FactoryTalktotheHand
Member
This past weekend I created a "Cable Voltron" where I use an Ethernet Patch Cord as a base and put different ends on it (example: https://www.amazon.com/StarTech-com...F8&qid=1465385000&sr=8-2&keywords=rj45+to+db9 ) depending on what I'm using it for.
So far, I've been able to go online with a Micrologix 1400 via DF1 as well as go online with a SLC 5/04 with the RS-232 port in DH-485 mode.
So the reason I'm asking is that in my null modem configuration (Straight-Thru DB9/RJ45, Patch Cord, Null Modem RJ45/DB9) it is not quite wired up like a CP3 cable. I am swapping pins 2 and 3 (RXD and TXD) as well as pins 7 and 8. However, due to lack of resources I did not jumper pin 1 to pin 6 on either DB9 side, nor did I swap pins 4 and 6 in addition to the others like on a true CP3 cable.
Even so, it appears to function just the same. I can auto config in RSLinx, go online, edit online, etc. It appears I have full functionality.
So my question is, what is the necessity for jumpering pins 1 and 6 and swapping pins 4 and 6 in the 1747-CP3 cable? will not having this in my cable hinder my ability to connect to anything? I'm thinking maybe some legacy A-B PLCs that need this, but I don't know for sure.
So far, I've been able to go online with a Micrologix 1400 via DF1 as well as go online with a SLC 5/04 with the RS-232 port in DH-485 mode.
So the reason I'm asking is that in my null modem configuration (Straight-Thru DB9/RJ45, Patch Cord, Null Modem RJ45/DB9) it is not quite wired up like a CP3 cable. I am swapping pins 2 and 3 (RXD and TXD) as well as pins 7 and 8. However, due to lack of resources I did not jumper pin 1 to pin 6 on either DB9 side, nor did I swap pins 4 and 6 in addition to the others like on a true CP3 cable.
Even so, it appears to function just the same. I can auto config in RSLinx, go online, edit online, etc. It appears I have full functionality.
So my question is, what is the necessity for jumpering pins 1 and 6 and swapping pins 4 and 6 in the 1747-CP3 cable? will not having this in my cable hinder my ability to connect to anything? I'm thinking maybe some legacy A-B PLCs that need this, but I don't know for sure.
