geniusintraining said:
Im not George (my answers are a lot shorter)...
Mark,
You are more of a "get you there guy", whereas I am more of a "guide you there guy". That's all.
----------------------------
YorkMa,
I would definitely be getting that 1747-UIC. Going in through the Channel 1 DH485 port would have been my advice once we had exhausted all options on the Channel 0 RS232 port.
So, while we await that interface...
When I read your comments I still notice some small discrepancies in how you are viewing and understanding what is what here?...
Let's see what we can ascertain or clear up here...
YorkMa said:
...hi George, i tried the Slc 5/03 i cannt get connectionbefore i unplug anything,the pls is on running mode,key in on run,indication is running and DH485 solid on,port DH485 is connected to controller screen, port rs232 is empty. and i unplug the DH485,nothing change except the DH485 indication flash slowly,rs232 stays dark...
You appear to be a bit mixed up in what the LED indicators represent here. Also, there may be some confusion between the terms "DH485" and "RS232". And also, which port we are referring to having no cable plugged in. So I will lay it out for you so you can be more sure of what you are seeing and what you think you should be seeing...
SLC 5/03 communications ports...
Channel 1:
The top Channel 1 port is physically an RJ45 connector. It uses the RS-485 wiring standard. It is fixed to the DH-485 communications protocol. The sticker on the door beside the port says "
DH485", which denotes which
protocol this port is fixed to, and
not which wiring standard it uses. The LED marked "
DH485" indicates the status of Channel 1
only.
Channel 0:
The bottom Channel 0 port is physically a 9-pin D-subminiature (DE-9) male connector. It uses the RS-232 wiring standard. It can be set for DF1, DH-485, or ASCII communications protocol. The sticker on the door beside the port says "
RS232", which denotes which
wiring standard this port is fixed to, and
not which communications protocol it uses. The LED marked "
RS232" indicates the status of Channel 0
only.
That, hopefully, explains the difference between references to wiring standards and protocols used on these ports, how the ports are labelled and "where" their status is indicated.
Now for "how" their status may be indicated...
From your information above, the Channel 1 "DH485" port is communicating with a terminal of some sort which must also be using the DH-485 protocol. When you unplug the cable from the top Channel 1 port the "DH485" LED indicator will flash slowly as the DH-485 protocol will cyclically poll the network. When you plug the cable back into Channel 1, and communications are re-established with the terminal, the "DH485" LED indicator will be permanently ON, indicating good and active communications on that port.
When you unplug the cable from Channel 1 "DH485", it will only influence the status of the Channel 1 "DH485" LED indicator. It will
not influence the status of the "RS232" LED indicator.
The "RS232" LED indicator signifies the status of communications for the bottom Channel 0 "RS232" port. When this port is at its default settings it is configured to use the DF1 communications protocol. When using DF1, and no cable is plugged into the bottom Channel 0 "RS232" port, the "RS232" LED indicator will be permanently OFF.
DF1 communications to Channel 0...
If you successfully communicate to the controller using the "RS232 DF1 devices" driver in RSLinx Classic, then the "RS232" LED will rapidly flash twice and then OFF in a cyclical fashion. This is just the driver maintaining basic communications with the controller.
If you stop the driver or plug the cable out, then the "RS232" LED will again be permanently OFF.
If you successfully Go Online to the controller in RSLogix 500, using the DF1 driver, then the "RS232" LED will now continuously and rapidly flash. This is because full communications have now been established between the controller and the programming software.
If you Go Offline or plug the cable out, then the "RS232" LED will again be permanently OFF.
To recap...
When using DF1 on the Channel 0 "RS232" port and no cable is plugged in, then the "RS232" LED will be permanently OFF.
When any type of DF1 communications are established with Channel 0 then the "RS232" LED will flash in one pattern or another. At no point, while communicating using the DF1 protocol, will the "RS232" LED remain permanently ON. This is how the "RS232" LED indicator operates when Channel 0 is configured to use the DF1 protocol.
DH-485 communications to Channel 0...
