ESD CAN - PCC, Hardware Manual

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Overview
CAN-PCC Hardware Manual Rev. 1.2 4
Data is transferred from the CENTRONICS interface to the CAN byte by byte. Data which is
transferred vice versa (CAN to CENTRONICS) can also be transferred byte by byte.
Older PC-CENTRONICS interfaces, however, do not always have a bidirectional data path. The
software contained in the product package recognizes this and then uses the control lines for the
data transfer. In this case four bits each are transferred parallel.
The data transmitted by the CAN is buffered in a (minimum) 512 bytes-sized FIFO so that no data is
lost at larger data rates.
The CENTRONICS is connected by means of a 25-pole male DSUB connector. The CAN is
connected via a 9-pole male DSUB connector.
The complete communication firmware of the module is contained in the product package. The user
interface between PC and CAN is made of libraries which contain commands to parameterize the
module and control the data transfer. Libraries for Windows (.dll), OS/2 and DOS are available. An
installation program makes it easy to take the module into operation and adapt it to the PC.
The layer-7 protocols for CAL, CANopen and SDS are supported by means of various software
packages (optional) for the PC.