59 minOFF ON ON 0.1 h to 999.9 hTime rangeNotes: 1) Set the DIP switches before installing the timer.2) When the DIP SW setting is changed, turn off the power once.3) The DIP switches are set as ON before shipping.ON1 2 3 4 5 6 7 8DIP switches(Same for screw terminal type)Q Elapsed time displayW Set time displayE Time delay indicatorR Controlled output indicatorT Reset indicatorY Lock indicatorU Time units displayI UP keysChanges the corresponding digit of theset time in the addition direction(upwards)O DOWN keysChanges the corresponding digit of theset time in the subtraction direction(downwards)P RESET switchResets the elapsed time and the output{ LOCK switchLocks the operation of all keys on the unit987234561110DOWNUPLOCKRESETsm1hL O C KR S TO P .TIMERLT4H• Changing the set time1. It is possible to change the set timewith the up and down keys even dur-ing time delay with the timer.However, be aware of the followingpoints.1) If the set time is changed to less thanthe elapsed time with the time delay setto the addition direction, time delay willcontinue until the elapsed time reachesfull scale, returns to zero, and thenreaches the new set time. If the set timeis changed to a time above the elapsedtime, the time delay will continue until theelapsed time reaches the new set time.2) If the time delay is set to the subtrac-tion direction, time delay will continueuntil “0” regardless of the new set time.2. If the set time is changed to “0,” theunit will operate differently dependingon the operation mode.1) If the operation mode is set to A(power on delay 1) or A2 (power ondelay 2), the output will turn on when thepower supply is turned on. However, theoutput will be off while reset is beinginput.2) In the other modes, the output turnson when the start is input. When theoperation mode is C (signal off delay), D(Pulse one shot), or F (Signal flicker),only when the start input is on does theoutput turn on. Also, when the reset isbeing input, the output is off.Front display section* The 8-pin type does not have the stop input, so that the dipswitch can be changed over between reset and start inputs.The signal range of the lock input is fixed (minimum 20 ms).LT4H/-L• Power failure memoryThe EEPROM is used for power failure memory. It has a life of Min. 105 over-writings.The EEPROM is overwriting with the following timing.* Be aware that the contents of EEPROM for all modes will be overwritten when power is turned OFF during input to external lock terminals R to E and to .Such an action does not exist by doing lock operation from the front.67Output mode Overwrite timingPower ON delay (2) A2 When power is OFFAddition G Change of preset value or start, reset inputWhen power is OFF after being ONOther modes When power is OFF after changing preset valueAll Rights Reserved © COPYRIGHT Matsushita Electric Works, Ltd.