If the Channel 0 "RS232" port has been reconfigured to use the DH-485 protocol, and no cable is plugged into the port, then the "RS232" LED indicator will flash slowly, as the DH-485 protocol will cyclically poll the network, looking for nodes to communicate with. When you plug a cable into Channel 0, and communications are established with a DH-485 device, or network of devices, then the "RS232" LED indicator will be permanently ON, indicating good and active communications on that port. This is how the "RS232" LED indicator operates when Channel 0 is configured to use the DH-485 protocol.
To recap...
When using DH-485 on the Channel 0 "RS232" port and no cable is plugged in, then the "RS232" LED will flash slowly.
When any type of DH-485 communications are established with Channel 0 then the "RS232" LED will remain permanently ON. At no point, while communicating using the DH-485 protocol, will the "RS232" LED flash. This is how the "RS232" LED indicator operates when Channel 0 is configured to use the DH-485 protocol.
Basically, the Channel 0 "RS232" LED behaves the same as the Channel 1 "DH485" LED when Channel 0 is configured to use the DH-485 communications protocol.
Right, where were we?...
YorkMa said:
...i unplug the DH485,nothing change except the DH485 indication flash slowly,rs232 stays dark...i also tried with different key positions, only change is the run indication...
So we are clear - In previous posts I was not suggesting, at any point, that you unplug a cable from the Channel 1 port. I was describing what the Channel 0 "RS232" LED indicator should do when set for a particular protocol and there is no cable plugged in.
I was also not suggesting that you change the key switch position. I was only asking which position it is currently in.
But seeing as you were doing so - when you are unplugging the cable from the Channel 1 "DH485" port, it will not have any effect on the Channel 0 "RS232" LED indicator, as I have explained above. If the "RS232" LED is permanently OFF, with no cable connected to Channel 0, then it is most likely that the Channel 0 "RS232" port is currently configured for the DF1 protocol. But that is not a definite conclusion.
The 1747-UIC will not establish a connection to the Channel 0 port unless it is flashing slowly, signifying it is configured for the DH-485 protocol. You will, as we have mentioned, be able to establish a connection to the Channel 1 port, as this port is fixed for the DH-485 protocol.
But, if the Channel 0 "RS232" LED is permanently OFF, suggesting DF1, then what are the bets that, when you Go Online through Channel 1 using the 1747-UIC, Channel 0 will be configured for the default DF1 settings? Where will that leave you? You will only have confirmed that it is set as the LED indicator suggests it is. If this turns out to the be the case, then that just brings us full circle to the issue as it stands now...
Why can you not establish a connection to the Channel 0 "RS232" port when it "appears" to be configured for DF1? There is still the possibility that the port has either been set to User ASCII protocol or has been "Shutdown". If either are true, then the "RS232" LED indicator will also be permanently OFF.
YorkMa said:
...we also have another machine same processor module same port connection but i can connect with rs232 and check settings and channel 0 system is DF1 full duplex,i tried unplugging and key positons,act same as the one i cannt make the connection.
i tried on a third plc with same processor module and this one both DH485 and RS232 ports are empty with channel 0-system sets as DF1 full duplex, indication acts same. i cannt see any difference...
You could have ten SLC 5/03 processor to check and they may all display the same status on their "RS232" LED, but it does necessarily mean they will all be set the same for their Channel 0 port. As I'm sure you are now realizing, the Channel 0 "RS232" LED being permanently OFF, with no cable connected, can mean any of three normal configurations for this particular port...
DF1
ASCII
Shutdown
I have made a couple of "quick" videos (sorry for the camera shake!) to demonstrate the operations for the LED indicators when the Channel 0 port is set for DF1 or DH-485...
Video:
SLC_5_03_Port_Status_CH0_DF1
Default Communications
No cables connected
Channel 1 DH-485 - "DH485" LED Flashing Slow
Channel 0 DF1 - "RS232" LED Permanently OFF
------------------------------------------------------
Video:
SLC_5_03_Port_Status_CH0_DH485
Channel 1 DH-485 - communications established
Channel 0 DH-485 - no cable connected
Channel 1 DH-485 - "DH485" LED Permanently ON
Channel 0 DH-485 - "RS232" LED Flashing Slow
Any update on the 1747-UIC delivery? I am really curious to know the outcome here?...
Regards,
George