Simatic MPI with CPU / OP / PG

Hi all,

Can any of our Siemens experts, clue me into how I can use my PG [Laptop] and my OP connected at the same time to the CPU on a MPI network?

Typically I use "Low" end S7-300 cpu's (i.e. with only 1 x connection port, 312,314 etc)

I obviously program with a PC adaptor connected into the Cpu and then remove to connect my OP, which is programmed via a serial download. form my PG. this mthod is Ok until I wish to monitor or modify the program online with the OP still attached. As I have to remove one or the other to achieve access.

I understand that Siemens do not have a MPI connector by part No. but they can use a profibus connector with a Piggy back. The way this was described to me was that I would use a 2 x Profibus connectors with cable and wire from the OP to the Cpu leaving this in place so I could "Plug" in to the MPI network without having to power off the units. However this costs a bit for this feature in connectors as I would have thought there would be a connector available for this. I don't mind having to power off either and plugging in a connector for commisioning that would allow me this, but I do not want the cost of leaving this in the machine every time I do it. Does anyone have an easier way. I am not that familar with Networking but can I make my own special lead / connector for this purpose.


Cheers

Mylo

Hi Mylo,

There is a connector with an aditional PG connection.

Internet document


Concerns products with the Catalog No.'s:

6ES7 972-0BA50-0XA0 PROFIBUS connector without PG socket
6ES7 972-0BB50-0XA0 PROFIBUS connector with PG socket


The new fast connect PROFIBUS connectors are now available. The insulation-
piercing technology enables a connection without having to strip the insu-
lation from the individual cores.

The following matched components are available for the fast connect techno-
logy:
- Fast connect connector with insulation piercing terminals,
(6ES7 972-0BA50-0XA0 without PG socket,
6ES7 972-0BB50-0XA0 with PG socket).
- Fast connect stripping tool for stripping the outer sheath, the individual
cores and the woven shield in one working step (6GK1 905-6AA01).
- Fast connect cables:
Fast connect standard cable (6XV1 830-0EH10), PVC sheath,
Fast connect robust cable (6XV1 830-0JH10), PUR sheath,
Fast connect trailing cable (6XV1 830-0BH10).

The fast connect system consists of connectors, cables and the stripping
tool and enables a quick, simple, user-friendly and safe installation.

Technical features of the connectors:
- Transmission rate up to 12 Mbaud.
- Sub-D connection on the device side and for additional PG socket.
- Vertical cable exit (same as for 6ES7 972-0BA(B)11-OXA0 connector).
- Integrated, color-coded terminating resistor with isolating function,
i.e. the ongoing bus is separated if the terminating resistor is switched
in (commissioning and service aid).
- Transparent cover for insulation-piercing contacts for an optical check
of contact making.
- Color identification of the terminal for cables A and B.
- Dimensions: 72 x 16 x 34 mm (L x W x D).
- Tension relief and shield connection via permanently attached cover.
- Core cross-sections: 0.25 to 0.35 sqmm, solid or flexible.

We particularly recommend its use for the following units:
- S7-300, S7-400, M7-300, IM 308C.
- ET 200M, ET 200B, ET 200L, ET 200S, ET 200U.
- CP 5431, CP 342-5, CP443-5 and RS 485 Repeater.

In general, the connector can be used wherever the 6ES7 972-0BA(B)11-0XA0
connector with screw-type terminals can also be used.

Your SIMATIC contact at your local Siemens office will answer any further
questions you may have.


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