JMorel Posted April 13, 2017 Report Share Posted April 13, 2017 Hello ! I am a trainee and I have a project to do. I have to command the operation of a oven and I'm trying to do that but I have a problem. By the way I'm using Visilogic, a V570 screen, a snap-in V200-18-E3XB and an expansion IO-RO16. So my problem is the following : I want to test my program but when I force a input to set or reset after that this unput is not working anymore, it's like blocked. As you can see on the image below. So I'd like to know if there is something I can do to get back the good operation or if I'm doing something wrong. (sorry if it's in french but I am :3 ) Thank you in advance for your help. J.MOREL Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 Did you Cancel Force on the Input when you were done? Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 13, 2017 Author Report Share Posted April 13, 2017 Well I Set and later I Reset. It's not the same I guess ? When Can I Cancel Force ? Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 13, 2017 Author Report Share Posted April 13, 2017 I just have the Set/Reset which is on the following image Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 Force is for INPUTS, Set & Reset are for Memory Bits. A Bit that is manually Set or Reset will remain Set or Reset until there is activation of a Set or Reset Coil in the ladder. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 In your picture, you cannot change the value of MB111 manually since it is being activated by a Direct Coil on every PLC scan. In order to affect the value of MB111, you must change MB100 or MB40. Quote Link to comment Share on other sites More sharing options...
AlexUT Posted April 13, 2017 Report Share Posted April 13, 2017 Hi JMorel, Right-click on Set/Reset and select Cancel Force. Does this help? Quote Link to comment Share on other sites More sharing options...
Cam Posted April 13, 2017 Report Share Posted April 13, 2017 Your MB 111 is being controlled by a direct coil every scan. You need to change the value of MB100 or MB 40 in order for MB 111 to be affected. Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 13, 2017 Author Report Share Posted April 13, 2017 Flex727 and Cam, I get that, it was just to give you an example of what i was talking about. AlexUT, I tried to Right-click on Set/Reset but nothing happened ! What have I done ?! Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 As I said, Force is only for Inputs, as in memory addresses that start with "I". Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 @JMorel, can you restate what it is you're trying to do? Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 13, 2017 Author Report Share Posted April 13, 2017 First of all I have to make an oven in operation. So if the button "Start Cycle" is pushed and if the temperature sensor is detected the output 32 will turn on which is going to switch on the oven. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 I meant more specifically, what is the problem you're trying to fix here? Quote Link to comment Share on other sites More sharing options...
Cam Posted April 13, 2017 Report Share Posted April 13, 2017 Once you force and Input to 1(via info mode or online mode) it will stay one until you force it to 0 or cancel the force(return it to normal operation). This can be done as described by Alex or from the info mode on the PLC. Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 13, 2017 Author Report Share Posted April 13, 2017 Oh, sorry, I set and reset things that shouldn't be, like you told me. But now I can't make them back to their normal setting. I can't cancel force and the reset don't make it back to normal. Quote Link to comment Share on other sites More sharing options...
AlexUT Posted April 13, 2017 Report Share Posted April 13, 2017 If you did Force from VisiLogic, do Cancel Force from VisiLogic as well. The same with Info Mode Force. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 13, 2017 MVP 2021 Report Share Posted April 13, 2017 You can never manually Set or Reset any bit that is being activated by a Direct Coil. The only way this can happen is if the coil is in a subroutine that is not being called by the Main (or other) Routine. Post your code here and we can help you. Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 13, 2017 Author Report Share Posted April 13, 2017 I'm going to start all over again and i'll be back if i still have a problem Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 14, 2017 Author Report Share Posted April 14, 2017 Ok so here is my new program. I have a problem on the net 1, MB100 doesn't turn on whereas MB78 is turned on. And it's the same for the others nets. Is it because I forced them before even if it's supposed to be forced ? Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 14, 2017 MVP 2021 Report Share Posted April 14, 2017 Are you calling that subroutine in the Main Routine? As I said before, FORCE is only for INPUTS, not MBs. You can only manually SET or RESET a bit if it is not being activated by a Direct Coil in the ladder. Also in your picture in net 1, you have a SET coil (MB100) being activated by a Direct Contact (MB78). You cannot manually Reset MB100 as long as MB78 is on. Bottom line, only INPUTS can be forced, no other memory operand can be made to take on a value manually if it is being assigned in ladder on every scan. You cannot override the ladder logic from VisiLogic. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted April 15, 2017 MVP 2021 Report Share Posted April 15, 2017 On 4/14/2017 at 9:55 AM, Flex727 said: Bottom line, only INPUTS can be forced, no other memory operand can be made to take on a value manually if it is being assigned in ladder on every scan. You cannot override the ladder logic from VisiLogic. Just want to clarify - both INPUTS and OUTPUTS can be forced, but I believe the rest of my statement about other memory operands stands. Thanks for the heads up, @Ausman! Quote Link to comment Share on other sites More sharing options...
MVP 2021 Ausman Posted April 15, 2017 MVP 2021 Report Share Posted April 15, 2017 One thing that is missing to my eye is setting the power up values, and likely all the coils need to be done as reset. Perhaps the program is carrying over previous operations? I would also be doing a full initialise and reset on each trial of a new program. There are many other operations in this program that are not shown that could be affecting things. Don't forget the ability to find operands etc by right clicking them in the operand list and doing a find. This is invaluable in ensuring that you haven't forgotten/lost track of a wrong placement somewhere that can affect things. cheers, Aus Quote Link to comment Share on other sites More sharing options...
JMorel Posted April 19, 2017 Author Report Share Posted April 19, 2017 I finnally found what I was searching for ! In fact all I wanted at the beginning was to reset everything in my LADDER (sort of) because I forced things that I KNOW can't be forced but I did and it worked but at the end it was blocked and I could'nt do anything. That's why I wanted to restart everything. So I found the reset options in the PC settings, and I did "Initialize and Reset" and I was excaltly what I wanted to do ! Thanks for your help ! Quote Link to comment Share on other sites More sharing options...
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