1 00:00:00,00 --> 00:00:06,000 Welcome to Part 6 on Mitsubishi FX PLC GX Works 2 tutorial. 2 00:00:07,500 --> 00:00:13,200 In the previous tutorial (part 5) we have discussed the timers 3 00:00:13,300 --> 00:00:21,000 of the Mitsubishi FX PLC and those were on delay timers. 4 00:00:22,500 --> 00:00:30,000 There is an Off Delay type of timer but not available to some models of Mitsubishi PLC. 5 00:00:32,000 --> 00:00:38,000 In this tutorial we will make a program so that we can have an Off Delay timer 6 00:00:38,100 --> 00:00:41,600 using an On Delay timer. 7 00:00:43,400 --> 00:00:47,500 Before that I will explain what is the difference between 8 00:00:47,600 --> 00:00:50,500 On delay timer and Off delay timer. 9 00:00:52,500 --> 00:01:00,400 In this timing chart we can see the difference between the two timers. 10 00:01:02,000 --> 00:01:06,000 With on delay timer, when the drive input (X0) is closed, 11 00:01:07,000 --> 00:01:13,000 the timer will start counting 12 00:01:13,100 --> 00:01:18,000 until it reaches the specified set value. 13 00:01:18,100 --> 00:01:25,000 When the counted value is equal to the set value, the timer contact turns on. 14 00:01:26,100 --> 00:01:32,000 When the timer contact closes, the the output coil turns on. 15 00:01:35,300 --> 00:01:52,000 As long as the drive input in On the timer remains On and so the output coil. 16 00:01:55,000 --> 00:02:02,500 When the drive input is switched off, immediately the timer will turn off 17 00:02:02,600 --> 00:02:06,000 and eventually the output coil Y0. 18 00:02:11,500 --> 00:02:18,000 While on the off delay timer, when the drive input X0 is turned on 19 00:02:18,100 --> 00:02:23,000 the output coil will also turn on. 20 00:02:23,100 --> 00:02:35,000 While the drive input is on, the off delay timer will not start counting 21 00:02:35,100 --> 00:02:39,700 and the output remains on. 22 00:02:41,000 --> 00:02:55,000 When the drive input is switched off, the off delay timer will start counting 23 00:02:56,000 --> 00:03:00,500 until it reaches the set value. 24 00:03:00,600 --> 00:03:12,500 The output coil is then switched off. 25 00:03:12,600 --> 00:03:21,500 Therefore there is a time delay to off the output after the input drive has been switched off. 26 00:03:26,100 --> 00:03:35,000 Now we will create some programs that will function as an off delay timer. 27 00:06:49,100 --> 00:06:58,800 When input X1 is switched on, the output coil Y1 is turned on. 28 00:07:00,000 --> 00:07:11,500 If input X1 is switched off timer T1 will start counting 29 00:07:12,500 --> 00:07:17,200 but output coil will remain turned on because of the latched contact. 30 00:07:23,000 --> 00:07:28,500 After input X1 has been switched off the timer starts counting. 31 00:07:29,000 --> 00:07:32,900 While the output Y1 remains on. 32 00:07:34,100 --> 00:07:40,500 When the count value reaches the set value equivalent to 20 seconds, 33 00:07:40,600 --> 00:07:47,800 the normally closed timer contact will open and output Y1 will be turned off. 34 00:07:47,900 --> 00:07:54,900 That is one example on how to program an off delay timer. 35 00:07:56,500 --> 00:08:00,500 Now we will make another program for an off delay timer. 36 00:10:18,700 --> 00:10:22,000 Now we will see the function of the new off delay program. 37 00:10:42,000 --> 00:10:46,000 When input X2 is switched on, output Y2 is turned on. 38 00:10:53,500 --> 00:10:58,000 If input X2 will be switched off, output Y2 should remain on. 39 00:10:58,100 --> 00:11:02,900 and the timer will start counting. 40 00:11:21,500 --> 00:11:25,500 When the counter value reaches the 20 seconds set value 41 00:11:25,600 --> 00:11:30,700 output Y2 will turn off because normally closed timer contact will open. 42 00:11:32,800 --> 00:11:39,000 Therefore we have an off delay on the output after the input has been switched off. 43 00:11:42,100 --> 00:11:48,600 We will make a third example program for an off delay timer. 44 00:11:53,500 --> 00:12:01,500 This time we will use a Set and Reset instruction. 45 00:14:39,400 --> 00:14:46,000 When input X4 is switched on, output Y4 is set. 46 00:14:56,500 --> 00:15:05,400 If input X4 is switched off, the timer will start counting 47 00:15:07,100 --> 00:15:14,100 but output Y4 will remain on due to the Set instruction. 48 00:15:16,500 --> 00:15:24,100 When the timer set value is reached the timer contact will close. 49 00:15:24,600 --> 00:15:29,000 Output Y4 will then be reset. 50 00:15:32,700 --> 00:15:35,300 Now we will switch off input X4. 51 00:15:37,500 --> 00:15:40,200 The timer starts counting. 52 00:15:41,100 --> 00:15:45,700 When the set value of 20 seconds is reached, 53 00:15:45,800 --> 00:15:49,000 this timer contact will close to reset Y4. 54 00:16:07,300 --> 00:16:16,100 Those are the examples on how to make an off delay timer 55 00:16:16,200 --> 00:16:25,800 since some FX PLCs like the FX1S, FX1N and FX3G don't have it. 56 00:16:27,500 --> 00:16:35,200 On the next video tutorial we will be discussing about counters. 57 00:16:37,100 --> 00:16:42,000 Thank you for watching.