agent008
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A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Update: there was some kind of transient current coming through the 422 wires which we traced to the 24V power supply. After I plugged in the Adam 4510 range extender, the transient was amplified and was enough to burn the K3SC's USB connection (ie. stopped being recognized by the laptop)! I suspect this was the cause of the garbled responses from the LK401's. We have rewired the PLC's into a new PSU, the transient is gone. Will now try to connect the LK401's directly to the Adam-4570 as suggested before. Thanks -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Good Morning all So, tried swapping 5 and 6 ans suggested and it is a no go -- at least before the XMT/RCV LED's would blink on the LK202's when trying to connect, after flipping the wires nothing happened. Since the K3SC can be set up (via DIP switches) to act as a USB-RS232 converter too, I disconnected the RS422 network from it and connected a laptop to the K3SC's USB connection. So that both the desktop and the laptop would be connected to each other as a kinf od null modem. Opened Hyperterminal on the PC and on the laptop. Without flipping 5&6 I could send characters from one computer to the other. After flipping nothing would be sent, so I'm assuming 5&6 are connected the right way... So, with 5&6 back in place I opened CX-Programmer on the desktop and left Hyperterminal connected on the laptop. Every time I tried to connect on CX-Programmer to Unit 00, the laptop would receive "@00MB1A03003C*" and a carriage return. For Unit 01 it would get "@01MB1A03003D*" and a CR. Last of all I reconfigured the K3SC for RS232 to RS422 and put back in place the cable from the K3SC to the 422 network, went to the desktop, opened a terminal session and typed the codes above myself. With each keystroke the RCV LED on both LK202's would faintly blink for a split second. When I hit enter (carriage return), the XMT LED on only one Unit (depending on the sequence I typed) would blink once and my terminal would show "s&bbQbb" and a carriage return... So it seems the connections are OK, I will now research what the response "s&bbQbb" means. Thanks UPDATE: from W182 (SYSMAC Host Link Units System Manual) I can see that the response I'm getting is wrong i.e. not on the correct format. I am now scratching my head thinking I might have a "send data" (SDA with SDB) pin inversion on the cable which goes from the LK202 to the K3SC. Is it possible that inverted Send Data A / Send Data B wires would cause garble text to come out? Or the expected outcome would be no output at all? Also I noticed that while the XMT led from the LK202's does blink, the RD led on the K3SC doesn't. Which also tempts me to inver the SDA/SDB wires... -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Found an Adam 4510 RS422 range extender/amplifier. A couple days it'll be here and I can test with it... -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
It was one of the first questions I had myself, but the machine was already set up that way (using the LDM35 configured as a converter). Since I snagged the K3SC practically for free it was worth a shot. About the distance, it is very short! Adding up all RS422 cable length wouldn't even pass the 10 metre mark... -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Hi. Thanks! Will try that tomorrow. -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Right. Will try to find something similar. The wiring looks ok? -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
(posted this on the other forum and think could be of help to understand the problem here too...) Before I got a hold of the K3SC converter, the setup was connected to the Adam 4570 (set up as RS232) by means of a Dataforth LDM35 (kind of a RS232C range extender with RS422 to RS232 conversion capability by just addin a zenerg diode between 2 of its pins). The LDM35 went bust and since I couldn't find one easily, I got the K3SC. Could it be that the LDM35 was not only converting the signal but actually also amplifying it? Thanks -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Here is how the HP Desktop is connected to the K3SC: Computer ====ethernet connection====>Adam 4570 Serial Port 1====Shielded Cable====>K3SC====Shielded Cable====>LK202 I can verify that communications between the HP desktop and the Adam 4570 Serial server work perfectly (have connected another computer to the Adam and tested via Hyperterminal/Putty). Wiring between the ADAM 4570 RS232 and the K3SC RS232: Adam K3SC Pin 1 not connected Pin 2 (RX)--------------------------------------Terminal 5 (SD) Pin 3 (TX)--------------------------------------Terminal 6 (RD) Pin 5 (GND)-----------------------------------Terminal 3 (SG) Pin 4 (DTR)---| (jumped to pin 6) Pin 6 (DSR)---| (jumped to pin 4) Pin 7 (RTS)------| (jumped to pin 8) Pin 8 (CTS)------| (jumped to pin 7) Pin 9 not connected (Although you didn't ask, better err in excess than lack of information...) Here's the wiring between K3SC RS422 and LK202: K3SC LK202 Terminal 7 (SG)-------------------------------Pin 3 (SG) Terminal 8 (RDA [-])-------------------------Pin 9 (SDA) Terminal 9 (SDA [-])-------------------------Pin 6 (RDA) Terminal 10 (NC) not connected Terminal 11 (RDB [+])----------------------Pin 5 (SDB) Terminal 12 (SDB [+])----------------------Pin 1 (RDB) Thanks -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
I'll check it tomorrow and let you know. Thanks so far! -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Tried both: 1-Serial: computer (2007 HP PC with XP)>Adam 4570 (RS232C)>Omron K3SC>RS422 Link Adapter>CLP's (Link Unit 00 and 01). 2-USB: laptop(2004 HP Laptop with XP)>Omron K3SC (via USB)>CLP's (Link Unit 00/01) Thanks in advance -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 replied to agent008's topic in CX-Programmer
Hey, thanks for the quick Answer! One PLC has the LK202 dialed to 0-0-5-2. (Unit 00, 9600BPS-7 data bits-Even Parity-2 Stop Bits, Ladder Software). The other C200H is dialed to 0-1-5-2(so, Unit# 01, other params the same as Unit#00). Both LK202 units have the back switches set as Terminator resistance ON and network type 1:N. The K3SC-10 is set to 9600BPS-7 data bits-2 stop bits, and Pin 9 of the DIPswitch is on to indicate RS232C to RS422 conversion! -
A pair of C200H(CPU03)'s wired via RS422 (LK202) and CX-Programmer...
agent008 posted a topic in CX-Programmer
Dear all, I'm new here and just registered because have been banging my head for weeks now without a solution. I have also posted the same question in another forum so maybe anyone who's in both forums please don't hate me Before I start let me state I searched this forum for anything similar to my doubt, but the topic that could possibly answer my question is 7 years old (http://forums.mrplc.com/index.php?/topic/17957-omron-lk202-host-link/&do=findComment&comment=85783) and the manuals linked there have old links which don't work anymore, so I thought it would be wiser to not reopen it... and just ask in a new topic? So, to the actual facts & question.... We are based in Brazil and have some old (1993) French machinery run by 2 Omron C200h-CPU03 PLC's with attached "Host Link" LK-202 (RS422) cards. These are wired network-style and then connected to a ADAM 4570 serial/ethernet server. Since 2007 CX-Programmer has been used to connect to the CLP's and enter MONITOR mode. However since the machines came to my responsibility we have been unable to connect CX-Programmer and the PLC's in order to check the program and/or error messages! Have recently bought an Omron K3Sc-10 USB-RS422 converter (thinking the Adam 4570 could be at fault) but no luck. I try to connect but get no response. The Transmit/Receive LED's on the K3SC-10 and the LK202 do blink a few times before CX-P gives me the error. What am I missing? Anyone have a clue, maybe it's the wiring? Thank you.