PeterRichter
Member
Hi I am trying to set up remote acces to a Omron CPM1a PLC (with CPM1a CIF01 rs232 adapter) and just don't seem to be able to get it.
I'm using a sixnet VT-1 modem. I have exhausted the help from sixnet and the local omron dealer.
I want to access it from my computer at home. I dont need the remote modem to dial out. I am using Syswin as the connection software.
I have used the sixnet general PLC setting template and changed the protocol to the default in the PLC (9600 baud 7 bit even parity 2
stop bits). I was originally trying to use the built in modem in my PC and laptop, and could get some sort of communications between
the modems and then a fault message saying "no carrier". I read that these type of modems often don't work in this situation
(especially 11 bit), so i tried and old external modem (acer 56 surf) and seem to have gotten one step further. The message I get now
is "no response from PLC". I think I've got the right settings in the remote modem but I'm not sure about setting up the modem and
coms port on the local computer.
The lead I am connecting between the modem and the PLC has pin2 - pin 3, pin 3 to pin2 sig gnd to sig gnd. I have pins 4 and 5( rts,
cts) bridged on the PLC end and pins 7 and 8 (rts cts) and 6 and 4 (dsr, dtr)bridged on the modem end. I am not sure if pin 1(dcs)
should also be bridged in with these as well. I have flow control turned off on the PLC modem.
Should I have flow control turned off on the local end? WHat about DTR control? Am I better of setting everything to the standard 8
bit, no parity, 1 stop bit?
Has anyone actually done this set up or can anyone offer any advice. The sixnet application notes only cover two particular types of
Omron PLC - not the CPM1a. I've been at it for weeks. The omron dealer says that they offer an "omron" modem - but it is just an
office modem that they have put the settings in. I would much rather use a proper industrial modem.
Thanks in advance to anyone that can help
Peter Richter
Richter Process Control
Redcliffe, Qld Australia
richter process control@ optusnet.com.au
I'm using a sixnet VT-1 modem. I have exhausted the help from sixnet and the local omron dealer.
I want to access it from my computer at home. I dont need the remote modem to dial out. I am using Syswin as the connection software.
I have used the sixnet general PLC setting template and changed the protocol to the default in the PLC (9600 baud 7 bit even parity 2
stop bits). I was originally trying to use the built in modem in my PC and laptop, and could get some sort of communications between
the modems and then a fault message saying "no carrier". I read that these type of modems often don't work in this situation
(especially 11 bit), so i tried and old external modem (acer 56 surf) and seem to have gotten one step further. The message I get now
is "no response from PLC". I think I've got the right settings in the remote modem but I'm not sure about setting up the modem and
coms port on the local computer.
The lead I am connecting between the modem and the PLC has pin2 - pin 3, pin 3 to pin2 sig gnd to sig gnd. I have pins 4 and 5( rts,
cts) bridged on the PLC end and pins 7 and 8 (rts cts) and 6 and 4 (dsr, dtr)bridged on the modem end. I am not sure if pin 1(dcs)
should also be bridged in with these as well. I have flow control turned off on the PLC modem.
Should I have flow control turned off on the local end? WHat about DTR control? Am I better of setting everything to the standard 8
bit, no parity, 1 stop bit?
Has anyone actually done this set up or can anyone offer any advice. The sixnet application notes only cover two particular types of
Omron PLC - not the CPM1a. I've been at it for weeks. The omron dealer says that they offer an "omron" modem - but it is just an
office modem that they have put the settings in. I would much rather use a proper industrial modem.
Thanks in advance to anyone that can help
Peter Richter
Richter Process Control
Redcliffe, Qld Australia
richter process control@ optusnet.com.au