HBK CB1010, Operating Manual

Page: 47 / 104

45
CANHEAD
CANHEAD ENHANCEMENTS
10 CANHEAD ENHANCEMENTS
10.1 Enhanced data rate (with MGCplus only)
The CANHEAD system works at 250 kBaud as standard. The maximum bus expansion is
250 m. 3000 measured values/s can be transmitted. For example, the maximum data
rate with 4 modules = 40 channels is 75 S/s (3000 S/s / 40).
If the requirements below are met, there is the option to increase the baud rate to
500 kBaud.
Requirements for increasing the baud rate to 500 kBaud
S
The firmware of the ML74B being used must be ≥ P5.18.
S
The MGCplus must be equipped with a CP42 (firmware ≥ P4.50) or CP52 .
S
All bus masters (ML71BS6, ML78B) must also be able to understand signals that are
twice as fast (ML78B: firmware ≥ 5.28).
S
All the CANHEADs in the line must have hardware revision ≥1.40.
S
The firmware version in the CANHEADs must be ≥ 2.16.
S
Cables must be no longer than 100 m.
S
A terminator at the last module must be used for cables of 10 m or longer.
S
The software on the PC (catman or Assistant) must be up‐to‐date.
If all these conditions are met, a data rate of 500 kBaud can be set.
From version 3.5 release 5 of the MGCplus Assistant, there will be a sub‐menu “ CAN baud
rate " under the enhanced settings (right‐click on ML74B).
S
Cursor on SLOT
S
Right mouse button
S
Enhanced settings
-
CAN baud rate
“500 kBaud" can be activated there; the status shows the current baud rate and asyn­
chronous mode. This must be “
double ", to activate 500 kBaud. If there are problems, a