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Home »  » DeviceMaster RTS, Pro and Serial Hub » Indicators question (What makes the indicators next to the RJ45 go on or off?)
Indicators question [message #1117] Thu, 10 January 2019 22:39 Go to next message
zvis
Messages: 11
Registered: November 2016
Member
I have 2 ports connected as RS485 to each other (through a complex path).
One of them has the indicator on and one does not.
This corresponds to data going fine in one direction and erroneously in the other.
Changing the ports moves the problem to the new ones, so it's not the port itself.
(Side note - how can that happen when both sides use the same wires?).

I could not find anywhere in the manual what the condition for the indicator is.
Any clue would be appreciated.
Re: Indicators question [message #1118 is a reply to message #1117] Fri, 11 January 2019 12:31 Go to previous messageGo to next message
Kurt is currently offline  Kurt
Messages: 290
Registered: July 2016
Location: Minnesota
Power User
Hi,

What DeviceMaster model are you using?
What firmware version is on the DeviceMaster?

Let's see if we can simplify the environment. Can you patch two ports together with a RS-485 straight through cable?
See if send will go from port A to port B, then try sending from port B to go to port A.

Thanks,
Kurt


Kurt Rees
www.comtrol.com
http://forum.comtrol.com/

Comtrol Corporation
100 Fifth Ave NW
Minneapolis, MN. 55112
Direct +1 763.957.6000 | +1 Fax (763) 957-6001
connect. communicate. control

[Updated on: Fri, 11 January 2019 12:50]

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Re: Indicators question [message #1119 is a reply to message #1117] Sat, 12 January 2019 07:37 Go to previous messageGo to next message
zvis
Messages: 11
Registered: November 2016
Member
Hi Kurt,
I have an RTS32 that I know is OK (changed channels with same result).
I am trying to troubleshoot the path to it and the clue I had was that on a good channel
the RX light is ON and on the bad one it is not (in both cases no communication takes place).

The question is what is the criteria for the RX light to go on or stay off in RS485 mode.
I know that communication is not taking place, so is it the path impedance somehow?

Thanks,
Zvi
Re: Indicators question [message #1120 is a reply to message #1119] Sat, 12 January 2019 07:42 Go to previous messageGo to next message
Kurt is currently offline  Kurt
Messages: 290
Registered: July 2016
Location: Minnesota
Power User
Hi Zvi,

What model number is your DeviceMaster? Different models have different behavior.

Kurt


Kurt Rees
www.comtrol.com
http://forum.comtrol.com/

Comtrol Corporation
100 Fifth Ave NW
Minneapolis, MN. 55112
Direct +1 763.957.6000 | +1 Fax (763) 957-6001
connect. communicate. control
Re: Indicators question [message #1121 is a reply to message #1117] Sat, 12 January 2019 09:13 Go to previous messageGo to next message
zvis
Messages: 11
Registered: November 2016
Member

Device Master RTS 32 port RJ45.
At the moment I do not know the firmware version - not at the station.
Re: Indicators question [message #1122 is a reply to message #1121] Mon, 14 January 2019 07:34 Go to previous messageGo to next message
Kurt is currently offline  Kurt
Messages: 290
Registered: July 2016
Location: Minnesota
Power User
Hi,

The Amber LED on the left is solid on if there is a good electrical connection. If there is data being sent on the port, the green LED on the right will be lit.


Kurt Rees
www.comtrol.com
http://forum.comtrol.com/

Comtrol Corporation
100 Fifth Ave NW
Minneapolis, MN. 55112
Direct +1 763.957.6000 | +1 Fax (763) 957-6001
connect. communicate. control
Re: Indicators question [message #1123 is a reply to message #1117] Mon, 14 January 2019 22:36 Go to previous messageGo to next message
zvis
Messages: 11
Registered: November 2016
Member
Good electrical connection as in two wires are connected to the data or a bad impedance (too high or too low)?
Re: Indicators question [message #1128 is a reply to message #1117] Wed, 16 January 2019 07:08 Go to previous messageGo to next message
Kurt is currently offline  Kurt
Messages: 290
Registered: July 2016
Location: Minnesota
Power User
Hi,

More detail-

I got this from the manual
http://downloads.comtrol.com/legacy/dev_mstr/rts/drivers/win xp/12.02/sw_doc/DeviceMaster_Windows_Mgmt_Console_UserGuide. pdf
page 68

Port LEDs

Port LEDs are amber and green on 4, 8, 16, and 32-port. The 1-port and 2-port
models do not have port LEDS. After a port has been opened in RS-232 mode, an
amber LED means that there is link between the port and the serial device. After
a port has been opened in RS-422 or RS-485 mode, an amber LED means that data
is receiving data. A green port LED indicates transmit activity

Thanks,
Kurt


Kurt Rees
www.comtrol.com
http://forum.comtrol.com/

Comtrol Corporation
100 Fifth Ave NW
Minneapolis, MN. 55112
Direct +1 763.957.6000 | +1 Fax (763) 957-6001
connect. communicate. control
Re: Indicators question [message #1132 is a reply to message #1117] Fri, 18 January 2019 09:58 Go to previous messageGo to next message
zvis
Messages: 11
Registered: November 2016
Member
Thanks - did not have that manual.
I guess "receiving data" means that the receiver is connected, because the indicator is on with nothing transmitting.
Thanks for the help,
Zvi
Re: Indicators question [message #1133 is a reply to message #1132] Fri, 18 January 2019 10:02 Go to previous message
Kurt is currently offline  Kurt
Messages: 290
Registered: July 2016
Location: Minnesota
Power User
Hi Zvi,

I'm glad I could offer some assistance. Let me know if you have other questions.
The DeviceMaster does have a data port monitoring function which might help with your troubleshooting.

Please see this document for details:

http://downloads.comtrol.com/contribs/devicemaster/help_file s/tracing/monitor_serial_data_in_devicemaster_using_putty_to _log_file.pdf


Kurt


Kurt Rees
www.comtrol.com
http://forum.comtrol.com/

Comtrol Corporation
100 Fifth Ave NW
Minneapolis, MN. 55112
Direct +1 763.957.6000 | +1 Fax (763) 957-6001
connect. communicate. control
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