
WWW.SSTAUTOMATION.COM
18
4.3 Run
The data conversion between PROFINET network and CANopne/CAN of GT200-PN-CO is established by
"mapping". GT200-PN-CO has two data buffers, one is input buffer (384/128 bytes); the other is output buffer
(384/128 bytes).
CANopen acts as a master
Communication mode between CANopen and PROFINET is asynchronous mode, as shown below:
"Data 1" shows the data transfer process from PROFINET to CAN; "Data 2" shows the data transfer process from
CAN to PROFINET.
The gateway runs in CANopen network independently, and transmits read/write commands of CANopen
parameters periodically according object dictionary, also transmits and receives PDO commands. When receiving
I/O request from PROFINET, the gateway will instantly respond with the latest CANopen data to realize the
matching of network speed. This is what we called asynchronous mode.
TPDO and RPDO applies producer/consumer mode, and often be used in the occasion with high requirement
PROFINET