GE Industrial Solutions 6KCV300lNS - Manual (Page 8)

GEI-100445
3.0 BASIC INFORMATION ABOUT INTERBUS-S
PMS provides the user with some services allowing the communication,. The whole service set is not
required by all the applications; for specific applications regarding a profile some limitations exist.
The services offered take into consideration the following criteria:
The service set becomes suitable for the application field of
The uniformity with PROFIBUS is only partially guaranteed.
The services available must be compatible with PROFIBUS.
The times required for the application must be taken into consideration.
The services correspond to an object orientated planning.
3.7 Service Models
The service models allow to process an object; a part of the object is implicitly specified (for example it is
determined by the interface PMS). The other part is explicitly specified in the object dictionary (called OV).
The access to an object is possible through some services and the addressing can be logical (through an
index) symbolical or implicit.
3.1.1 Short service description
The following services can be used with PMS:
Initiate.
Abort.
Reject.
Status.
Identify.
Get OV.
Read.
Write.
Information Report.
3.1 Client and Server
From a communication point of a Client is an application which assigns some duties in order to use the
VFD functionalities (Virtual Field Device) of the remote user process. The Server, on the contrary, carries out
these duties and provides the Client with its VFD
functionalities.
A user process can be both Server and Client (the cards can only act as Servers).
The Client services are only used to assign a duty; such duty is transmitted to the Server through a PDU
message (Protocol Data Unit).