Hi
I am working for machine manufacturer and I am responsible for electrical diagram designing and PLC & HMI programming. Machine wiring is performed by a subcontractor. He uses a method of wire numbering which seems wrong.
For example, the button (S1) is connected to the PLC input (X10) through two terminals (X1:3) & (X2:5):
(S1)--|5|------|5|--(x2:5)--|5|------|3|--(x1:3)--|3|------|X10|--(X10)
The devices are displayed in ( ), the wire markings are displayed in | |.
- Both ends of the first wire are marked with the terminal number of X2 terminal strip;
- The ends of the middle wire are marked with the terminal number of X2 and X1 terminal strips;
- Last wire is marked with the numbers of connected devices - X1 terminal strip and PLC input name.
What a mess.
I hope that my explanations and 'diagram' are clear.
Are there any standard containing rules for conductors marking in electrical circuits? I know that all wires connecting two devices have to be marked with the same number. Am I right? What is the correct marking?
Best Regards
Mihaylov
I am working for machine manufacturer and I am responsible for electrical diagram designing and PLC & HMI programming. Machine wiring is performed by a subcontractor. He uses a method of wire numbering which seems wrong.
For example, the button (S1) is connected to the PLC input (X10) through two terminals (X1:3) & (X2:5):
(S1)--|5|------|5|--(x2:5)--|5|------|3|--(x1:3)--|3|------|X10|--(X10)
The devices are displayed in ( ), the wire markings are displayed in | |.
- Both ends of the first wire are marked with the terminal number of X2 terminal strip;
- The ends of the middle wire are marked with the terminal number of X2 and X1 terminal strips;
- Last wire is marked with the numbers of connected devices - X1 terminal strip and PLC input name.
What a mess.
I hope that my explanations and 'diagram' are clear.
Are there any standard containing rules for conductors marking in electrical circuits? I know that all wires connecting two devices have to be marked with the same number. Am I right? What is the correct marking?
Best Regards
Mihaylov