Technical data

Chapter 4 Deployment Manual VIPA System 300S SPEED7
4-10 HB140E - CP - RE_343-1EX71 - Rev. 09/46
The ISO transport service (ISO 8073 class 4) corresponds to the transport
layer (Layer 4) of the ISO/OSI reference model. With ISO transport
connections there is the possibility for program and event controlled
communication via Industrial Ethernet. Here data blocks may be
exchanged bi-directional.
The ISO transport connection offers services for a safety transfer of data
by means of configured connections. Large data blocks may be transferred
by means of blocking.
The transmission reliability is very high by the automatic repetition, by
additional block test mechanisms and by the receipt acknowledgement at
the receiver side. ISO transport connections are exclusively transferred via
Industrial Ethernet and they are optimized for the deployment in a closed
manufacturing area.
• ISO transport connections are only suited for Industrial Ethernet
• The receipt of data is acknowledged by the partner station. Here
different telegram lengths may be processed.
• The addressing happens by MAC address (Ethernet address) and
TSAPs (Transport Service Access Point).
• The data transfer is made by the services SEND/RECEIVE and
FETCH/WRITE.
• Independent on the used protocol, the PLC needs the VIPA handling
blocks AG_SEND (FC 5) and AG_RECV (FC 6) for data transfer.
ISO transport
(once H1)
Properties