Siemens WinCC Flexible 2005 SP1 Hotfix 7 and LED assignment

[kemppioy]

Hey,

I have Siemens OP177 panel and I am having a problem mapping the function key leds in WinCC flexible 2005 SP1 HF7. I cannot find a good example of how to do this. Is it so that I can just toggle a bit in the PLC and make the LED flash? I made an word array tag in the PLC data block. When I go to the WinCC template screen, I can put the LED Tag tagname there and then it ask for a bit number. I have put in zero for bit number. I tried to use the WinCC simulator and toggle bit zero but I do not see the LED flashing on the simulator nor do I really know if that is possible using simulation. Does someone have a good example of mapping the LED's? Also I noticed an excellent "feature" there that when I go to the template screen, click on the function key, then select view - properties, the LED tag field is grayed out and will not let me enter in a tagname. Also sometimes the "use global assignment" field is grayed out where I cannot select it. Is there another way to get those available again? I did a rebuild and then all the function keys allowed me to select "use global assignment" but the LED Tag field is still grayed out. Any clues on this?

Best Regards,

PK

 

[ivo.maenen]

You define the tag (word-size)and the start-bit (x) that controls the led of a K-key in the 'template'. If this tag does not exist, you can direct make a new tag in the screen 'template'.

In other screens you can not change the settings of this K-key.They are greyed out, but you should be able to see the name of the tag and the startbit of the key.

Maybe your problem is the difference between high-byte/low-byte in the plc and in OP.

example: led-word = MW62

MW 62 - MW 63 (plc)

15......0 (OP-bitnumber of the led-tag)


Every led-assigment has 2 bits

x+1 x led
0 0 off
0 1 fast on-off
1 0 slow on-off
1 1 on

 

[kemppioy]

high byte/ low byte

Hei Ivo,

Is it so that WinCC reads those high byte and low bytes backwards? I have noticed yesterday the same thing that I trigger bit 0 of a word in the PLC and bit 0 of the same word in the WinCC panel did not trigger. Was this also working the same way in Protool? I have not done extensive Siemens programming so not sure how Protool worked. I use this same PLC with Wonderware Intouch and I can read the bits of a word exactly like I program them in my alarm system but there in Intouch I read the individual bits directly from the word. I have all the alarms in Intouch as bit alarms so I have a discrete tag for each alarm. Can I do this as well with WinCC flexible? Also if I need to use a word can I flip flop the word in Siemens S7 PLC before sending it to the WinCC panel so that if bit 0 in the PLC is set , bit 0 in the WinCC panel is set as well?



Thanks for your help.

PK

 

[ivo.maenen]

Global softkeys: they have the same function in every OP-screen. The key will have a green triangle on your pc-screen.

Local softkeys: the function can be different in every OP-screen. The key will have a yellow triangle on your pc-screen.

If a key is 'global' as well as 'local', then the 'local'-function will be executed. The key will have a green and yellow color.


You define global softkeys in the screen 'template'. You only need to give a function to the softkey. In 'template' you can not mark 'use global assigment'. Now the softkey will get a green triangle.

You can open another screen and you will see that the softkey also will have a green triangle and 'use global assigment' will be marked. The rest of the options will be greyed out. If you want to use a local assigment you will need to unmark 'use global assigment'. Then the greyed-out-fields will be white again and you can define them.

 

[ivo.maenen]

Hei Ivo,

Is it so that WinCC reads those high byte and low bytes backwards? I have noticed yesterday the same thing that I trigger bit 0 of a word in the PLC and bit 0 of the same word in the WinCC panel did not trigger. Was this also working the same way in Protool?
PK

Protool showed you what bits (the start-bit) were used e.g. M 1.0. But I guess this was the first bit to use in the example-program I am looking at, so I would say yes, Protool did the same with the high and low-bytes, but I'm not sure about this.

I have not done extensive Siemens programming so not sure how Protool worked. I use this same PLC with Wonderware Intouch and I can read the bits of a word exactly like I program them in my alarm system but there in Intouch I read the individual bits directly from the word. I have all the alarms in Intouch as bit alarms so I have a discrete tag for each alarm. Can I do this as well with WinCC flexible?
PK

If I did my homework good enough the last time I used WinCC flex then you must use a word.

Also if I need to use a word can I flip flop the word in Siemens S7 PLC before sending it to the WinCC panel so that if bit 0 in the PLC is set , bit 0 in the WinCC panel is set as well?
PK

Off course you can.

 

[kemppioy]

Hei,

Thanks for the help. Finally figured it out. The alarm word works a bit differently then the LED word so that was a bit confusing at first. I used the CAW instruction in STL to swap the bytes in accu 1 and 2. Now the alarm words work correctly. I have a question for you though since you seem to know a lot about siemens.

I am trying to look at a 16 bit word and see if any bit has changed from 0 to 1 and then trigger a bit to show that a new alarm has arrived. In Allen Bradley I used a word compare instruction for this. I would move the word into a memory area and then compare it to see if the bits have changed from 0-1. How do I do this with Siemens S7? Is there a word compare somewhere?

Thanks!