Hello,

Can I connect the Panelview Plus 700 with a DH+ connection
on the programming port (9-pins) from the PLC5/25?
I know that normally must this connect to the 3-wire DH+ connection under the programming-port but there is 2 DH+ cables connected to there so there is no place.
The programming-port have the same connection as the DH+ 3-wire
connection on the processor?

Greetings,

mulderm

DH+ can be "starred" if the cable lengths are not too long (ten feet comes to mind, but you would want to verify that) which means you can connect more than one device to each port using paralell wiring. Another way to do it is to wire from device #1 to device #2, using the same connector on device #2 wire to device #3, etcetera. The final device in the string shoud have a termination resistor. I have all the A-B references for DH+ if you need specifics (but they are in my office, not here at home).

Bill

Bill,

The distance of the cable for the DH+ panelview to the program-port of the PLC5/25 is 6 meter.
So this can?

mulderm

Working strictly from my memory here, I think 6 meters is about twice the recommended maximum. Based on my experience though, it will work just fine. A-B specs tend to be very conservative. I would put a termination resistor at the Panel View. If there is a chance that doing this might affect a critical process, I would not take the chance.

Bill

Thank you Bill for the information.

mulderm

If you can bring the system down to program modethe following will work.

Option A
IF your two cables landed at the 5/235 for DH+ ware called Cable1 and Cable2. Then remove Cable 1 and land it at a terminal block. Run a cable 1A from the TB to your PV. Run a calbe 1B from the PV back to where Cable 1 was landed. I know this uses 12 meters of blue hose for s 6 foot run but it will work.

Option B
IF your two cables landed at the 5/235 for DH+ ware called Cable1 and Cable2. Then remove Cable 2 and land it at a terminal block. Run a cable 2A from the TB to your PV. Run a calbe 2B from the PV back to where Cable 2 was landed. I know this uses 12 meters of blue hose for s 6 foot run but it will work.

And the resistor, must I this connected on the Panelview?

mulderm

Using the Option A and B that I list you leave the resistors in their present locations. If wire 1 or 2 had a resistor at the end now 1b or 2b has one at the end where it repalces cable1 or 2.

So the resistor must only place on the end of one cable?

mulderm

Terminating resistors are required at the end of DH+ network. It is sounding like this is more and more of a design work than a running network to which you are adding a Panelview.

If your exiting wire runs from DH+ node 2 to Node 6 to node 3 to node 1. You will need resistors at node 2 and node 1 in this example. IF your new Panelview is node 5 and is added between node 2 your plc and node 6 another plc. resistors are still at node 2 and node 1 after adding panelview.

Boblfoot,

Thank you for helping.
It´s a running network, so I take option A.
For you example must I, when I disconnect the cables, have the power off of the 2 PLC´s
or can I set the 2 PLC´s in program-mode?

mulderm

Since this is a running system disconnecting the cables as mentioned under Option A will cause a fault in communications between the PLC's. IT IS THEREFORE MANDATORY TO HAVE THE SYSTEM IN A SAFE STATE {PROGRAM OR STOPPED} BEFORE DISCONNECTING CABLES!!

Thank you for all the information.

mulderm