Communications configuring
System- and communication configuring D7-SYS - SIMADYN D 3-149
Edition 12.2003
3.15 Peer-to-peer coupling
The peer-to-peer coupling is a serial coupling from drive converter to
drive converter. It allows you, for example
− to implement a fast digital setpoint cascade
− to power-up a multi-motor drive group together
To transfer process data, you can use, a maximum of
− one transmit channel (setpoints)
− one receive channel (actual values)
You can transfer up to five 16-bit pieces of process data via each of these
channels.
You can configure the net data length on the transmit- and receive side
differently.
To be able to use the coupling, you require a
T400 technology module
(terminals 72..75, serial interface X02)
.
Data transfer is realized using a full-duplex technique with a four-wire
cable according to the RS485 standard.
3.15.1 Initialization
You must configure the @PEER function block so that can initialize the
peer-to-peer coupling.
3.15.2 Transferring process data
3.15.2.1 Transmitting
You must configure the CTV function block so that you can transmit
process data.
Select the "Handshake" mode as the data transfer mode, i.e. the
telegram in the previous sampling time must have been completely sent
before a new telegram can be sent.
For this reason, adapt the
sampling time of the CTV function block
− to the baud rate, and
− the number of process data
according to the telegram run time table, provided below.
At connection AT, configure unique channel names for this data interface.
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