Chromatography Forum

Hi all,

Having some trouble adding a couple of modules (a column compartment and a DAD) to our LC/MS.

All connections are with Cat. 5/5e/6 cables. The computer connects to a switch. The switch connects to a JetDirect Card in 1100 binary pump. Pump connects to ALS with CAN cables. Switch also connects to 6300 Ion trap. IP addresses are handled by the BootP program (JetDirect card: 192.168.254.1; MSD: 192.168.154.10; 1100 Stack: 192.168.254.1).

I thought that I could add a colcomp and a DAD to the 1100 stack with CAN cables and add the modules, but on startup, it only recognizes a maximum of 3 out of 4. Moving the cables around enables me to decide which 3 it recognizes, but I can't seem to get that fourth module recognized!

Firstly, does the setup (the connections going to the JetDirect card and the MSD through the switch) sound typical?

Secondly, any idea why I can't get more than 3/4 modules recognized in Chemstation?

Thanks very much for your time. Any responses or ideas are welcome.

K.

A couple of things I would check:
1) Are all the module on the correct/same firmware?
2) If you attach just the new modules to the pump are they picked up?

It should cope with that setup as we have an LC/MS system (LC = Degasser, binary pump, thermostatted ALS, col oven & DAD). The LC modules are all connected by CAN cables. The difference is we have the jet direct card in the DAD which I understand is more typical for this type of setup. The jet direct card and the MSD are then connected to the PC via a switch.

Yes, I solved the problem by moving the JetDirect card from the pump to the DAD. Everything working great now. Thanks